Elektor 1995 04 [PDF]

Zitiervorschau

AUDIO & HI-FI COMPUTERS & MICROPROCESSORS DESIGN IDEAS RADIO, TELEVISION & COMMUNICATIONS SCIENCE & TECHNOLOGY TEST & MEASUREMENT

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ELEKTUR

CONTENTS

ELECTRUNIN In next month's issue FOCUS ON: AUDIO STANDARDS & TEST METHODS MIDI analyser Digital sine wave generator NiCd battery -quality tester Rechargeable alkaline batteries 89C5 1 programmer ADR-Astra digital radio and others for your continued interest.

April 1995 Volume 21 Number 232 ISSN 0268/4519

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Based on an article by J. Heine COURSE: The digital solution Part 5: Storing data By Owen Bishop PROJECT: Stepper motor control Design by B. Yahya PROJECT: Electronic barometer Design by J. Ruiters PROJECT: Bat detector Design by L. Lemmens PROJECT: Sun blind control Design by A. Gessler Chip cards - p. 14

Front cover Many computer owners use their computer to control electromechanical systems. In such applications, it is often required to switch and control stepper motors. The circuit presented on page 36 communicates with the PC via the serial interface, and is capable of driving two stepper motors. One of these takes whole or half steps, the other half steps only. The control board is a general-purpose design that is suitable for a wide range of applications involving stepper motors.

8'

Function generator - p. 8

30

76

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CHIP CARDS: an introduction

62

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c,

14

48

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FOCUS ON: Microcontroller development systems By our editorial staff .

36

b.

New amplifiers simplify wideband techniques A Maxim Integrated Products Application

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8

PROJECT: Function generator

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Design by H. Bonekamp 1

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81 82

80 5

82 70 7 81 72

Book availability & prices Buyers' guide Corrections to earlier articles From the World of Electronics Index of advertisers Readers' services RS Components International goes CD-ROM, too Switchboard Terms of Business

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Focus on microcontroller systems p. 20

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Copyright © 1995 Elektuur

ABC AUDIT BUREAU OF CIRCULATIONS

CONSUMER PRESS

Bat detector - p. 62

Elektor Electronics is published monthly, except in August, by Elektor Electronics (Publishing), P.O. Box 1414, Dorchester, Dorset DT2 8YH, England. The magazine is available from newsagents, bookshops, and electronics retail outlets, or on subscription at an annual (1994/95) post paid price of £28.00 in the United Kingdom; airspeeded: £35.00 in Europe, £44.00 in Africa, the Middle East and South America; £4600 in Australia, New Zealand and the Far East; and $US 59.00 in the USA and Canada. Second Class Postage paid at Rahway N.J. Postmaster: please send address corrections to Elektor Electronics, c/o Mercury Airfreight International Inc., 2323 Randolph Avenue, Avenel, New Jersey, N.J. 07001.

ELEKTOR ELECTRONICS APRIL 1995

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ELEKTOR ELECTRONICS APRIL 1995

From the World of Electronics Consultative expertise - by satellite The development of the CAMNET telepres-

ence system by British Telecom Laboratories (BTL) is about to revolutionize many

of our ideas and practices concerning remedial aid at a distance. The term remedial aid is used in its widest sense to include not only medical treatment and operations but trouble shooting, emergency repairs and specialized maintenance in a variety of systems, equipment and situations: in fact, in all situations where the man on the spot needs immediate and expert advice to tackle and complete successfully the task in hand. CAMNET makes this possible. It is a corn-

munications system that uses a headset incorporating a miniature camera and a built-in screen. Transmissions from the headset can be sent via an umbilical, or radio, or optical link to an integrated services digital network (IsDN) and thence to the remote expert who can send back ver-

bal instructions and visual data in the form of diagrams, text or pointers which can be viewed on the screen. But this system is feasible only where there is an ISDN

channel readily available, while expertise is often needed in remote parts of the world

where no such facilities exist. This matter has now been rectified in a joint enterprise by BTL and ABB Nera (an ASEA Brown Boveri company) to develop

a system in which CAMNET telepresence can be provided by satellite in any part of the world, however remote. CAMNET is an acronym used by BTL for

camera and network technology. At the

heart of the system is an audio visual

elements which is modulated at up to

considerable cost, but a substantial time

8 MHz, the image being swept across the user's field of view by a resonating mirror at 50 Hz. The electronics necessary to drive the CCD camera and Private Eye are housed

delay - first in getting the expert there, and then in getting the items of equipment he

in a belt -pack connected to the SatCom terminal by a 30-m umbilical; this will be re-

cialised equipment in service around the

placed presently by a cordless link. The expert at the base end of the satellite link uses a PC terminal connected to

its video display, he will view the image transmitted from the CCD camera on the

The information is converted to the correct format for display on Private Eye by

Two researchers at British Telecom Laboratories, Kevin Smith and Julian Lucek,

proprietary software running under have developed in recent months what Windows, and transmitted at the press of may be the first all -optical signal regena button; it is sent via the ISDN and SatCom in erator, a significant advance that enhances a dedicated area of the 64-kbit s-1 channel and reinforces Britain's leading position separate from the audio and video. in optical communications. The BT team is examining ultra -fast data processing Intrinsically robust for the sophisticated optical -fibre netThe Saturn Compact Inmarsat earth sta- works needed to meet the world's teletion is intrinsically robust and designed communications demands of the next cenfor trouble -free operation. A recent mem- tury. ber of the family of ABB Nera Saturn InmarTheir achievement uses the results of sat earth stations, with over 3300 in op- research over the past six years at the eration around the world, it has a new de- Optoelectronic Research Centre (ORC) at sign and incorporates state-of-the-art com- Southampton University. Here, 100 sci-

ponents to save weight, space and im-

entists and support staff in world -class re-

prove performance. In addition to the telepresence equipment, it can be supplied with a variety of communications devices such as teleprinters, facsimile transceivers, data modems, and various types of power supply. For

search laboratories sustain and advance previous pioneering work by promoting the theory, basic science and technology

presses video material before transmission.

teleconferencing, it works in conjunction with a 64-kbit s-1 duplex high-speed data

(lisp) system which digitizes and com-

Three units The hardware for the complete system

pressed video picture of the scene being

comprises three units, each shock -mounted

viewed via the Inmarsat A high-speed data facility and the ISDN network to the expert.

Private eye

and housed in a 700x600x300 mm ruggedized moulded polythene trunk. Two trunks weigh 34 kg each, the third 15 kg. The trunks, which are weatherproof, are easily portable by light transport and can

The headset has a miniature screen, which

be manhandled to the most difficult sites.

enjoys the soubriquet of Private Eye,

The trunk for the earth station terminal contains all the requisite electronics as well as a sectionalized parabolic dish which can be quickly assembled on site bringing the terminal on the air within five minutes. The complete telepresence

gives the viewer the observed effect of a

300 -mm monitor at a distance of one metre. The image is an intense mono-

mind.

headset wearer in the field such as line diagrams, circuit diagrams, or text.

and respond to local audio stimuli. Attached to the left side of the headset above the ear cup is a small CCD camera, which in con-

centimetres. The optics of Private Eye

world. Those relating to oil platforms, ships and aircraft spring immediately to

Optoelectronics communications research keeps Britain ahead

CAMNET headset. The PC would also con-

tain data for the expert to send to the

the telepresence application, as well as

viewed with one eye at a distance of a few

problem. The potential applications are only too obvious for all types of complex and spe-

a En' video codec and the ISDN network. On

headset based on a pilot's standard headset comprising earphones and noise -cancelling microphone; but one earphone has been removed so that the wearer can hear

junction with a codec can send a com-

has diagnosed necessary to rectify the

of optoelectronics.

Communications achievements As a prestigious body, ORC maintains strong links with industry and research institutions around the world, and works to increase the numbers of broadly-based and highly -trained scientists and engineers in its field. With its established grant of 12 million over six years, ORC is creating new applications for a world market that has grown to more than 7 billion a year in less than 20 years. The Southampton

initiative has been rewarded by the BT scientists' most recent development and by communications achievements in other British companies such as STC, Mercury and Cable & Wireless.

Britain is among the front-runners striving towards the concept of a vast in-

formation network straddling the earth and providing instantaneous access to centres of knowledge, information and entertainment. This is the Holy Grail of

chrome red -on -black, high -resolution dot matrix with a contrast ratio of 70:1, making it ideal for use in bright conditions. The pixel resolution is 720x280 (HxV), suitable for viewing highly detailed line drawings.

system should take no more than ten minutes to become completely operational. The applications envisaged for the satellite system include any activity where it

has been necessary in the past to fly an

Optical amplifier

The image is produced by an LED bar of 280

expert to the scene, engendering not only

The optical amplifier, the erbium -doped fibre,

ELEKTOR ELECTRONICS APRIL 1995

modern telecommunications, a prize sought after by the advanced economies. Mankind's

big leap forward lies in communications.

6 invented at Southampton in 1987, is rev-

According to Kevin Smith: "To achieve

in generating these pulses, but pulses

olutionizing optical communications around

networks with almost unlimited range at

the world. This device is considered one of the last decade's top three inventions in all fields and is recognized worldwide as a British discovery. The trans -Pacific link between the US and Japan, to be in-

these speeds and beyond, we must use all optical techniques and employ light itself to control light, or photons to control photons. Optical technology is fundamentally

transmitted over thousands of kilometres would suffer significant loss if they were

augurated this year, will use erbium -doped fibre amplifiers.

faster than the alternative - electronics where electrons ultimately control the photons and vice versa."

Colossal potential

oceanic communications and supplies a

Most of the BTwork covers the infrared spec-

large part of the world market. This

tral region and uses light of 1.3 pm and

Northern Telecom business unit has won

1.55 pm wavelength. The time -scales are

a contract for a system from Spain to infinitesimally small, the distances large, Britain, Belgium and the Netherlands. but their potential is colossal. The reliaFrom Spain to the UK and Belgium, the

bility of the system is excellent and, com-

system is optically amplified, but the

pared with the conventional electronic

284 km between Belgium and the

amplifier, the optical system is far simpler.

thought to be the longest in the world.

For the same return, an electronic system requires signal detection, conversion, processing and optical remodulation.

Data transmission The BT innovation could remove the need for electronic amplifiers and make a significant contribution to optical sub -oceanic links, enabling a variety and profusion of information to reach faraway destinations accurately and reliably. Only mode -locked fibre lasers in ultra -fast pulses will be able to accommodate the enormous data trans-

mission demands created by the homes and businesses of the 21st century. This steps beyond the traditional notion of a simple pulse source and the laser is performing essential network functions at the heart of all -optical processors. The BT research team, although capa-

ble of generating unimaginably fast pulses in the femto-second (10-15 s)

P.O. Box 1414 DORCHESTER 1712 8YH England

Telephone: (01305) 250995 (Natrona') or +44 1305 250 995 (International) Fax: (01305) 250 996 (National ) or +44 1305 250 996 (internationa/) U.K. Advertising Office: 3 Crescent Terrace CHELTENHAM GL50 3PB Telephone. (01242)510 760 Fax. (01242) 226 626

International Advertising Office: EleictuurBV P.O. Box 75 6190 AB BEEK The Netherlands

'llephone: +31 46 38 94 44 Fax: +31 46 370161

inserted along the system. The use of This is a very rapidly evolving field, where

and, to support this telecommunications technology of the 21st century, a wave

many are competing for the pulse source prize. In the laboratory, at the moment, the

phenomenon known as the soliton, brought to optical reality by ORC in recent years.

mode -locked erbium fibre laser is favourite.

The capacity of soliton systems is very

high and in this 'shrunken -time' world, where a second is measured in hours, broaden. Lasers, unlike normal pulses, can today's electronics can not easily manipcreate soliton-like phenomena. Only in ulate the pulses. All -optical processing, with the last few years have scientists both in switching capabilities of the order of piBritain and elsewhere begun to see the soli - coseconds (.10-12 s), reigns supreme, at ton as a fundamental of future commu- least for the time being. A soliton is a non -dispersive optical pulse, a pulse that in principle does not

nications technology, providing a near -per-

fect, dispersion -less pulse that maintains its fidelity while in the transmission system. 13T has been pioneering the use of fibre lasers

Editorial & Administrative Offices:

50 km apart, ensure the entire network is transparent and eliminate huge losses. This development is revolutionizing the way engineers are starting to think of these networks, allowing them to concentrate on the data bits, that is, pulses used to communicate information, and this is where the solitons come in. Fibre lasers generate the pulses, their sources being the same as the amplifiers

bium amplifiers, mode -locked fibre lasers

Erbium fibre

Editor Len Seymour Technical Editor: Jan Butting

is used to excite them. A signal weakened by distance along a fibre can extract this energy and receive gain from the excited

mode -locked fibre lasers represents one layer of technology beyond the fibre laser.

realistic' time -scale of 100 Gbit s-1.

ELECTRONICS (Publishing)

rare metal erbium; a laser pump source

Kevin Smith's development uses er-

range, prefers to concentrate on a 'more

Produced and published by ELEKTOR

core of this fibre is doped with ions of the

erbium. The amplifiers, installed up to

Britain's STC Submarine Systems is a

lead company in undersea and trans-

Netherlands is an unrepeated system

not rescued by erbium -fibre amplifiers. The

Unit 4, Gibbs Reed Farm Pashley Road T10EHURST TN5 7HE

Telephone: (01580)200657 (National) or +44 1580 200 657 (International) Fax: (01580)200 616 (National) or +44 1580 200 616 (International)

Overseas editions: FRANCE Elektor sari Les Trois Tilleuls B.P. 59; 59850 NIEPPE

NETHERLANDS Elektuur BV Peter Tretkpoel straac 2-4 6191 VK BEEK Baggen Editor:

Editor G.C.P. Raedersdorf

GERMANY

POLAND Elektor Elektrotiik 02-777 Warszawa 130

Head Office.

Elektor Verlag Gntbli

P.O. Box 75

SUsterfeld StraBe 25

6190 AB BEEK The Netherlands Telephone: +31 46 38 9444

5100 AACHEN Editor: E.J.A. Krempelsaner

Telex: 56617 (elekt n1) Fax +31 46 37 01 61

GREECE

Ferreira & Bente Lela

Elektor EPE Karaiskaki 14 16673 Voula-ATHENA Editor: E. Xanthoulis

R D EstefIni, 32-1°

Managing Director: Johan H. Borman Deputy Managing Director Menem KJ. Landman EdItordn-Chief/Publisher. Pierre E.L Kazemakera Commercial Manager. Karel van Noordenne

Distribution: SEYMOUR 1270 London Road LONDON SW16 4DH

Subscriptions: World Wide Subscrtpttoa Sery

ELEKTOR ELECTRONICS APRIL 1995

Printed in the Netherlands by NDB, Zoeterwoude

Skrytka Pocztowa 271 Editor: W. Marciniak

PORTUGAL 1000 LISBOA

Editor F Foams de Almeida SPAIN

INDIA Elektor Electronics PVT Lid Chhotani Building 52C, Proctor Road, Giant Road (B) BOMBAY 400007 Editor: C.R, Chandarana

ISRAEL Elektorcal P 0 Box 41096 TEL AVIV 61410

Publisher: M Avraham

Resistor Electronica Aplica.da SA P. de la Castellana. 212-4° Lida 28046 MADRID

Editor: Agustin Gonzales Bueka

SWEDEN Electronic Press AB Box 5505 14105 HUDDINGE

Editor: Bill Cedrum

RS COMPONENTS INTERNATIONAL GOES CD-ROM, TOO Preliminary details of the as with the conventional catfirst release of the RS alogue, moving progressively International catalogue on between section, sub -section CD-ROM were unveiled at a press briefing at the RS

RS

and product group before making a final product se-

headquarters in Corby, on lection. Alternatively, the 18 January 1995. This CD- user can search by typing in ROM, which will be available a key word, or a partial or in March 1995, follows the complete version of the RS resounding success of the stock number or manufacUK version which was first turer's own part number. introduced in July 1994. Designed to assist equipment designers, engineers and purchasers in the selec-

Containing approximately 10,000 full colour product illustrations, the CD-ROM of-

and electrical tronic, mechanical components, RS Components International

ages of a range of alternative products for browsing, while a `view' function examines a

RS

fers a unique 'virtual page' tion and ordering of elec- function that brings up im-

has developed a CD-ROM version of its product catalogue. The RS 'Electronic Catalogue' runs on all stan-

particular product in detail, displaying all relevant catalogue data. A 'related product' function allows the user dard IBM compatible PC to identify products used in conjunction with the prodconfigurations.

-a.

The first of its kind and uct choice. The ordering function of

available free to RS cusElectronic tomers, the Catalogue, like its paper

111,

the electronic catalogue en-

ables significant time sav-

millr-4

companion, is updated an- ings to be made. In making a With over six nually. Gigabytes of compressed

product selection, a standard

order form can be

data on a single CD-ROM called to simultaneously detailing over record order details of the disc, 40,000 components, and in- selected item. Order forms cluding the RS Technical can be archived and output Data Library, the user has a to printer or fax using an aprange of options that help propriate software/hardware

The complete RS Components catalogue (who does not have a copy?) and RS Data Library are now available on CD-ROM. Note that the international version of the catalogue consists of one (very thick!) book only, whereas the UK version is split into three volumes.

speed up selection of the interface. product best suited to an ap-

plication. Searching

RS Technical Datasheets form an integral part of the

by product new electronic catalogue. process, supporting in-depth 1995 in Europe and the rest type, the user can `browse' During the product selection technical datasheets can be of the world, with country called up for reference, mak- specific introductory secing it even easier to identify tions ensuring customers the most appropriate solu- receive distribution and contion to a technical problem. tact information relevant to A simple start-up proce- their market. (950059) dure ensures fast installation of the electronic Further information from catalogue, while a powerful your local/national RS graphic tutorial section and Components distributor, or on-line help facility help to from RS Components guide the user around the International, P.O. Box 99, new system. The CD-ROM Corby, Northants NN17 9RS, runs on a conventional CD- United Kingdom. Tel. (+44)

ROM reader operating with a 1536 201234, fax (+44) 1536 standard PC equipped with a 401096. Telex: 342512.

minimum of a 386 processor, 4 MB RAM, Windows software and VGA screen. For enhanced operation, a 486 -based system with an The RS Components headquarters are housed in a 75,000 m2 (equiva-

lent in size to ten football pitches) warehouse and office complex in Corby, Northants, England. Over 10,000 orders are processed at terrific speed every day at this location, including orders for the 'retail' branch of RS Components, Electromail.

ELEKTOR ELECTRONICS APRIL 1995

SVGA, 256 -colour screen is recommended. The international versions

of the CD-ROM catalogue will be available from March

8

FUNCTION GENERATOR Design by H. Bonekamp A simple function generator is described, which provides rectangular, triangular and sinusoidal waveforms in the frequency range d.c.-100 kHz. In contrast to many 'simple' function generators, it provides a fairly good sine wave. Alsmost all function generators conist of a variable -frequency, rectan-

gular -wave oscillator that provides a number of switch -selected frequency ranges. Its output is applied to an integrator which converts the rectangular waves into triangular ones. Finally, the triangular waves are converted to 'sine waves' by soft clipping with a diode.

The present generator is no exception as is shown in Fig. 1. The triangu-

100 kHz. Its amplification is arranged at exactly x5 by R5 and R6. Frequency control of the oscillator is to

obtained by driving an integrator, consisting of R8, IC2b and one of capacitors C3 -C7, with the rectangular wave. The

op amp ensures that the capacitor se-

lected with SI, is charged or dis-

charged at constant current. This gives rise to a triangular voltage. The speed

at which charging and discharging takes place depends on the capacidiodes and has an output voltage of tance and the applied voltage. The lar -to -sine wave converter is based on

5UD, where UD is the forward voltage of value of each of capacitors C3 -C7 difone diode. It can be shown that for cor- fers by a factor 10 from the preceding

rect operation, the converter needs an input of (n/2) x 5UD.

Moreover, the diodes in the converter make it necessary for the input voltage to be temperature -compensated. This is assured by limiting the output of the comparator to 1 UD by two

anti -parallel connected diodes. This is raised to a level of 5UD by the amplifier.

The 1:0.5n ratio of the feedback resistors ensures that the input voltage to the triangular -to -sine wave converter is (n/2) x 5UD as required.

Circuit description In Fig. 3, the comparator of Fig. 1 is formed by ICib. Capacitor C2, shunting R2, compensates for the delays caused

by op amps ICia and ICib, so that the level of the output voltage of the rectangular -wave generator remains fairly constant up to 100 kHz. Capacitor C1 decouples R1 for h.f. to

one. Switch SI, which selects one of the capacitors, thus provides subdivi-

Parameters Frequency ranges: 1 Hz - 10 Hz 10 Hz 100 Hz 100 Hz - 1 kHz

10 kHz 10 kHz - 100 kHz Functions: rectangular, triangular, sine wave Rise time (rectangular wave):

-0-

-0j)

comparator V

limiter should operate symmetrically, it is important that the diodes are matched. The amplifier is formed by ICia. This

0E1 950044 - 12

is an op amp with a fairly high slew rate (300 V ps-1) which is essential for a well -shaped voltage at frequencies up

Fig. 1. Principle of a function generator. ELEKTOR ELECTRONICS APRIL 1995

FUNCTION GENERATOR

9

The symmetrical power supply follows the usual pattern of mains transform, bridge rectifier, buffer capacitors and two voltage regulators, IC4 and

two whose knee voltages are identical or very nearly so. This is ascertained by connecting the diodes in series with

The generator is intended to be built on

ment.

an 8.2 kS2 resistor to a 12 V d.c.

IC5. Since the circuit does not draw source, and measuring the drop across much current, the specification of the each diode with a digital voltmeter. Do transformers and buffer capacitors is not touch the diodes during the measurement and make sure that the ammodest. bient temperature remains constant: small differences in temperature can Construction have a large effect on the measure-

The same applies to the 1N4148 the printed -circuit board shown in Fig. 4. Note that the transformer, diodes for the triangular -to -sine wave

switches and preset controls are converter. Using the method just de-

scribed, select ten with an identical or near -identical knee voltage. From these, select five pairs that are identi-

mounted directly on to it.

It is advisable to adhere strictly to

Fig. 2. How the sine wave is shaped.

the components and devices specificed in the parts list. Many resistors have a tolerance of not more than 1%. Capacitors C3 -C7 should be good quality types; do not use an electrolytic capacitor in the C3 position, but a polypropylene or polyester type. Diodes D1 and D2 should be

The three output signals are applied to FUNCTION selector S2. Circuit IC3 am-

plifies and buffers the selected output signal. The amplification is set to x3.5 by R15 and R16, so that the output volt-

age can be adjusted with P4 between 0 V and 20 V The output impedance

cal: D3 -D4; D5 -D6

shown in Fig. 5. This is readily fitted in

an 80x200x132 mm enclosure-see

Fig. 6 -with suitable spacers. A suggested front panel (a photo copy of which can be used as a template for drilling the front panel) is shown in

matched. Instead of buying two, buy four of them. From these, select the

is fixed at 600 52 by R17.

Fig. 7.

05

D3

D7

D9

D11

13 i4 15 16 17

R2

C

68p

7

1p5

R3

150p

5

4

10k0

5

R6

-177071-0

1

(:).

5

-

6

rn

D11 -D12.

The completed prototype board is

01

C1

Si

0-6

R8

IC1a

10k0

R10

IC2b

1 k00

P2

IC2a

A 1klin 02

R5

R7

R11

R9

co

Tn

mi.

2x 1N4151

S2 2

TR1

4x 1N4001

® 15V

C13

IC4

mim

15V

:100n R15

R17

IC3

K1

60452 8

4

R16

IC1 = AD827/JN 1C2 = OP249GP

AD847JN P4

10k lin

-

:17 700n

105

Fig. 2. Circuit diagram of the function generator. ELEKTOR ELECTRONICS APRIL 1995

O

15V

950044 - 11

10

TEST & MEASUREMENT

01

1

Ra

amt 10 2

Z10( R2

TR1

I°

1-t

0;r

"... K2

cia

°UK° 03 K1

t

Lt71:4

950044-1

P2 '3/4 - od1-

C5

1C4 C8

0

I

Fig. 4. Printed -circuit board for the function generator.

Calibration There are two calibration controls: P1 and P3. The former sets the operating point of the limiter, which is important

for the production of the third harmonic of the sine wave; the latter causes a small offset correction voltage

to be added at the input of op amp IC2a, which affects the second harmonic. A spectrum analyser makes their setting easy: adjust them (at

1 kHz) for minimum amplitude of the

two harmonics.

Where a spectrum analyser is not available, calibration can be carried out with a dual -channel oscilloscope and a digital voltmeter.

Apply one channel of the scope to the junction R6 -pin 1 of IC la, and the other channel to junction R12 -R13 -R14.

Connect the scope's earth to junction RTP2.

Switch on the generator and the os-

cilloscope and set the generator to

1 kHz, whereupon channel 1 shows the

rectangular wave and channel 2 the sine wave. Adjust the attenuators and

Fig. 5. Completed printed -circuit board. ELEKTOR ELECTRONICS APRIL 1995

FUNCTION GENERATOR

P2 = 1 ki/, linear potentiometer P3 = 100 Id2, preset P4 = 10 kf2, linear potentiometer

Capacitors: C1 = 1 nF, polypropylene C2 = 68 pF, ceramic C3 = 1.5 pF, polypropylene/polyester C4 = 150 nF, polypropylene C5 = 15 nF, polypropylene C6 = 1.5 nF, polypropylene C7 = 150 pF, ceramic C8, C9 = 1000 pF, 25 V, radial C10, C14 = 10 pF, 16 V, radial C11 -C13, C15 -C17 = 100 nF

Semiconductors: D1, D2 = 1N4151 (matched - see text) D3 -D12 = 1N4148 (matched - see text) D13 -D16 = 1N4001

D17 = LED, high efficiency

Integrated circuits: ICI = AD827/JN (Analog Devices) IC2 = OP249GP (Analog Devices) IC3 = AD847/JN (Analog Devices) IC4 = 7815 IC5 = 7915

Fig. 6. Completed function generator with top cover removed.

X/Y controls of the scope so that both waves fill the screen and cover one another. Then, adjust P1 until the amplitudes of the two waves are equal. Set the digital voltmeter to the direct voltage range and connect it across the output of the function generator. Turn P4 fully anticlockwise and note

Parts list Resistors:

the reading on the voltmeter: this is

R7 = 82 CI R11 = 470 IcI2

the offset voltage of IC3

Turn P4 fully clockwise and adjust P3 until the voltmeter reading is the same as in the preceding paragraph.

Miscellaneous: K1 = BNC connector K2 = 2 -way terminal block, pitch 7.5 mm S1 = 2 -pole, 6 -position rotary switch S2 = 4 -pole, 3 -position rotary switch

RI = 6.19 kS2, 1% R2 = 15.8 1.(52, 1%

R3, R8 = 10.0 k52, 1% R4, R9= 4.7 kS2 R5, R10, R14 = 1.001d2, 1% R6, R13 = 4.02 k52, 1%

S3 = mains on/off switch Tr1 = mains transformer, secondary 2x15 V, 3 VA (Velleman 2150038M Maplin)

Enclosure 80x200x132 mm

R12 = 2.43 kcI, 1%

(31/8x77/8x53/16 in)

PCB Order no. 950044-1* Front panel foil Order no. 950044-F* * see p. 70 0500441

R15, R18 = 6.8 Ic4 R16 = 2.7 IcC2

R17 = 604 52, 1% P1 = 10 ki-2, preset

x 10kHz

FREQUENCY

5

0

4

x lkHz

6

x 100Hz

7 x 1014z

3

POWER

2

8 9

x

1Hz

FUNCTION RANGE 10V 8V,....r.,j2V

1

10

6V

4V

2V

FUNCTION GENERATOR

LEVEL OV

OUTPUT 14V 16

18V

60062

20Vpp

950044-F

Fig. 7. Suggested front panel for the function generator (true scale). ELEKTOR ELECTRONICS APRIL 1995

Please mention ELEKTOR ELECTRONICS when contactil g advertisers

,

12"

,

:

'

"1

V lEWCO

DIGITAL INTEGRATED CIRCUIT SPECIALIST

40088 0.42402867 0.44

0.43 0.78 0 78 0.95 0.65 0.38 0.76 0.38 0.45 0.56

4029611 4040137

ass a70

404287 404687 0.49 404707 0.74 404967

0.74

044 401687 0.66 401767

560 401887 1.12 402087 1

12

402167

0.44 402387

184 402487 044 402567 0.36 402707

0.92 1.20 1.24 1.89 1.14 1.10 1.82 1.48 POA 1.36 1.36 1.88 1,88 1.49

74607237 1.20 74607238 0.69 74607240 0.53 74HC7241 058 74HC7242

74607243 74607244 74607245 74607251 74607253 74607257 74607258 74607259 74607273 2A0 74607280

1.24 1.24 0.54 0.54

74810 74611

74613 74614 74F20 74F27 74630 74F32 74F37 74F38 74640

0.28 0.28 POA 0.36 0.39

7440251 74A0253 7440258 7440273 7440283 0.41 7440299 0.28 7440373 0.28 74AC374 0.51 74AC377 0.44 744C521 0.94 7440540 0.94 7440541 1.24 7440573

060 791264 0e0 7915 0.60 1.10 1.40 2.06 0.94 0.92 0.98

7918 7924

0.98 354/100V/Sqr 2.98 Freq.= MHz 1.64 1MHz £8.90 ea. 0.68 KBPC1002

1sa KBP03502

1.11 1.11 1.11 1.11

298

1.60 W005 -14/50V a32 4 4 9152 6 8 9 8304 0.28 W02G-1.54 0A0 10,12,15,16, 19.6608 0.98 2W02 040 .

797124 79M05 79M054

1.82

79M12 1.82 79M124 1.82 POA L4805CV 3.40 6.40 298 L4940V5 74651 028 LM317MP 0/8 1.24 74F64 0.78 128 LM3 1 71 1.24 74F74 4A5 0.31 7440574 1.38 LM338K 74110651 2.81 74LS693 POA 74175 1.10 741_0189 1.29 74F85 7460652 2.24 7440646 POA LT1084075 622 0.54 74LS794 POA 746C658 74180 1.16 7470190 0.34 744C648 POA LT1085075 6.60 POA 74607283 064 74686 049 74LS795 POA 74184 POA 74L0191 0C41959 2A0 7490659 POA 74607297 1.48 746109 0.58 0.54 741_8796 POA 74185 1.76 741_0192 7L7830K0 628 7460664 POA 74HC7299 1.68 746112 0.63 0.48 74LS797 POA 0.50 74191 1.26 74L0193 7460665 POA 74HC7354 0.74 74F113 POA 74000 0.54 74L0848 POA 1.41 74LS194 74192 0.50 DIODES 7460670 1.15 74607356 1.54 746114 POA 74CO2 1.25 0.50 74193 1.65 74L01944 0.54 81LS954 7460677 POA 74807365 1.28 746125 0.56 74008 74221 050 19298613018.20 2.40 74LS1 954 0.56 81LS974 1.25 741-10678 POA 74607366 124 746126 POA 74010 2.54 POA /4259 2.92 741_0196 74HC SERIES 741-10680 POA 74607367 0.59 746132 ass 74014 POA 1N3881 6.55 0.46 74265 0.50 1939974 1.46 7475221 022 7460682 POA 74607368 1.29 74F138 0.58 74020 7411000 0.04 0.50 I N4001 POA 74LS224 10.30 746002 74273 0.58 74030 POA 74607373 0.52 746139 0.22 7460684 0.48 004 74276 5.18 74L0240 0.50 1N4002 0.28 741-10680 0.74 74607374 0.52 746148 POA 74032 746003 0.48 024 1N4003 79279 1.78 POA 7470241 1.47 1.62 74607377 0.65 746151 0.22 7460690 746004 POA 0.04 POA 741_0242 74046 74283 1.84 1N4006 1.82 74HC7390 0.68 7460004 0.24 7460691 0.50 0.04 74LS243 1.68 194007 0.56 74073 1.82 746C7393 0e8 746157 746005 0.32 7460692 0.48 0.03 POA 7449244 194148 74365 74074 0.89 080 0.48 7460693 1.82 74607394 POA 746158 746007 0.50 0.06 1.14 1N4149 POA 741_3245 74367 1.82 74807423 0.82 746160 0.90 0.22 7460696 74HCO8 POA 0.08 4.89 7412247 1.66 194150 74393 1.63 7461604 POA 74085 0.48 7460697 1.82 74607533 746009 POA D.06 194446 POA 74LS244 74090 74403 1.16 1.42 74607534 0.75 74F161 098 0.29 7460698 746010 POA 0.24 74423 POA 74LS249 1.63 1947284 1.62 74607540 0.66 746162 POA 74093 746011 0.22 7460699 74L0251 0.00 0.24 0.74 746163 0.88 740150 3.48 1947354 746014 0.26 74604002 0.48 741-107541 0.00 0.24 741_000 0.18 74LS253 7460144 0.36 74604015 1.07 741-107563 1.46 746164 0.88 740151 POA 1947364 74L0256 POA 0.24 741_001 024 3.82 740154 4.88 1947404 746020 0.24 74604016 0.58 74607564 1.67 746166 000 746021 0.24 3.02 1N4743A 740157 74LSO2 0.18 741_0257 0.74 746168 POA 74604017 ass 74607573 0.24 0.24 1947444 74LS03 220 741_0257A 0.48 746027 3.60 740164 1.91 0.24 74604020 0.52 74607574 0.74 74F169 1.00 0.24 0.21 74LS258 741_804 0.80 740221 2.54 1144756A 0.24 741-104022 0.74 74607583 1.48 746174 746030 0.14 195226B 1.38 740240 741_505 0.21 741_02584 0.48 746032 74607597 1.52 746175 0.80 0.24 74604024 0.62 POA 0.14 744506 0.51 74LS259 6.85 740244 1.38 1952328 746042 0.54 74604028 0.58 74607640 1.34 74F181 POA 0.14 741_007 0.51 74L5260 POA 740373 1.38 1952348 741-1051 0.32 74604040 0.48 74607643 1.97 74F182 POA 1953370 740374 1.38 0.98 741_808 0.18 741_0266 4.40 74604046 1.44 74607646 2A0 746189 746058 0.54 7475273 POA 0.98 74L009 0.20 0.38 7460404641.90 74607648 6.40 746190 POA 740901 0.94 1953490 746073 POA 0.98 747010 0.18 741_0275 2.92 740902 0.94 1953526 0.28 741104049 0.46 74607651 POA 746191 746074 0.35 11153578 0.98 740903 POA 74LS11 0.18 74LS279 74607652 POA 746192 POA 7460744 0.28 74604050 0.38 0.86 0.98 74LS12 0.16 741_8280 7411075 0.48 74604051 0.74 74607670 1.10 74F193 2.92 740906 0.94 19536513 0.94 1 953660 0.98 74LS13 0.24 1.36 746076 0.48 74904052 0.74 74607673 POA 74F194 POA 1953700 0.98 1.51 740908 74LS14 0.24 74L0290 746C77 0 52 74604053 074 74607688 1.10 746195 2.00 19538013 ass 74L215 0.38 74LS292 14.58 746C85 0.52 746040534712 746C74002 0.39 746219 POA 740911 13 98 0.42 0.11 74L020 0.20 74LS293 746086 0.30 74604060 0.46 746074015 1.41 74F224 POA 740912 13.98 195401 1N5402 0 11 740914 0.94 741_521 0.20 741_0294 1A58 746093 0.48 74604061 POA 746074016 as2 746240 0.60 1.55 0.24 741_0295 POA 7460107 74L522 0.60 740915 2.24 1 N6287A 0.48 74604066 0.50 746014017 0.68 746241 2.98 740922 5.60 1 N825 741_024 0.68 74LS2954 POA 7460109 0.46 7460406640.58 746014020 074 746244 0.60 2.98 198254 740923 6.28 741_526 0.20 74LS294 POA 74110112 0.50 741104067 4.72 746014024 0.68 746245 0.66 1.76 3.42 74LS27 0.20 741_0299 7460113 0.54 741-104072 0.48 746014040 0.70 74F251 POA 740925 8.40 19827 3.29 0.20 74LS28 0.24 74L0321 7460123 0.42 74604075 0.44 746074046 2.10 746251A am 740926 8.40 100252 POA 0.66 5082-2800 740929 POA 747030 0.18 7475322 744C123A D.42 74604078 0.46 748074051 0.96 746253 POA 74LS322A 608 7440125 0.42 74604094 0.78 746074052 0.96 746257 P0A, 80095 0.76 5082-2810 2.47 POA 0.68 74LS32 0.20 74LS323 744C126 0.45 74604316 0.74 741-1074053 0.84 7462574 0 56 80098 0.98 5082-2835 POA 44119 0.60 74LS33 0.60 74LS347 0.52 74604351 1.05 746074059 2.24 74F258 POA 746C131 POA 0.72 741.037 0.20 741_0348 7440132 0 60 74604352 1.62 746074060 0.84 746259 POA 745 SERIES A4144 POA 0.58 744038 0.18 74LS352 0.68 44Z15 7460133 0.44 74604353 1.62 746074066 0.66 746260 0.76 74500 POA 0.58 0.68 7460137 0.72 74604511 0.84 746074067 5.78 74F269 5.54 74502 74L-5353 74LS363 POA 4218 08010A 0.48 741_042 0.32 7460138 0.34 74604514 1.10 746074075 0.36 74F273 0.96 74003 POA 0.12 741_544 2.11 741_5364 74504 0.68 746074094 084 746280 74E104515 1.85 74HC139 0.70 0.32 4.98 744547 0.68 741-0365 - 74H0141 POA 74604518 0.87 749014316 0.68 746283 1.00 74808 0.68 BAV45 74L03654 0.54 0.06 0.64 741_548 0.68 BAW62 7460147 0.68 74604520 0.78 746074351 1.04 746299 POA 74009 POA 0.08 POA 741_0366 744S49 1.10 134016 7460148 0.72 74604534 POA 746074510 1.54 746323 POA 74810 00204 0.44 0.22 741_83664 POA 7490151 741_051 0.40 74604534 0.68 746074511 0.94 746350 POA 74811 741_8367 0.36 2.94 744054 0.28 0.68 8821 2 7460153 0.42 74604543 098 746074514 1.64 74F352 POA 74020 0.33 744855 a44 741_03674 0.36 74110154 0.62 74607001 1.01 746074515 181 746353 POA 74S32 0.68 BE1405E1 74LS73 a35 741_0368 026 7460155 0.72 741107007 0A2 746014516 POA 746365 POA 74038 0.68 80805 050 74703684 POA 0.74 744573A 0.79 0.25 87179 7460157 0.42 74607032 POA 746074520 0.90 746366 PO4 74540 0.48 0.20 741-0373 744274 0.36 BY260-200 3.58 7460158 0.54 74607074 POA 746074538 1.02 746367 1.42 74551 741_0374 0.48 BY261-200 3.98 744574A 0.26 0.74 74607240 0.98 746077007 0.39 742368 POA 74064 0.36 74140180 0,42 741_575 0.25 741_5375 183 BYV28-100 0.99 74140161 0.42 74607241 0.98 746077038 5.40 74F373 0.60 74074 744S76 POA 7413377 "'"- 7440162 0.74 74607244 0.98 74H017046 2.80 748374 0.60 74086 0.83 80032-50 1.60 POA 0.60 744S76A 1.05 741_0378 7460183 0.42 74607266 0.66 7460140102 2.43 746377 1.34 745112 a90 CV8805 741_5379 1.50 0.40 0.44 741_577 7440164 0.42 74607292 1.10 7490140103 1.48 74F378 2.72 745124 3.13 DS160 M01404 15.90 74L578 0.32 74L5381 A PO4 7460165 1.11 1.10 7460740104 POA 746381 5.70 745132 608 7460166 0.55 74607294 MV209 1.82 74LS83 0.39 74L5385 0.86 74607640 1.98 74E385 POA 743133 0.80 74HC SERIES POA 0.84 744S83A 0.39 74L0386 7440173 0.76 74607643 1.98 746395 POA 748134 2.15 04200 SURFACE 04202 0.84 741_085 0.36 74L5390 0.97 1.98 746399 POA 7401313 7460174 0.42 74607645 MOUNT 0.42 0.14 744386 0.26 741_8393 748412 POA 740139 0 97 0A47 7460175 0.36 746040102 1.32 POA 74HCOOM 0.32 0.14 741_090 0.32 74LS395 1.94 746040103 1.12 746413 POA 740140 1.02 0490 7460181 0.32 74F432 POA 740153 0.99 741_291 POA 74L03954 POA 7460182 1.39 P6KE313A 0 59 746040105 1.42 746002M POA 7411003M 0.32 74F521 0.99 744592 POA 7475396 1.05 740157 1.89 P6KE47A 7440190 0.88 POA 232 746524 POA 745163 279 REC534 0.92 744093 0.40 741_5398 7460191 0.68 74HCT SERIES 746004M 0.92 7460004 0.32 ZP02.7V 0.06 741_595 0.48 741_0399 740174 1.01 7460192 0 78 746533 POA 0.98 0.32 741_696 0.82 741_5423 7460193 0.76 74110702 0.24 746008M 746534 P08 745175 1.49 741_5445 POA 0.32 746537 POA 740182 74LS107 3.62 ZENER DIODES 7460194 0.78 7490103 0.28 746010M 0.36 MISC. 74LS1074 0.78 74L0450 10.64 7460195 0.78 746C704 024 746014M 746538 POA 740169 2.35 0.36 746539 POA 740195 741_5109 0.33 741_5461A POA 7460221 2e4 0.58 7460708 0.24 746020M 4.18 0.36 746540 POA 740240 74L01094 0.66 74L0465 2.31 BZY9307V57.40 7460237 0.76 7460710 0.24 746030M 0.36 741_5112 023 74L0467 POA 7460238 0.64 7460711 0.24 746032M 746541 1.98 740241 2.31 1321(93C15 7.40 0.36 7455112A 0.66 7470468 POA 7460240 046 7460714 0.28 7460744 1 95 BZY9301887.40 746543 3.57 745244 0.28 746075M 0.34 74LS113 0.36 741_0469 POA 7460241 0.78 7490120 74F544 P08 740257 1.34 BZY93C20 7.40 74LS1134 0A2 741_8490 POA 7460242 098 7460721 0.28 741-1085WM 0.65 746545 P08 740258 124 BZY93024V7.40 74LS4914 POA 7460727 0.28 746086M 0.36 74L0114 0.36 740260 0.77 BZY93033R7.40 0.98 746547 PO ass 7460243 741_01144 0.40 74LS540 7480244 0.48 746C730 0.28 74HC123AM 0.46 746573 2.78 74S273 2.68 BZ7030120 0.74 0.80 0.46 7460732 0.28 7460125M 741_5122 0.33 741_0541 74110245 746574 2.78 740274 2.66 BZX61C9V20.09 0.48 7472123 0.35 741-S569 POA 74602454 0.54 7480742 048 7460132M 0.42 746579 6.59 740280 1.06 82/C610241/0.09 7460138M 0.38 748604 5.59 740283 2.09 ZENER 74L0125 0.28 74LS573 1.02 741-10251 0.36 7460773 0.38 1.02 DIODES 74LSI 254 0.32 74LS574 7460253 0.52 7460774 0.28 7480139M 0.38 746620 POA 740374 2.31 5.09 0.38 74HC154WM 0.64 741_5126 0.32 400mW 7460257 0.52 748621 POA 74S394 2.31 5.09 74601185 0.54 74HC157M 0.38 746623 POA 74S412 2AV to 75V 74L51264 0.40 74LS592 2.31 0 73 Price: 6p each 741_0132 D.29 74LS5,49'7.2102 7460259 0.52 7460786 0.38 74110161M 0 48 746646 74HC164M 0.48 7460793 0.60 D.35 74h07; 741_5133 ,7,cnc 741-10266 746676 3.22 a48 741_5136 D.78 741-577- 7460273 0.54 74607107 0.40 74601 65M 0.57 746821 POA REGULATORS ZENER DIODES POA 744S137 1.58 741_5621 500mW 7460279 258 741-107109 0.42 7460173M 0.48 746623 POA 78008AP 1.34 74LS622 POA 741_5138 2.34 0.44 2AV to 200V 7460280 0.92 74607112 0.42 7460174M 028 746625 POA 7805 7475139 D.42 74LS623 POA 7480283 0.76 74607123 0.64 7460221AM 0.65 746827 3.32 76054 .68 Price: 6p each 2.10 74HC240WM 055 746841 74607125 0.56 741_01394 D.42 741_5624 0.98 151 700564 74140294 129 POA 74LSI 45 0.66 741_0625 0.88 ZENER DIODES 7806 74410298 278 74607126 0.54 74HC244WM 055 POA 74L0147 POA 741_0626 1.3 WATT 1.34 7460299 1.38 74607132 0.50 74HC245AW 0.62 74AC SERIES 7806 74HC251M 0.42 74607137 0.54 74L0148 0.87 0.72 2.70 to 200V 7460323 1.82 7809 741_0628 1.78 74L0151 ass 0.38 7812 0.68 Price:10p each 7460352 1.20 74607138 0.32 7460259M 0.69 744000 2.25 74607139 0.52 74HC273WM 0.55 744002 7412153 0.36 74L0629 0.49 78124 0.98 P08 74HC367WM 0.53 744004 74LS154 1.23 74L0631 azio 7415 0.84 74607147 0.70 0.68 ZENER DIODES POA 74LS155 0.38 741_0639 aao 7418 7460356 0.84 74607151 0.52 741-10373WM 055 744008 3.0 WAIT 0.72 POA 741_0156 0.38 741_8640 aao 7824 0.72 7.50 to 2700 7460365 0 52 74607153 0.52 74HC374WM 025 744010 74LS640-1 2.79 057 74607154 1.20 7460390M 74L0157 0.42 744011 aao 78L05 7460366 0:62 0.28 p each 74L0641 POA 74607157 0.45 7460393M 053 748C14 74L0158 028 aao 78L054 0.28 PeceI74'DIODES 74607158 0.50 7460540WM 0.76 744020 741_0160 0.52 74LS641-I 2.47 7460368 aao 78LI 2 0.28 0.56 5.0 WATT 74L0642 POA 74607160 0.54 74HC541WM 0.76 74701604 0.60 744032 0.40 781_124 0.28 7460373 0.48 to 200V 74LS161 0 46 74LS642-1 POA 7460374 748074 0.48 78715 a48 74607161 0.54 azs Price:98p each PO4 74LS161A 0.49 741_0643 0.28 74110375 0.78 74607162 0.84 741-10574WM 094 7440109 0.64 7BL24 74LS644 POA ZENER DIODES 7460688WM 0.84 74607163 0.54 74LS162 1.10 7440112 0.81 78L56 7460377 0.52 1.10 0.64 STUD MOUNT 74L01628 1.10 0.70 7460386 0.38 74607164 0.52 74604017M 0.48 748C138 ass 78M05 2.79 20 WATT 74HC4020M 0.48 7440139 0.65 78M058 74L5163 0.40 7460390 0.48 74607165 052 0.70 4.65 75V to 75V 74LS1634 0.64 74L5646 7460393 0.41 74607166 0.52 741-104040M 0.44 7440151 0.68 78M12 0.70 PO4 741_0164 0.40 741_5652 7460423 0.54 74607173 0.52 74604046M 1e8 7440153 ass 76M124 0.70 Price: £7.40 ea' 1.58 74607174 052 741-104060M 0A8 BRIDGE 741_0165 0.50 74L0669 7440157 0.81 78M134 1.40 7460521 POA 0.78 74607175 0.52 741104066W 094 7440150 0.65 78M15 RECTIFIERS 741_8166 0.50 7470670 o 0.94 0.78 POA 74LS168 POA 74L5673 7440163 0.60 78505 1.10 7460534 0.96 0.38 74LSI 69 0.50 7470674 16.89 7460540 7440169 1.98 78012 0 69 74607182 1.20 1.10 746 SERIES 2.62 ' SIL 74LS170 POA 74LS682 7480174 0.65 78015 1.10 7460541 0.69 0.28 7480175 POA 74607191 0.59 74600 0 57 74LSI 73 0.52 74LS683 0.60 7905 7460563 0513 0.88 74802 0.28 3.85 74L81734 0.52 741_8684 7440191 128 79054 0.98 6A/100V OH7460564 0.88 74607192 1.20 74604 028 7440240 74L5685 POA 1.60 0.92 790584 0.68 0.68 74HCT19":52 74606 0.74 74LS686 POA 74L0182 0.33 7440241 0.92 7909 0.98 84/200V OIL 741-105734 0.86 74607194 1.20 74607 0.74 POA 741-107195 1.20 1.96 741_18 POA 741_8687 7440244 0.92 7912 7460574 0.64 0.68 0.28 1.98 74607221 0.66 74608 7440245 1.10 7912A 7475183 POA 741_5688 0.98

TEL 0181-471 9338 TLX 929709 VICOM G FAX 0181-552 0946

45118 4000 SERIES 45128 40008 0.18 4513B 400008 0.18 45146 0.18 4515B 400113 4001UB 0.22 45166 40028 0.18 45178 0.42 4518B 40068 4007UB 0.24 451913 45208 40094E 0.26 4521B 4009UB 0.29 45228

7490589 7460590 7480592 7480593 7460595 7460597 7460620 746C623 7460633 7480640 7460643 7460646 7460648

.

18.432 24 25 & 20"

2K8010R/SIL 0.66 2KBB2OR/SIL 0.70 30MH7 B8001500/Sqr0.35 price: £3.52 ea. B80C1500SIL 0.60 SKB6008/604 POA 32, 66MHz33.33, SKD6008/604PO4 40, 50 632.768, CRYSTALS Price: £4.45 e0. HC49( HC18/U) Freq.MHz 1.843200 2.000000 2.453200 2.457600 3.276800 3.579545 3,686400 4.000000 4.096000 4.194304 4.433619 4.608000 4.915200

1.60 1.66 9.96 1.49

098

Programmable Crystal Oscillators DM -3C SERIES 8pin DIL Plastic

8M4402564Z-10 6.95 M5M4464P-15 MK41169-54 MK45649-15 NMC3764N-15 UPD41464C-12 UPD41464C-15

4.60

0004160-2

3.40

UPD4160-3 UP0446D-1

3e5

no

194 1.60 4.20

420

2.60

STATIC RAM 2114-35 6264LP-10 6264LP-12 62256LP-12 622564P-10 CDM6116AE3 CDM6117AE3 HM1.6116-5 HM3-6116-5 HM6116LP-2 HM6116LP-3 HM6117LP-3 HM62256LP-10 HM6264ALP-12

3.40

2.70 2.70 4.95 4.95 5.30 5.85 4.38 3.60

40106 0.2974042 74F153 0.58HM6264A5P.20 40118 4011UB 40124E 40128 4013B 40148 40158 40168 4016013

40178 40188 40198 40204E 4020B 40218 40220 4023B 402308 40244E 40248 40256

0.28 0.28 0.20 0.22 0.22 0.42 0.42 0.28 0.26 0.38

046 0.28 0.36 0.38 0.40 0.40 0.20 0.23 0.30 0.32

024

402508 ass 0.94 40278 0.30 40286 0.38 4029B 0.39 40308 0.34 1.24 40318 0.70 4032B 40338 0.68 40346 2.10 403513 0.52 40368 2.98 40378 1.27 403813 0.78 4039B 3.22 40408 0.42 4041B 0.48 4041UB 0.48 40428 0.38 40438 0.39 40448 0.39 40458 1.10 404613 0.44 40478 0.44 40488 0.82 40498 0.30 4049UB 0.28 40506 0.28 402613

0.64 0.86 0.60 0.58

4530B 2.2474076 4526E3

45275 452813

45258

4050E17

45318 45328 4534B 45265 45386 45398 45418 45438 45448 45478 45498 45518 45538 45546 45555 45568 45578 45558 45608 45616 4562B 45666 45558 45698 45720B 4573P 4580B 45818 45828 45830

4,640 4,850 45978 45858 45225 47208 4720V 4723B 4724B

1.18 0.86 2.82 1.08 0.60

0,2

0.56 0.57 3.52 3.25 7.50 1.62 2.95

542 4520BT 3.04 0.84 6.98 8.84

40816 4082B 40856 4086B 4089B 40938 4094B 4095B 40556 40978 4098B 40995 4104P 4106B 41606 41610 41638 41745 417513

4194B 4409P 4410P 4411P

454187 1 05 1.02 1 38 454387 0 58 4555137 POA 074 4556B7 1.05 6.60 4585137 0.95 7.40 4010607 0.53

5.82 POA POA POA 0.98 422( (4 9.80 -8 -

4738VP 19.74 475000 28.50 4752VP 29.25 40085 40097 40098 40100 40101

40105 40106 40107 40108 40109 40110 40114 40116 40117 40147 40160 40161

40162 40163 40174 40175 40181 40192 40193 40194 0.70 40195 1.10 40240 2.75 0.84 40245 042 40257

POA 0.68 0.68 POA PGA 1.86 1.14 POA 0.32 0.42 POA 1.24 1.62 3.40 POA POA 1.23 0.92 0.54 0.72 0.72 0.42 0.42 POA

0.74 POA POA POA

44590 44907

74LS283 0.45740907

1.01

0.88 1.40 1 20 1.20 1.20 1.14 1.43 11.05 16.45 21.58

744040 0.1844Z17

008

4.50 4495P 6.55 6.98 4497P 4499P 6.98 45008 15.80 4501UB 0.44 45025 0.56 45036 0.48 4504B 1.36 45055 POA 45068 1.40 450608 1.40 4508B 1.68 45105 0.54

1474560 15.00000/S 16 00000 16.00000/S 14A3200/8 19.66080/S 20.00000/S 22.11840/S 24.00000/0

30.00000/5 32.00000/5 48.00000/S s series

1.02 1.10

0.307200 1.000000 1.843200 2.000000

Freq.= MHz MHz 12, 1A31d18, 16,

15384,19.6608 8 20MHz

1.10 1.10 Price: £3.92 ea. 1.10 1.20 16pIn DIL Plastic 1.02 Package 1.10 1,, 1.20

57 0i0.Frequency 190 102 SPG864049 1.02 0.005 to 600kHz 1.64

SPG8640BN

1.40 0.0083 to 1MHz 121

078 SPG864009 1.00 1.34 1.20 1.10 1.90 1.10 0.92

768kHz

t

560865013N 0.00083 to 100kHz

P00-600

0.005 to 600kHz

1.64 0 All0083 to 1MHz

0.85 Price: £ 9.25 ea. 1.10

1.10 1.10 1.02 1.20 1.10 1.20 1.60 1.68 1.82 1.20 6.99 1 40 1 96

74 SERIES 7400 0.36 7401 0.30 0.32 7402 7403 0.32 7404 0.34 7405 0.34 7406 0.68 7407 0.81 0.37 7408 7409 0.38 7410 0.35 7412 a64 7413 0.76 7414 0.64 7416 0.48

823 6.99

74170 48 74 0.37 74251.10 7426 7427 7430 7432 7437 7436 7440 7442 7445 7446 7447 74474

0.48 0.59 0.35 0.45 0 54 0.46 0.77 0.54

7451

0.57 0.72 0.54 0.38 0.58 0.53 0.64 0.64

7454 7470 7472 7473 7474 7475 7476 7480 7483 7485 7486 7490 7490A

1.12 1.38 0.98 1.40

---

40374 45026 45027 45022

45040 45041

4,100

1.36 0.05

1.34 POA 5.gg

7491 7492 POA 7493 7104 7493A 1.56

pa,

4,105

pa, pa,

45145

13.96

45106

451570211 08 45158P211.08 45155 pa,

45403P P08

7497 74104 74107 74110 74116 74118 74119 74121 74123 74125 74126 74128 74132 74145 74150 74151 74153 74154 74155 74157 74158 74159 74160 74161A 74163 74184 74165 74166 74174

1.26 1.10 0.58 0.53 0.72 0.72 2.56 0.67 0.60 0.60 4.48 0.67 0 60 POA 3.10

P08 POA 1.40 0.88 0.64 0.98 1.42 0.86 1.10 1.86 0.80 0.90 2 80

7460367 0.52ZENER .

74HC573WM 1093.3V

454070 6.4774L0645 454110 POA7470645-1 45406P

3.56

45414P P08 45428

POA

4000 SERIES SURFACE MOUNT 400107 0.32 400207 0.32 4011131

0.32

4011067 0.32 40126T 0.32 401357 0.45 401567 0 84

0.81

0.74 1.57 3.89 0.94 0.74 1.28 1.16 1.57 1 06 1.37

74607181 3.240.94/200VD17

746C7190 0623.0A/200V

7470174 0.3374140573

3.71

2.60 5.75

793

3.95 3.95 HM6267P-35 5.92 HM628128LP-80

1794 HM66204L-12

15.80

KM62256ALP-10 495 LH5164D-10L 2.40 P0D5101P 3.30 UPD43256AGU1OL

833 0PD432560-12

5.60 4.70

UPD4364C-15

OS.P0 OG088635

UVPROMS 270128-25 27C64A-15 270256-15 270256-25 2705120-12 2701000D-12 2704096-12 HM27C1016-20

3.95 3.95 3.95 3.95 6.48

992

to 100k6427010240010

Cal. Tol. 5pprri Price: 0 10.50 ea.

POA 9.80

16.63

4427C64FP-20T 3.40 6427064G-15 5.60 141427C64G-20 560 69462532P 4.50 TDK 0E-0344 5.60 694827128G-25 4.55 27.50 3W5R 15-15 1-19482764G 390 IPL 0.010 23A0 m27164 pi 250 DC to DC

Converters

M5L2732K

1 Watt DC/DC 5V input -,-Output DIL 8 SIL by Newport NMA050555V NMA050959V NMA0512512V NMA0515515V Price: £ 13.0580.

M5427641
300, Slew Rate 60V/uS,

distortion * Aluminium cases * MXF600 & MXF900 fan cooled with D C loudspeaker and thermal protection

USED THE WORLD OVER IN CLUBS, PUBS, CINEMAS, DISCOS ETC

'

SIZES:- MXF200 W1 9"xH3',x" (2U)xD11" MXF400 W19"xH5 \ ." (3U)xD1 2" MXF600 W1 9"xH5 \ ." (3U)xD1 3" MXF900 W1 9"xH5 \ ." (3U)xD143,."

PRICE £81.75 + £5.00 P&P

41.1112Mmimmir:,

..

OMP/MF 450 Mos-Fet Output power 450 watts R.M.S. into 4 ohms, frequency response 1Hz - 100KHz

PRICES:- MXF200 £175.00 MXF400 £233.85 MXF600 £329.00 MXF900 0449.15

-3dB, Damping Factor > 300, Slew Rate 75V/uS, T.H.D. typical 0.001%, Input Sensitivity 500mV, S.N.R. -110 dB, Fan Cooled, D.C. Loudspeaker Protection, 2 Second Anti -Thump Delay. Size 385 x 210 x 105mm.

SPECIALIST CARRIER DEL. 612 50 EACH

OMP X03 STEREO 3 -WAY ACTIVE CROSS -OVER

f:7

Nil

,ff.

T.H.D. typical 0.001%, Input Sensitivity 500mV, S.N.R. -110 dB. Size 330 x 175 x 100mm.

PRICE £132.85 + £5.00 P&P

*

'"'

/V.

'

OMP/MF 1000 Mos-Fet Output power 1000 watts R.M.S. into 2 ohms, 725 watts R.M.S. into 4 ohms, frequency response 1Hz - 100KHz -3dB, Damping Factor > 300, Slew Rate 75V/uS, T.H.D. typical

..

t14-7

-

-

Advanced 3 -Way Stereo Active Cross -Over, housed Ina 19' x 1U case Each channel has three level controls bass, mid & top. The removable front fascia allows access to the programmable DIL switches to &bust the

0.002%, Input Sensitivity 500mV, S.N.R. -110 dB, Fan Cooled, D.C. Loudspeaker Protection, 2 Second Anti -Thump Delay. Size 422 x 300 x 125mm.

I

cross -over frequency: Bass -Mid 250/500/1300Hz MId Top 1 13/3/5KHz, all at 24dB per octave Bass invert switches on each bass channel. Nominal 775mV input/output Fully compatible with OMP rack amplifier and modules

PRICE £259.00 + £12.00 P&P

i..

Price £117.44 + £5.00 P&P .

z

NOTE: MOS-FET MODULES ARE AVAILABLE IN TWO VERSIONS: STANDARD - INPUT SENS 500mV, BAND WIDTH 100KHz. PEC (PROFESSIONAL EQUIPMENT COMPATIBLE) - INPUT SENS 775mV, BAND WIDTH 50KHz. ORDER STANDARD OR PEC.

* ECHO & SOUND EFFECTS*

.

1/

STEREO DISCO MIXER with 2 x 7 band L & R graphic equalisers with bar graph

....

LOUDSPEAKERS LARGE SELECTION OF SPECIALIST LOUDSPEAKERS

MANY OUTSTANDING FEATURES:- including Echo with repeat & speed control, DJ Mic with talk -over LED Vu meters.

AVAILABLE, INCLUDING CABINET FITTINGS, SPEAKER

GRILLES, CROSS-OVERS AND HIGH POWER, HIGH

switch, 6 Channels with individual faders

FREQUENCY BULLETS AND HORNS, LARGE (A4) S.A.E. (60p STAMPED) FOR COMPLETE LIST. McKenzie and Fane Loudspeakers are also available.

plus cross fade, Cue Headphone Monitor. 8

Sound Effects. Useful combination of the

following inputs, 3 turntables (mag), 3 mics, 5 Line for CD, Tape, Video etc.

Price £144.99 + £5.00 P&P

EMINENCE:- INSTRUMENTS, P.A., DISCO, ETC

SIZE: 482 x 240 x 120mm

PIEZO ELECTRIC TWEETERS - MOTOROLA

ALL EMINENCE UNITS 8 OHMS IMPEDANCE

TYPE

12" 100 WATT R.M.S. ME12-100LT (TWIN CONE) WIDE RESPONSE, P.A., VOCAL, STAGE

8" 100 WATT R.M.S. ME8-100 GEN. PURPOSE, LEAD GUITAR, EXCELLENT MID, DISCO. Join the Piezo revolution! The low dynamic mass (no voice coil) of a Piezo tweeter produces an improved RES. FRED. 72Hz, FREQ. RESP. TO 4KHz, SENS 97dB. PRICE 032.71 + C2.00 P&P transient response with a lower distortion level than ordinary dynamic tweeters. As a crossover is not required 100 WATT R.M.S..ME110 GUITAR, VOCAL, KEYBOARD, DISCO, EXCELLENT MID. these units can be added to existing speaker systems of up to 100 watts (more if two are put in series. FREE RES. FRED. 71Hz, FREQ RESP. TO 7KHz, SENS97dB. these PRICE C33.74 + C2.50 P&P EXPLANATORY LEAFLETS ARE SUPPLIED WITH EACH TWEETER. 10" 200 WATT R.M.S. MEIO-200 GUITAR, KEYB'D, DISCO, VOCAL, EXCELLENT HIGH POWER MID. TYPE 'A' (KSN1036A) 3" round with protective wire mesh. Ideal for RES. FREQ. 65Hz, FREQ. RESP. TO 3.5KHz, SENS 99dB. PRICE 043.47 + £2.50 P&P -... wp, 12" 100 WATT R.M.S. ME12-100LE GEN. PURPOSE, LEAD GUITAR, DISCO, STAGE MONITOR. s' bookshelf and medium sized Hi-Fi apeakers. Price £4.90 + 50p P&P. PRICE C35.64 + C3.50 P&P TYPE 'B' (KSNI005A) 3Y," super horn for general purpose speakers, RES.FRED. 49Hz, FRED. RESP. TO 6KHz, SENS 100dB.

disco and P.A. systems etc. Price C5.99 + 50p P&P. TYPE 'C' (KSN1016A) 2"x5" wide dispersion horn for quality Hi-Fi systerns and quality discos etc. Price £6.99 + $0p P&P.

TY

-----....../'-vi.

TYPE 'D' (KSN1025A) 2"x6" wide dispersion horn. Upper frequency TYPE D.

response retained extending down to mid -range (2KHz). Suitable for high quality Hi-Fi systems and quality discos. Price £9.99 + 50p P&P. TYPE 'E' (KSN1038A) 34." horn tweeter with attractive silver finish trim. Suitable for Hi-Fi monitor systems etc. Price £5.99 + 50p P&P. LEVEL CONTROL Combines,on a recessed mounting plate, level control and cabinet input jack socket. 85x85mm. Price 04.10 - 50p P&P.

TYPE E

sr

l

TYPED

PRICE 036.67 - C3.50 P&P

MONITOR. RES. FREQ 42Hz, FREQ. RESP. TO 10KHz, SENS 98dB.

+MID. 12" 200 WATT R.M.S..ME20 GEN. PURPOSE, GUITAR, DISCO, VOCAL, EXCELLENT MID.

PRICE C46.71 63.50 P&P 12" 300 WATT R.M.S ME12-300GP HIGH POWER BASS, LEAD GUITAR, KEYBOARD, DISCO ETC. PRICE C70.19 + C3.50 P&P RES. FRED. 47Hz, FRED. RESP. TO 5KHz, SENS 103dB. 15" 200 WATT R.M.S. M E15-200 GEN. PURPOSE BASS, INCLUDING BASS GUITAR. PRICE C50.72 , C4.00 P&P RES. FRED. 46Hz, FRED. RESP. TO 5KHz, SENS 99dB. 15" 300 WATT R.M.S. ME15-300 HIGH POWER BASS, INCLUDING BASS GUITAR. PRICE £73.34 - C4.00 P&P RES. FREQ. 39Hz, FREQ. RESP. TO 3KHz, SENS 103dB.

RES. FRED. 58Hz, FREQ RESP. TO 6KHz, SENS 98dB.

EARBENDERS:- HI-FI, STUDIO, IN -CAR, ETC ALL EARBENDER UNITS 8 OHMS (Except 508-50 & EB10-50 which are dual impedance tapped ,c,,, 4 & 0 ohm)

e

11

II

111

BASS, SINGLE CONE, HIGH COMPLIANCE, ROLLED SURROUND 8" 50watt EB8-50 DUAL IMPEDENCE, TAPPED 4/8 OHM BASS, HI-FI, IN -CAR. RES. FRED. 40Hz, FRED. RESP. TO 7KHz SENS 97dB. PRICE £8.90 - C2.00 P&P

:

A new range of quality loudspeakers, designed to take advantage of the latest speaker technology and enclosure designs. Both models utilize studio quality

10" 50WATT EB10-50 DUAL IMPEDENCE, TAPPED 4/8 OHM BASS, HI-FI, IN -CAR. RES. FRED. 40Hz, FRED. RESP. TO 5KHz, SENS. 99dB. PRICE 013.65 - C2.50 P&P

12" cast aluminium loudspeakers with factory fitted grilles, wide dispersion constant directivity horns. extruded aluminium corner protection and steel ball corners, complimented with heavy duty black covering. The enclosures are fitted as standard with top hats for optional loudspeaker stands

10" 100WATT'EB10-100 BASS, HI-FI, STUDIO.

)

POWER RATINGS QUOTED IN WATTS RMS FOR EACH CABINET FREQUENCY RESPONSE FULL RANGE 45Hz - 20KHz

MI FC 12-100WATTS (100dB) PRICE £159.00 PER PAIR ibl FC 12-200WATTS (100dB) PRICE £175.00 PER PAIR SPECIALIST CARRIER DEL. E12&0 PER PAIR

OPTIONAL STANDS PRICE PER PAIR £49.00 Delivery £6.00 per pair

IN -CAR STEREO BOOSTER AMPS

NE

0

0

RES. FREQ. 26Hz, FREQ. RESP. TO 3KHz, SENS 93dB.

5 \ ." 60 WATT EB5-60TC (TWIN CONE) HI-FI, MULTI -ARRAY DISCO ETC. RES. FRED. 63Hz, FREQ. RESP. TO 20KHz, SENS 92dB. PRICE 09.99 + £1.50 P&P 6',a" 60WATT EB6-60TC (TWIN CONE) HI-FI, MULTI -ARRAY DISCO ETC. RES. FRED. 38Hz, FREQ. RESP. TO 20KHz, SENS 94dB. PRICE 010.99 + 1.50 P&P 8" 60WATT EB8-60TC (TWIN CONE) HI-FI, MILTI-ARRAY DISCO ETC. RES. FRED. 40Hz, FRED. RESP. TO 18KHz, SENS 89dB. PRICE 012.99 - £1.50 P&P 10" 60WATT EB10-60TC (TWIN CONE) HI-FI, MULTI ARRAY DISCO ETC. RES. FRED. 35Hz, FRED. RESP. TO 12KHz, SENS 98dB. PRICE 016.49 - C2.00 P&P

;11 del:I:vim 0

Features: * Stereo, bridgable mono * Choice of & low level inpouts * L & R level controls * Remote * Speaker & thermal Protectih \n-olf

VERY SENS FET MIC, RANGE 100-300m, SIZE 56 a 46mm, SUPPLY 9V BATTERY.

ApEk PRICES INCLUSIVE OF V.A.T. SALES COUNTER. VISA AND ACCESS ACCEPTED BY POST, PHONE OR FAX.

PRICE 042.12 + C3.50 P&P

FULL RANGE TWIN CONE, HIGH COMPLIANCE, ROLLED SURROUND

111112pija IA '

MOTE% AHOADIAR2V1011.3ELFI, ORDER £1.00 MIIEVE"1.0.7.71g:

ELEKTOR ELECTRONICS APRIL 1995

12" 1 OOWATT EB12-100 BASS, STUDIO, HI-FI, EXCELLENT DISCO.

THREE SUPERB HIGH POWER O BOOSTER AMPLIF IERS CAR 150 WATTS (75 r 75) Stereo, 150W Bridged Mono 250 WATTS (125 - 125) Stereo, 250W Bridged Mono 200) Stereo, 400W 400 WATTS (200 Bridged Mono ALL POWERS INTO 4 OHMS -

PRICES: 150W 049.99 250W £99.99

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Tel.: 0702-527572 Fax.: 0702-420243

20

FOCUS ON: MICROCONTROLLER DEVELOPMENT SYSTEMS In this day and age, it is difficult, if not impossible, to think of electronics without microcontrollers. This article discusses some of the development tools marketed for the more popular microcontrollers. These tools fall into three categories: hardware only, software only, and mixed hardware/software. Simulator Bronz Edit

Display

sien

60

Please mention ELEKTOR ELECTRONICS when contacting advertisers 4 watt FM transmitter, small but powerful transmitter, 3 RF stages, microphone and an audio preamp include in kit. £23.50 Kit no 1028.

3 Channel light chaser, 800 watts per channel, speed and direction controls supplied with 121eds and mains friars, so you can use mains light bulbs if you want. 9-15vdc £19.97 Kit no 1026.

Mini metal detector, suitable for locating pipes in walls etc, range 15-20 cm, complete with case. 9v operation. £9.40 Kit no 1022.

A mini FM transmitter, very high gain preamp, supplied complete with FET electret microphone.

Designed to cover 88-108 Mhz but it is easy to change it to cover 63-130Mhz- Works with a common 9v (PP3) battery.0.2W RF. £8.22 Kit no 1001.

25 watt FM transmitter 4 RF stages, preamp required (our kit 1068 is suitable). Due to the

is,;;;11

complexity of the transmitter it is supplied in built up form only. £29.37 Kit no 1031.

6

as

800 watt single channel sound to light kit, mains operated, add rhythm I o your party for only £9.40 Kit no 1006. 12v flourescent.A useful kitthat will enable you to

light 4' ffourescent tubes from your car battery! (you will also need a 9v 2A transformer, not supplied) £9.40 Kit no 1069.

Electronic siren kit with an impressive 5 watt power output. Ideal for car/bike alarms etc. 6-

611

12vdc, max current 1A, tone frequency 1.2khz. £7.05 Kit no 1003. Strobe light, adjustable frequency from 1- to 60 Hz (a lot faster than conventional strobes) mains operated. 118.80 Kit no 1037.

VOX switch, sound activated switch idealfor turn-

Sound effects generator, produce sounds ranging from bird chips to sirens, complete with speaker, add sound effects to your projects for just £10.57 Kit no 1045.

ing tape recorders on and off when sounds are heard. Makes the tape last a lot longer! adjustable sensitivity, built in delay. £9.40 Kit 1073.

3-30v Power supply, variable, stabilized power supply for laboratory use. Shortcircuit protected, suitablefor professional or amateur applications.

Ultrasonic radar ideal as a movement detector

24v 3A transformer is also needed to complete the kit. £16.45 Kit 1007.

with a range of about 10 metres, automateyour cat flap! 12v operation so ideal for cars, caravans etc.

Guitar preamp with tone controls, small enough to fit inside any guitar, based on TL082 IC, 9-12vdc, 50mA. £9.40 Kit no 1091.

£16.45 Kit 1049.

Incar soundto light, Put some atmosphere in your car with this mini 3 channel sound to light Each channel has 6 led's. £11.75 Kit no 1086.

1

Powerful 1 watt FM transmitter supplied complete with piezoelectric microphone. 8-30vdc. At 25-30v you will get nearly 2 watts, £14 10 Kit no

Liquid level detector useful for detecting fluid

1009.

alarm. Will switch 2A mains. £5.87 Kit no 1081.

Tc

levels intanks, fishponds, baths or as a rain or leak

15 watt FM transmitter, 4 stage high power,

s.171,

preamp required. 12-18vdc. Can use either ground plane, open dipole, or Y agi. Supplied in built form only at £81.07 Kit 1021.

7 watt HI Fl power amplifier useful, powerful, ideal for intercomms audio systems, car use etc. 12-18vdc 500mA. £8.22 Kit No 1025.

1

FM/AM Scanner, well not quite you have to turn the knob yourself but you will hear things on this radio (even TV) that you would not hear on an ordinary radio!. Receiver covers50-160Mhz both AM and FM. Built in 5 watt amplifier. £17.62 Kit

t

Sit,4

.11 Mt

Combination lock 9 key, easily programmable, will switch 2A mains. Complete with keypad. 9v

Telephone amplifier, Very sensitive amplifier

operation. £11.75 Kit 1114.

you follow a conversation without holding the

which uses a 'phone pickup coil (supplied) will let phone. £12.92 Kit no 1059.

P1

no 1013.

TOP 10 BEST SELLING KITS CORNER Phone call relay, useful device that operates a relay

'

when ever the 'phone rings, could be used to operate more bells or signalling lights etc. Will switch mains at 2A- £11-75 Kit no 1122.

1. Variable speed control kit for 12v DC motors up to 30A! (you may need a heatsink for 30A) £19.97. 2. Composite video kit, converts composite signals into separate H sync, Vsync and video £9.40.

3. Geiger counter kit, contains everything you need to build a working counter £22.32. 4. Solar energy kit, contains a solar panel, motor, buzzer and cable for experiments £5.87.

No 1/30 bay! Runs for about a month on a 1.5v battery.

Phone bug detector, this device will warn you if somebody is eavesdropping on your phone line.

£8.22 Kit no 1015.

£7.05 Kit no 1130.

Mosquito repeller, modern way to keep midges at

--

5. Electronic accupuncture kit, may help with

so.,,. ..8

migrane, poor circulation, backache etc. £8.22.

Lead acid charger, two automatic charging rates, visual indication of battery state, ideal for alarm systems, emergency lighting etc. 100mA 12vdc. £14.10 Kit no 1095.

waft r

adapter. If and tools and glue required.

operated, separate sensitivity adj ustment f or each

0

Robot voice, interesting circuit that distorts your voice! adjustable, answer the phone with a different voice! 12vdc £10.57 Kit no 1131.

or

Telephone bug, small bug powered by the telephone line, starts transmitting as soon as the

8. Nicad charger kit automatic charger for cell from 1.2v to 15v, 7 settings 50600mA, transformer required 18-20v 600mA. £9.40. 9&10. Inverter kits, produce 240vac from a 12vdc

Car alarm system, works on voltage drop and/or

supply, two versions are available a 15w one at

vibration, entry and exit delays plus adjustable

£14.10, and an 80w version at £23.50.

alarm duration. Good for cars, caravansetc. £14.10

EXPRESS. COMP ENTS

Kit no 1019.

handset is picked up! £9.40 Kit no 1135.

Motorbike/cycle trembler alarm, adjustable sensitivity, preset alarm time, auto reset. Could be connected to bikes horn etc. £14.10 Kit no 1011

I

I Portable alarm system, based on a mercury switch.

The alarm continues to sound until the unit is disabled by the owner. Buzzer included. £12.92 Kit no 1150. function generator, produces sinusoidal, sawtooth

6

tI

and square waves adjustable from 20hz-20khz, separate level controls for each shape. Will pro. duce all 3 together 24vac £17 62 Kit no 1008 0-5 minute timer, adjustable from 0 to 5 mins, will switch up to 2A mains. Perfect for alarms, photographic laboratoriesetc. 12vdc. £8.22 Kit no 1020.

adjustable high tension of 80-300v from a 9v battery, ideal for catching worms etc! £9.40. 7. Adapter bug kit, contains everything you need to build a professional bug built inside a standard 13A mains adapter, the bug is mains powered so it operates all the time the adapter is plugged in.

Price is £16.45 for the complete kit including

3 channel wireless sound to light system, mains channel, 1,200 watt power handling. Microphone included. £16.45 Kit no 1014.

6. Electrifying apparatus kit, produces a weak

0'1 Preamp mixer, 3 input mono mixer, separate bass

and treble controls plus independent level controls 18s dc, input sens 150ms 100mA £1762 Kit no 1052

how to order Remember to add £1.50 p&p. By phone with a credit card. By post with either a cheque, postal order or credit card details. By fax with credit card details. EXPRESS COMPONENTS, PO BOX 517 HOVE SUSSEX BN3 5QZ. DEPT EL TEL 01273 771156 FAX 01273 206875 Overseas orders please add £3.50 ost and packin!.

ELEKTOR ELECTRONICS APRIL 1995

61

Please mention ELEKTOR ELECTRONICS when contacting advertisers

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S e 0°4 0,-

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Typical

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Application

PIC 16Cxx Programmer BackDraft 17 ClearView '5x

20

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Lit 1-1

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leatir

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1....0 .D

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All prices exclude VAT and £3 shipping per order. For further details on any of these products please 'phone for our new colour catalogue. I

'

-

The new schematic capture program

Geswin (GESECA for Windows)

fik

Edit

Yin.,

-

I

12,11+

11.

Window

lias

ueaitugjjimpt:Eagi:Nkftisi:CQNNT-mom mom

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(3> -EXAMMESWRRECT S

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adds more than a pretty face to

Co1

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10

Geswin DDE links with SpiceAge to provide instant circuit editing. Because this link enables SpiceAge

to retain all its simulation settings, the schematic (produced by Geswin) is uncluttered so that you

..1:1:1.;:::::::

can create clean drawings that may be clipboarded into your other Windows applications.

You can clipboard sections of your netlist from SpiceAge back into Geswin's attribute Inspector if you wish to use patches of existing circuits. Geswin has inherited GESECA's speed and ease of

use. You will find it's best -loved "bucket of bits" components' store waiting for your instant use from a special self -replenishing window. The SpiceAge component library has been expanded and re -drawn into "stubbies". The new symbols allow more components to fit within a given screen area without compromising clarity. Multiple windows allow you to scratch pad your designs (simulating as you work) and clipboard them into a fair copy window. File compatible with GESECA: schematics and components from GESECA may be read. Comprehensive HELP provides reference material; tutorial style manual reassures you of your own intuition. Geswin automatically invokes (or switches to) SpiceAge; you can also invoke Geswin from SpiceAge.

Please contact Those Engineers Ltd, 31 Birkbeck Road, LONDON NW7 4BP.

Tel 0181-906 0155, FAX 0181-906 0969. *upgrade price from GESECA; £295 + VAT new ELEKTOR ELECTRONICS APRIL 1995

LuillaDm

Mmem®To

62

and the observer. An example is the

BAT DETECTOR

change in frequency of the sound heard when a train or aircraft is moving towards or away from an observer.

Interference is the interaction be-

Design by L. Lemmens

tween two or more waves of the same frequency emitted by a coherent source. The wavefronts are combined according to the principle of superposi-

tion. In the case of the bat, the two

waves are the emitted sound and that of the echo, which are combined in the ear of the bat.

Bats are very useful animals that cause no damage, harm no one, and are protected by law. They, and a number of birds, keep the insect population

under control. For instance, a single bat consumes no fewer than 60 000 mosquitos during the summer. A bat has to eat a lot during the warmer season, because it loses about 25% of its

body weight during hibernation. We should leave these interesting little ani-

mals in peace and quiet during their hibernation and also in spring when they are busily feeding and looking after their young family.

Nevertheless, the present detector

can be used to study them during spring and summer: most bats can be heard at distances of 20-30 m (65-90 ft). This is not surprising when

The detector makes sounds at frequencies of 10-300 kHz audible to human beings. The conversion is caried out either by a superheterodyne circuit or a frequency divider. Although it enables listening to bats, and a number of other mammals, as well as insects, the detector is particularly useful for testing ultrasonic alarm equipment.

it is realized that some species emit ul-

trasonic sounds at a level of 100 dB (which is equivalent to that of a pneumatic hammer).

The divider in the detector enables the entire range of 10-300 kHz to be monitored, but it has the disadvantage of 'losing' the original waveform; only the frequency information is retained. However, the superheterodyne section of the detector leaves the original wave-

Human beings can only hear sounds in the frequency range of 20 Hz to 20 kHz and even that depends on age.

the insect, while the CF tones serve to determine the relative speed with re-

There are many animals that have a much wider range of hearing: bats, dolphins and whales, for instance, can hear sounds at frequencies up to 200 kHz. The hearing range of man, some mammals and a few insects is given in Fig. 1.The vocal range is normally rather narrower: 70-80% of the hearing range.

turned by the insect also contain infor-

form intact, but can scan the fre-

insect. The measurements made by the bat depend on two well-known physical phenomena: the Doppler effect and in-

Circuit description

terference.

The electret microphone in the circuit

The ultrasonic sounds made by bats and dolphins are not so much used to communicate (at least not as far as sci-

entists are aware of), but rather as a means of navigation similar to man's

spect to the insect. The echoes re-

mation about the speed at which the quency range only in segments 15 kHz insect moves its wings; from this, the wide. Also, the superheterodyne secbat can determine the type and size of tion is more sensitive than the divider.

The Doppler effect is the apparent

of Fig. 2 picks up the ultrasonic

change of frequency caused by the relative motion of the source of radiation

which obtains its power supply via R1

radar and sonar systems. Bats emit short bursts of ultrasonic

audible frequency range [kHz]

tones to orient themselves and to lo-

0

cate food in the form of insects. These

20Hr

tones may be of constant frequency (CF) or they may vary in frequency, that is, be frequency modulated (FM).

Some species of bat emit an 83 kHz burst of CF tones that are frequency modulated when they die out. Each tone lasts 30-40 ms. Another species emits frequency -modulated pulses that fall in frequency from 60 kHz to 30 kHz in 10 ms. The FM tones are used by all

species to determine the distance to

sounds. It has an integral amplifier,

10 1

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

2? 1

man 200kHz

bat 7kH2

shrew 4kHz

200kHz

dolphin 5kHz

locust 3kHz

cricket

936046X-13

Fig. 1. Hearing range of man, some mammals an a few insects. ELEKTOR ELECTRONICS APRIL 1995

sensitivity

Mid MCE2500

10k

P1

10n

C2

MCE2500

BB212

B

BC550C

V

0

0

r

L1

R14

R13

6

5V

5

5

2 x 66212

R17

10n

33n D1

C17

Ulm

C1 5

NM

I

rs.,0

FL1

BFB455A BFK455K BFK455

um NI=

frequency

R23

10k

P2

R22

3

3

6

-

01 02

9

12

?

in

C18 NEM

:100n

4024

CT

2

1

0

:100n

CT=0

'Cl

CTR7

100n

130

L19

N

14

id,

L16

R16

R15

n

1312

LPCS4200A

NE612

1C3

BC550C

100n

Z10

o-

1,:too 0

S3

1C4

L2 *

33n

C21

8

MiC24 1.212n

1n8

R19

25V

1100µ

127

volume

Tn7

C25

LOG.

MI=

CM EMI

R18

* see text

C23

470p

C22

220n

C20

100n

C1,

mlm

LPCS4200A

NE612

R21

bottom view

LPCS4200A

6

TDA7052

105

5Ve

936046X-11

0

0

C28

64

GENERAL INTEREST IC2

0 C-11 ooll 10 0 0++

+

[ket000 00 C

D

B

C26

Ls1

C27

C5 11

40V51I°

O

R22

si4

Ca

C17

cc

o-0-0 cjell

C2

1

C16

C22

C20

C1911'

C29 C9

-op ono°

R9

T2

671 C6 C7

C10

C11

R R21

-O

0-71\:\")p

6a 00 -no 0 S3 04 03 5

rdy3,c) if) 22.,k itkA, cc

o

C21

ev

R8

R6

0 0

0111-00

936049

C1

Et C23

134.1

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76657

C14 FL1

0 siah,%-oa

fai L2

N um

R20 2

936046

Rig .,8"

C

R19

2A1S2

28

F

ft ft

ncs-'10E-

O2 O1

sl

0 ce°

L

Fig. 3. Printed -circuit board for the bat detector.

and P1. The output of the microphone is applied to a two -stage preamplifier, T1 and T2, via sensitivity control P1. The values of C1 -C7 and C9 are small to ensure that frequencies below about 10 kHz (which are of no interest in the present application) are not magnified by the preamplifier. In other words, the

preamplifier functions as an active high-pass filter, so that all frequencies

in the wanted range are of about the same level.

As stated earlier, the detector provides two different means of converting

ultrasonic sounds into audible ones: division and superheterodyning. Each has its own circuitry and the output of the preamplifier is, therefore, applied

based on IC3 and IC4. In IC3, the output of T2 is converted to a fixed intermediate frequency, i.f., of 455 kHz. not so high that the circuit reacts to This, in conjunction with bandpass filter FL1, makes it simple to extract the the ever-present ambient noise. The frequencies of the signal applied wanted signal from the spurious ones to IC1 are divided by a number of cas- and noise. caded binary scalers. Although IC1 has To obtain a difference frequency of seven outputs, only those that give a 455 kHz, the 10-300 kHz input signals scaling factor of 4, 8, 16 or 32 are used are mixed with the output of a Colpitts inputs the signal at pin 1 of IC1 is sufficient for the proper operation of the divider. At the same time, the gain is

and selected with S3. For instance, oscillator that covers the frequency with S3 in position 4, an ultrasonic range of 465-755 kHz. Associated with input of 32 kHz is divided by 32 and the oscillator are inductor L1 and varactors D1 and D2. If, for instance, the

thus converted to a 1 kHz tone.

The output of IC1 is applied to a.f. amplifier IC5 via attenuator R21.

The superheterodyne section is

incoming signal is 100 kHz, the oscillator in IC3 must be tuned to 555 kHz to obtain a difference frequency of

to two different sections in Fig. 2.

The section around T3 and IC1 is a

frequency divider. The gain of T3 (20 dB), determined by the ratio

1215:R16, ensures that even with weak gi.04,410 4024

NE612

INPUT A

40s.

INPUT B

.411160

*100114

OUTPUT A

TDA7052 4805

936046X-12

).0

Fig. 4. Pinouts of the integrated circuits.

I',

Fig. 5. Completed prototype printed -circuit board. ELEKTOR ELECTRONICS APRIL 1995

BAT DETECTOR

65

455 kHz. The reason that of each of the

two dual varactors only one half is

used is that it enables constructors to use a lower inductance for L1. In that case, the oscillator frequency range lies somewhat higher; the second half of D2

should then be connected in parallel with the other half to pull the range down again.

When the voltage across the varactors is a minimum, the capacitance is a maximum and the oscillator generates its lowest frequency (465 kHz). Turning P2 to the position where the resistance between the wiper and junction R22 -P2

is minimum, the oscillator generates its highest frequency (755 kHz). Inductors L1 and L2 are 455 kHz i.f.

transformers of which only the two outer windings are used. The integral

parallel capacitor in both should be disabled by gently pushing a small screwdriver through its centre.

The 455 kHz signal is, of course,

Fig. 6. completed prototype with top cover removed.

still not audible and it is, therefore, applied to a second mixer, IC4. The frequency of the oscillator in this stage is determined by L2 -C22 -C23. This is tuned to 452 kHz or 458 kHz in order

to produce a 3 kHz tone (normal

human hearing is at its most sensitive at this frequency). In the prototype, a frequency of 452 kHz was preferred since this ensures that when the input frequency rises, the audio output also

BAT DETECTOR

rises. The 3 kHz signal at the output of IC4

(pin 5) is applied to a.f. amplifier IC5

FREQUENCY ILLUAl.

COUNTDOWN

via double low-pass filter R18 -C24 and R19 -C25. This filter also removes the higher harmonics from the rectangular output of the divider. Potentiometer P3

SUPERHET

is the volume control. The amplifier chip contains a driver stage and an output stage, which can drive a small

ED

VOLUME

8

- 16

SENSITIVITY

4.04"""7***.;- 32

\.

ED

loudspeaker or headphones.

Power for the detector is obtained from a 9 V (PP3 = 6F22) battery. The 5 V line is derived from this battery by

6

regulator IC2. Although low -drop Type

-mg

7805 can be used, but the battery voltage should then not be allowed to drop

4805 is preferred, a standard Type below 8 V.

Switch S1 serves to select 'division' or 'superheterodyne' operation.

POWER oav

000 00 00

00 000 0°0

0 OFF

Push-button switch S4 serves to switch on D3 which functions as PHONES

0° 0 0 0 °O 0000 00

Fig. 7. Suggested front panel layout (scale 8:10). ELEKTOR ELECTRONICS APRIL 1995

pointer and illumination for the frequency scale around P2. The LED in

the D3 position (and its series resistor) may be replaced by a small bulb from an alarm clock.

Construction The detector is preferably built on the printed -circuit board shown in Fig. 3. As usual, first mount the passive components, then the inductors and lastly the semiconductors and integrated circuits. It may be necessary when alter-

66

GENERAL INTEREST

native types of inductor are used to

the oscillator frequency was 755 kHz.

drill out some of the relevant holes in the board. A photograph of the completed board is shown in Fig. 5. The prototype detector is housed in

If these results can not be obtained, the oscillator frequency is almost certainly too high. This may be remedied by lowering the value of R23 (down to

a 188x 120x57 mm (73/8x43/4x21/4 in)

0 SI if need be). If this still does not give

seen, a somewhat smaller enclosure

should be used to determine at which frequency the oscillator does work and

metal enclosure-see Fig. 6. As is the desired result, a frequency meter may do just as well.

The frequency scale in Fig. 8 is intended to be glued around the hole for the frequency control. Note that this is

over what range it can be tuned.

Note that although the calibration may be carried out by ear, it is always

just an example, since tolerances of better to do it with the aid of a frethe oscillator in IC3 may make the po- quency meter. Couple this meter sitions slightly different. A calibrated scale is readily made with the aid of a frequency meter and/or signal genera-

loosely to L1 or L2 via a 10-100 pF capacitor. Adjust the core of the relevant

tor.

quency.

inductor to obtain the correct fre-

The microphone may be mounted in

a side of the enclosure or used as a separate entity connected to the detector by a length of screened audio cable.

Note that the jack socket for the headphones must be insulated from the enclosure by nylon washers and a nylon bush to prevent pins 5 and 8 of IC5 being shorted to chassis.

Parts list Resistors: R1, R6, R11, R16 = 1 IcS2

R2, R7, R13 = 150 k52 R3, R8, R14 = 27 kS2 R4, Rg, R12, R24 = 47- SI R5, R15, R17 = 10 IcS2 R10, R18 = 4.7 lc,C2

Calibration

R19 = 22 kI2

Connect the 9 V battery to the detector and switch on the supply with S2. Turn P3 clockwise, when noise should become audible from the loudspeaker (or headphones). When SI is changed over, the noise level should increase or de-

R21 = 100 kS/ R22 = 8.2 kQ

crease (there is more noise when the

Capacitors:

superheterodyne section is on).

C1, C3, C4, C6, C7, C10-C13,C16, C19,

Set S1 to COUNTDOWN and P1 to max-

imum sensitivity. Rattle a set of keys in

front of the microphone; this should produce a fairly loud noise in the loudspeaker. With the detector near an operating

TV receiver or computer monitor, a continuous whistle should be heard from the loudspeaker (try all positions of S3). This is because the deflection coils or the line transformers in a TV

receiver emit a continuous tone of

(73/8x43/4x21/4 in) metal

Bt1 = 9 V battery with clip PCB Order No. 936046 [936046]

R23 = 1.8 k4 (see text) PI, P2 = 10 k4, linear P3 = 4.7 Ica logarithmic

C30 = 100 nF C2, C5, Cg, C17 = 10 nF C8, C27 = 100 pF, 25 V, radial C14, C18, C26 = 1 nF C15, C21 = 33 nF C20 = 220 nF C22 = 470 pF C23 = 1.8 nF C24 = 22 nF C25 = 4.7 nF

C28 = 47 pF, 16 V, radial

Inductors:

former is used in the L2 position, adjust the inductance with a frequency

L1 = LPCS4200A/93309 (Toko = Cirkit) L2 = as L1 or 452 kHz ceramic filter.

meter as described later for Llor by listening to the loudspeaker: when L2 is

Semiconductors:

Note: if i.f. transformers are used, see text about disabling the integral capacitor.

DI, D2 = varactor Type BB212 D3 = LED, yellow

then to high again. The correct setting is at the low tone. If a 452 kHz ceramic

T1 -T3 = BC550C

resonator is used in the L2 position,

Integrated circuits:

this adjustment is not necessary. Turn P2 to check whether the oscillator in IC3 can be tuned to 455 kHz. At that point, a whistle going from high to low and then to high again becomes

ICI = 4024 IC2 = 4805 (or 7805 - see text) IC3, IC4 = NE612 (or NE602) IC5 = TDA7052

audible. In the prototype, this hap-

Miscellaneous:

pened with P2 completely anticlockwise and the core of L1 almost at its top po-

Si = double -pole change -over switch S2 = single -pole on/off switch S3 = single -pole, four -position (rotary)

sition. With P2 completely clockwise,

switch S4 = push-button switch with make contact Mici = electret microphone Flt = 455 kHz i.f. filter Ls1 = loudspeaker, 8-16 SI, 200 mW K1 = jack socket with break contact Enclosure 188x120x57 mm

R20 = 1004

15 625 Hz; that of a computer monitor is normally somewhat higher. If the divider works correctly, set Si to SUPERHET. If a 455 kHz i.f. trans-

adjusted, the noise increases and its tone changes from high to low and

Fig. 8. Suggested frequency scale for P2.

ELEKTOR ELECTRONICS APRIL 1995

67

Please mention ELEKTOR ELECTRONICS when contacting advertisers

SURVEILLANCE PMWESSI4EVAL 01 JA LITY KITS Whether your requirement for surveillance equipment is amateur, professional or you are just fascinated by this unique area of electronics SUMA DESIGNS has a kit to fit the bill. We have been designing electronic surveillance equipment for over 12 years and you can be sure that all our kits are very well tried, tested and proven and come complete with full instructions, circuit diagrams, assembly details and all high quality components including fibreglass PCB. Unless otherwise stated all transmitters are tuneable and can be received on an ordinary VHF FM radio.

Genuine SUMA kits available only direct from Suma Designs. Beware inferior imitations! UTX Ultra -miniature Room Transmitter Smallest room transmitter kit in the word! Incredible 10mm x 20mm including mic. £16.45 3-12V operation. 500m range MTX Micro -miniature Room Transmitter Best-selling micro -miniature Room Transmitter Just 17mm x 17mm including mic. 3-12V operation. 1000m range

£13.45

STX High-performance Room Transmitter Hi performance transmitter with a buffered output stage for greater stability and range. £15.45 Measures 22mm x 22mm including mic. 6-12V operation, 1500m range VT500 High -power Room Transmitter

Powerful 250mW output providing excellent range and performance. Size 20mm x £16.45

40mm. 9-12V operation. 3000m range

VXT Voice Activated Transmitter Triggers only when sounds are detected. Very low standby current. Variable sensitivity and delay with LED indicator. Size 20mm x 67mm. 9V operation. 1000m range £19.45 NVX400 Mains Powered Room Transmitter Connects directly to 240V AC supply for long-term monitoring. Size 30mm x 35mm. £19.45 500m range SCRX Subcarrier Scrambled Room Transmitter

Scrambled output from this transmitter cannot be monitored without the SCDM decoder £22.95 connected to the receiver. Size 20mm x 67mm. 9V operation. 1000m range SCLX Subcarrier Telephone Transmitter

Connects to telephone line anywhere, requires no batteries. Output scrambled so requires SCDM connected to receiver. Size 32mm x 37mm. 1000m range

£23.95

SCUM Subcarrier Decoder Unit for SCRX

Connects to receiver earphone socket and provides decoded audio output to £22.95

headphones. Size 32mm x 70mm. 9-12V operation

ATR2 Micro Size Telephone Recording Interface Connects between telephone line (anywhere) and cassette recorder. Switches tape

automatically as phone is used. All conversations recorded. Size 16mm x 32mm. £13.45

Powered from line

*** Specials *** OLTX/DLRX Radio Control Switch Remote control anything around your home or garden, outside lights, alarms, paging system etc. System consists of a small VHF transmitter with digital encoder and receiver unit with decoder and relay output, momentary or alternate, 8 -way dii switches on both

boards set your own unique security code. TX size 45mm x 45mm. RX size 35mm x 90mm. Both 9V operation. Range up to 200m. Complete System (2 kits) Individual Transmitter DLTX Individual Receiver DLRX

£50.95 £19.95 £37.95

MSX-1 HI-FI Micro Broadcaster Not technically a surveillance device but a great idea! Connects to the headphone output of your Hi-Fi, tape or CD and transmits Hi-Fi quality to a nearby radio. Listen to your favourite music anywhere around the house, garden, in the bath or in the garage and you don't have to put up with the DJ's choice and boring waffle. Size 27mm x 60mm. £20.95 9V operation. 250m range

0

ELEKTOR ELECTRONICS APRIL 1995

UTLX Ultra -miniature Telephone Transmitter Smallest telephone transmitter kit available. Incredible size of 10mm x 20mm! Connects to line (anywhere) and switches on and off with phone use. £15.95 All conversation transmitted. Powered from line. 500m range TLX700 Micro -miniature Telephone Transmitter Best-selling telephone transmitter. Being 20mm x 20mm it is easier to assemble than

UTLX. Connects to line (anywhere) and switches on and off with phone use. All conversations transmitted. Powered from line. 1000m range

£13.45

STLX Nigh -performance Telephone Transmitter High performance transmitter with buffered output stage providing excellent stability and performance. Connects to line (anywhere) and switches on and off with phone use. All conversations transmitted. Powered from line. Size 22mm x 22mm. £16.45 1500m range

TID(000 Signalling/Tracking Transmitter Transmits a continous stream of audio pulses with variable tone and rate. Ideal for signalling or tracking purposes. High power output giving range up to 3000m. Size £22.95 25mm x 63mm. 9V operation CD400 Pocket Bug Detector/Locator LED and piezo bleeper pulse slowly, rate of pulse and pitch of tome increase as you approach signal. Gain control allows pinpointing of source. Size 45mm x 54mm. 9V £30.95 operation CD600 Professional Bug Detector/Locator Multicolour readout of signal strength with variable rate bleeper and variable sensitivity used to detect and locate hidden transmitters. Switch to AUDIO CONFORM mode to distinguish between localised bug transmission and normal legitimate signals such as £50.95 pagers, cellular, taxis etc. Size 70mm x 100mm. 9V operation QTX180 Crystal Controlled Room Transmitter

Narrow band FM transmitter for the ultimate in privacy. Operates on 180 MHz and requires the use of a scanner receiver or our QRX180 kit (see catlogue). Size 20mm x 67mm. 9V operation. 1000m range

£40.95

111.X180 Crystal Colotrolled Telephone Transmitter As per QTX180 but connects to telephone line to monitor both sides of conversations. £40.95 20mm x 67mm. 9V operation. 1000m range

QUM Line Powered Crystal Controlled Phone Transmitter As per QLX180 but draws power requirements from line. No batteries required. Size 32mm x 37mm. Range 500m

£35.95

QRX1110 Crystal Controlled FM Receiver

For monitoring any of the `Q' range transmitters. High sensitivity unit. All RF section supplied as a pre -built and aligned module ready to connect on board so no difficulty setting up. Outpt to headphones. 60mm x 75mm. 9V operation

£60.95

A build-up service is available on all our kits if required. UK customers please send cheques, POs or registered cash. Please add £1.50 per order for P&P. Goods despatched ASAP allowing for cheque clearance. Overseas customers send sterling bank draft and add £5.00 per order for shipment. Credit card orders welcomed on 0827 714476.

OUR LATEST CATALOGUE CONTAINING MANY MORE NEW SURVEILLANCE KITS NOW AVAILABLE. SEND TWO FIRST CLASS STAMPS OR OVERSEAS SEND TWO IRCS.

68

Please mention ELEKTOR ELECTRONICS when contacting advertisers

=

-,--

=

=

5

==

=

E

-

==.

_

==

- - .-

- -

ELECTRONIC COMPONENTS AXIAL FLOW FANS

A range of high quality boxes moulded in black high impact ABS, easily drilled or punched to produce a professional looking end product. H PRICE TYPE W L 75 56 25 E0.77 T2 57 22 T4 £0.92 MBi 79 61 40 £1.35 41 £1.47 MB2 100 76 MB3 118 98 45 £1.71 MB4 216 130 85 E5.19 150 100 60 MB5 £2.35 150 64 MB6 220 C3.95 L3.42 MB7 177 120 83 150 80 50 £2.22 MB8

A range of axial fans at low prices. M. indicates aluminium alloy frame and P. a plastic frame.

VOLTAGE W D 12V D.C.

P

24V D.0

M P

P

M P P

115V A.0

M M M

ALL SIZES ARE IN MILLIMETRES

M

'D' COBNECTORS plug 30p

9pin

40p 50p

15pin

25pin

socket 30p 40p 50p

± 12V 0.5A. £17.80 Each SOLAR CELL 2 volt 150mA max, size 60 x 100mm E1.35 each 5 for E6.00 BNC SOCKETS 50 ohm single hole fixing 50p each 10 for £4.00 MULTITURN PRESETS 20mm RECT, 1K, 5K, 10K, 20K, 50K, 100K, IMO 40p each, 3 for £1.00

MINIATURETOGGLE SWITCHES

BREADBOARDS 70p each spdt 3 position c/off 173 X 65mm 840TP 80p each dpdc 3 position c/off £5.25 each 9V D.C. CASSETTE spdt 3 position c/off biased both ways 70p each spdt biased MOTOR 80p each dpdt 3 position c/off biased one way 40mm Dia 30 H MIN PUSH TO MAKE SWITCH 50p. MICRO SWITCH roller arm spdt 40p C1.00 each 60p each 10 for C5.00 5 volt dp/changeover DIL RELAYS 6 FOR £5.00 80p each 10 for £6.00 12 volt dp/changeover CAR HORN RELAY in metal can with fixing lug s/pole on 10 amp contacts C1.00 each 6 for L5.00 £1.50 each 4 for L5.00 20 AMP RELAY dp on 12 volt 60p each 70p each 60p each

dpdc

PRICE C6.96 C4.96

£5.25 £5.25 £4.96 £5.25 E4.96 £4.23 £6.96 E5.25 £5.25 £4.96

.

BULK LEDS OFFER SOO 5mm round RED LEDS L25.85

I

ALARM CONTROL PANEL ST3000

4477 each

E4.50 each

S x INSTRUMENT KNOBS (0.25" SHAFT) High quality grey plastic knob, collet fixing 15ram dia. 3 x INSTRUMENT KNOBS (0.25" SHAFT) High quality grey plastic knob collet fixing 29mm dia.

B011

4 x MAGNETIC EAR -PIECE 8 ohm with 3.5mm plug

B012

4 x 28 -WAY TURNED PIN DIL SOCKET IS x 12 VOLT WIRE -ENDED LAMPS

8005 8006 B007

8013 8015

2 x LIGHT DEPENDENT RESISTOR less than 200 ohms in day light, greater than 100 megohms in darkness

x KEYPAD 20 -key in 5 x 4 matrix bubble type switch contacts

B016

I

8017 B018 8019

2 x PIEZO BUZZERS approx 3 to 20 volt d.c. 5 x 78Ml2 VOLTAGE REGULATORS positive 12V 500mA 4 x TL082CP bi-fet op -amps

B020 B021

20 x ASSORTED LEDS full spec. various shapes and sizes 3 x INFRA -RED DIODE TX/RX PAIRS made by Honeywell (no info)

8022

3 x CONSTANT CURRENT LED 5mm round, red 2-18V d.c.or ac. nominal 14mA

B023

50 x IN4148 DIODE 2 x INFRA -RED TRANSISTORS FPT5I 33 5 x DIACS

8024 8025 8026

B031

3 x BDX33C 10amp 100V npn transistor 12 x 2N3702 Transistor 12 x 2N3904 Transistor 12 x BC337 Transistor 4 x LM3I7T Variable regulator mounted on a small heatsink 2 x MAN6610 2 digit 0.6" 7 segment display Com anode, amber

13032

3 x PHONO TO PHONO LEADS 63cm long

B033

15 x RECTANGULAR RED LEDS 6 x 6 x tram stackable

B027

8028 B029

8030

mega byte. Up to 2 kbyte eprom space, 8 bit 68000 CPU (8MHz), 256K Dual ported RAM expandable to status register, Fast multiprotocol comms interface link, (RS232 compatible),VEMBUS INTERFACE, on -board single chip floppy disk controller. On -board monitor ROM. Real time clock, 24 -bit parallel I/O. Can be used as a stand-alone microcomputer. Over 350 pages of data supplied. L88 50 each

£2.99 each

8009 8010

B004

68000 HIGH PERFORMANCE VMEBUS BASED MICROCOMPUTER BOARD

1200mAH C(HPII) PP3 8.4V 1001nAH

B008

in white high impact ABS 50x70x25mm

OPTODEVICES -LEDS -ETC

E1.02 each £2.40 each

FLUORESCENT LIGHT INVERTOR Drives an 8 watt tube directly

4 x SUB -MINIATURE TOGGLE SWITCHES S.Pole P.C.B. Mounting 3 x SUB -MINIATURE TOGGLE SWITCHES D.Pole P.C.B. Mounting 3 x SUB -MINIATURE TOGGLE SWITCHES D.Pole 3 pos, centre off 3 x DILL SWITCHES 4 -way s.p. on 2 x DILL SWITCHES 8 -way s.p. on 2 x DILL SWITCHES 12 way 90° s.p. on 12 x PP3 BATTERY SNAPS I x CAPACITOR I FARAD 5.5 VOLT 20mm dia. x 7mm high

B03

10p each 12 for £1.00 any mix 5ram rnd red/yellow/green/amber 20p each 6 for C 1.00 any mix 5mm rnd high brightness red/green red 60p each, yellow/green 70p each 5ram rnd flashing 35p each, tri-colour 45p each 5ram rnd bi-colour 30p each 4 for LI.00 LED mounted in chrome bezel red/yellow/green 25p each 5 for £1.00 LED mounted in black bezel red only 40p ea. High brightness bi-colour rectangular LED red/green PLASTIC BEZEL for 5mm rnd leds 10 for 40p EPROMS 27C256-30 27C5I2-25. Once programmed but never used. Mounted on a plastic carrier, can easily be removed from the carrier or used with a low insertion force socket. 27C256 C1.00 each 6 for 05.00 27C5I2 £1.20 each 5 for £5.00 TEXTOOL ZIF SOCKET Suitable low insertion force socket 28 pin. 40p each 3 for E1.00 28 pin zero insertion socket EPROM 27C010-120 (EX NEW CIRCUIT BOARDS) L4.96 EACH L5.95 each SAB 800535 MOSFET MICRO CONTROLLER El 1.75 EACH (EX -STOCK) RFM7ON60 70A 50V 250W SUITABLE P.C.B. MTG SOCKET L2.35 L4.11 each

D(HP2)

600mAH 1200MAH

1.00 BARGAIN PACKS B02

amp 7805/7812/7815 33p each

RECHARGEABLE BATTERIES AA (HPT)

from 6v d.c. Data supplied.

B01

7905/7912/7915 39p each 60p each. 10 for £5.00. 2 amp 78S05/78S I 2 54p each MICRO IC'S 100mA 78L0S/784 I 2/78LI5 all 26p each. 79L05/79LI2 79L 15 29p each Z80A CPU E1.20; Adjustable LM3177 70p each LM723 29p each L200 £1.28 each Z80A PIO £1.50; Transistors TIP2955 70p each TIP3055 70p each Z8OB S I 0 C4.00 2N3053 29p each, 2N3055 70p each 2N4403 28p each, 2N38I 9 40p each

SOp each 10 for C4.00 £1.50 each 4 for L5.00

REED RELAY 12 vol 240 VOLT AC RELAY 3 -pole c/o 10amp contacts

SPECIAL OFFER PROJECT BOX

VOLTAGE REGULATORS 1

ASTEC AC9232-0I Switch mode P5U 50 watts input 230V 0.6A 50-60hz outputs +12V 2.5A, +5V

4.0mhz, 7.5mhz, 10mhz 12mhz, I 8.432mhz, or 33.33 mhz all E150 each or any 4 for C5.00

35p 35p

OUR PRICE L3.76

Full data supplied.

POWER SUPPLIES

CRYSTAL OSCILATORS

cover

40p

The original price of these probes was over C24.00.

spdt

120mm x 38mm 60mm x 25mm 120mn x 25mm 92mm x 25mm 80mm x 25mm 80mm x 38mm 60mm x 25mm 40mm x 20ram 120ram x 38ram 120mm x 25mm 92mm x 25mm 80mm x 38mm

M

1

6.0A, ± 5V 0.5A,

'PROJECT BOXS.

III

TEMPERATURE PROBE High quality probe consists of a resistire sensor mounted in a plastic covered probe with a meter curled lead. Temp. range -40 to I50°C. Resistance at: 150°C 188.3 ohms; - 40°C 336.5 kohm; 25°C 10.0 kohm 70 ohms.

B034 B035

I

x PHOTO SENSITIVE SCR mounted on a PCB, data sheet supplied

4 x IECPANEL MOUNTING MAINS PLUG Snap fix 5 x ASSORTED PIEZO TRANSDUCERS 5 LENGTHS OF HEATSHRINK SLEEVING 8mm dia. 400mm long 25 x CERAMIC DISC CAPACITORS 0.1 mfd 63V

Wire free alarm control panel, detectors communicate with the panel by means of radio transmitters" Speech synthesis for programming and general operating guidance* Built in user programmable telephone dialler* Up to 32 transmitters can be used* Programmable exit/entry and bell timers* Programmable user codes* Many other features* Full installation data supplied.The only thing that has to be handwired is the output to the siren/bell unit (not supplied)* These control panels cost over £300.00. Yours for only L59.95. PASSIVE INFRA RED SENSOR/TRANSMITTER UNIVERSAL TRANSMITTER For connection L25.85 each. Battery operated, available in 8mm of normally open or closed contacts for door/ range, 10m range or 25m range. window switches, pressure mats etc. C17.63 each

8036 8037 8038 8039 8040 8042 8043 5044 8045 8046

1 S x MONOLITHIC CERAMIC CAPACITORS 0.1 mfd 63V, in a dill package 25 x ASSORTED ELECTROLYTIC CAPACITORS PCB mounting useful values 25 ASSORTED PRE-SET RESISTORS 6 x 3.5MM LINE JACK SOCKETS (mono) 6 x 3.5mm JACK PLUGS (mono) 8 x 3.5mm CHASSIS SOCKET (mono) 2 x TRIACS 800V 8 amp 12 x BC2I3L Transistor

ALARM CONTROL UNIT

13047

12 x MIN SLIDE SWITCH dpdt

13048

15 x MIN CERMET TRIMMER POTS (good range of values) I x PCB WITH TWO LARGE LEDS 15mm square, one red one green x I2VDC RELAY 4 pole c/o with plug in base

Single zone alarm control unit built into a domestic light switch box. Ideal for home, caravan, boat, garage, shed e.t.c. Facilities - Normally closed and Normally open loops. 24 -hour personal attack loop. Visual indication that the system is operational. Automatic entry/exit delay. Automatic system reset Alarm output cmos logic level.

PRICE COMPLETE WITH FULL INSTRUCTIONS

L8.95 each

EX INSTALLATION SENSORS tested working TYPE I. Measure 130ram x 70mm x 50mm with walk test led, relay output and tamper protection. 12 volt dc supply required C6.50 each TYPE 2.As above but a smaller unit 85ram x 75ram x 50 £8.50 each TYPE 3. Ceiling mounting passive, infra red sensor 360° detection I2v d.C. supply relay output, tamper circuit and pulse count option. Data supplied. £12.00 each Please note:

There may be variations in the size of the above PIE'S depending on stack at the rime of ordering.

But the unit will

certainly be within the stated sizes.

DUAL TECH SENSOR Microwave and passive infra -red combined. led indication for each function. Measure 120 x 75 x 50ram 12 volt d.c. supply. Relay output. Tamper protection. £21.15 each

SUB -MINIATURE PASSIVE INFRA -RED SENSOR Brand new passive infra -red sensor, measures only 33mmW x 24mmH x 29minD. Logic level output. Full data and application notes supplied. £7.95 each SOUND BOMB Two tone alarm sounder incorporating four piezo elements in white plastic box.

100db I2v d.c.

C5.99 each

8041

8049 B050 B051

B052 B053 13054

B055 B056

8057

1

4 x LM324 quad op -amps 4 x 555 Timer 5 x 741 op -amp

25 x IN4001 diode 20 x IN4007 diode I

I

x SLOTTED OPTO x DAC08 digital to analogue convertor with data

8060

4 x OPTO ISOLATOR 3 x C106D THYRISTOR

B061

5 x 78M05 VOLTAGE REGULATORS positive 5 volt 500mA

13062

10 x TACTILE SWITCHES 25 x 0.0IMFD 50V CERAMIC DISK CAPACITORS

B058

B063

PLEASE USE ORDER CODE WHEN ORDERING THE BARGAIN PACKS. SIREN 12 volt dc for external use I I6db

£8.95

PIEZO SOUNDER 100db 3-12v d.c. 40Ma, 45ram dia. x 26mm (1.76

MINIATURE HORN SIREN 100db two-tone piezo siren I2v d.c. L5.17 each VIBRATION SENSITIVE ALARMBOARD WITH PIEZO SOUNDER

Please make cheques and postal orders payable to MAILTECH All prices includeVAT. Please add C1.00 postage and packing to all orders. Telephone enquiries between 10.00am and 3pm Tuesday to Thursday. Fax and answerphone at other times on 058 474475.

Originally a bike alarm. There is a short delay after activation then the piezo sounder operates for a preset period. £3.76 each or the above alarm board with a custom designed case fixing hp and keyswitch E995 UNIVERSAL BELL TIMER 10 or 20 minute bell cut off +ve or ve trigger timed relay contacts C496 each

MERCURY TILT SWITCH Standard on/off 2 CONTACT CI 00 each

4 contact (directional) El 50 each

DOOR/WINDOW CONTACTS Surface or flush mounting, white LI 10 each JUNCTION BOX White 6 way 60p each PERSONAL ATTACK BUTTON E320

PIEZO VIBRATION

:

£

9

SENSOR with data sheet LI 00 each

1

:

ELEKTOR ELECTRONICS APRIL 1995

69

Please mention ELEKTOR ELECTRONICS when contacting advertisers WE HAVE THE WIDEST CHOICE OF USED OSCILLOSCOPES IN THE COUNTRY TEKTRONIX 7000 SERIES OSCILLOSCOPES

H.P.3456A DVM 6z/,digit DC/True RMSAC/Res. HPIE EIP/DANA3410.0crowaeFreouencyGouoter201-6.188HL

1600

H.P.5341A FreouencyCounter 50MHz .1.50110 LED PAARCON13435Digital Freo.Meter2GH2

L300

LEGO

AVAILABLE FROM L200- PLUG -INS SOLD SEPERATELY

RACAL1901UnNersalCounter/Dmer180MHz9digit MARCON12437 Universal CounterDmer DC.100N16z8dielt ....................11]5 .. 11.50 MARCONI2431A FrequencyCounter 10H,200MHz 8 digit .............. .. L200

RACAL9918FreouencyCoonter 10H,520MHz 9 digit ....................... TEKTRONITFUTRONIXSC501 Dual Trace SOMHz In Th1503B as new .......................... f...

IWATSUSS5711C 4Ch.100MHz Delay sweep8ilh DMM . TRIOCS20704Ch,70MH, Delay Sweep . TEKT505IX2213 Dual Trace60MHz .... HITACHI V650FDual Trace60MHz PHILIJPSPNI3217DualTrace50MHZ Delay...MR TELEOUIPMENTD83DualTrace 50MHz DelaySweeP ..

. L500 £650 0350 0350 £400 . L200

SOUL1,051100S1DualTrace30MHZ HITACHI412Dual Trace 2016Hatrigto 40161Ht.Deley 00ULDOS300Dual Trace 20MHt TEXTRONIX 922 Dual Trace 15MHz .

. L200

..00 .00

TRIO CS1566A Dual Trace 20MHz LE CROY 9400 Dual Trace 125MHz Digital Storage

LL000 ....... HITACHI VC6045 Dual Trace 100MHz 4000/S. Cursors DOM StOrageL1100

PHILUPS PM3305 4Trace 35N1Hz Digital Storage ..0

RIGEL Corporation builds and supports professional development tools for embedded controller systems, with hardware and software for industrial applications, and boards, books, and kits for educational and training purposes.

OATRON1061A -6.5 digrtA.ocal Multimetertme RMS AC/CUITent ........

H.P.3490A 5 DigrtMultimeter ACOhms 7........................................ 1200 H.P.3435A3V,DigrtMultimeterAC/DC/011ms/Current LED ..................._... MAO PHILLIPSPM2534Mult Function DMM3z/,-5Q,diga GPIS/TEEE.................. £450 SOLARTRON71508.5-3.5digitDMM.HEEE SOLARTRON70454.5digitMAMeterVelts/AmOS/Ohas . 1900 WAYNEKERR13005AvtomaticPrecson8ridge0.05K . OO

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L225 . 1200 . 0200

MATSU S55702 Dual Trace 20MHz

8051 / 80C16x EMBEDDED CONTROLLERS

fAGO

RACAL1998FrequensyCounter 1.3GHQOptionsGPIB&HighSte18....... ..0

MANCONITF1313AUn,erselLCR Bridge 0.1% WAYNEKERR 8424Digital LCR Meter HEATIO(MBRLC Bodge

£50

THE RIGEL DIFFERENCE All of our boards come standard with:

BRABLY1920sciloscopeCalibrator WILTRON500Scaler NehvorkAnalyser

L/000

..

L800 L200

FARREL H30/100030V, 0-100Amps Metered ............. FARNELLIVS70M1070volts5Amps/35vottslOSTOSPAMIled FARNELL330/10 30Volts10Ainpsvanable .

.00

TB(TRONIX 466 Dual Trace 100067 Analogue Storage ....................... L400

f'°°

THIS MAST A SAMPLE MANY OTHERS AVAILABLE

H.P.66408SighalGenerator2OH61024MHz .

H.P.8620C SweepOollator with 8824505.9-1206Ni. .....

SYSTRON DONNER1702 Synth. AM/FM SigGen 100Hz-1GHt .. RACAL9081 Synthesded AM /FM SigGen 5.520MHz EARNER SS0520 Synthesized AM /BA 510 Gen 10 - 52011110..

BRANDENBURGMode1472RPSU-Q 1, BLAMLSTARMeteor100101MHz Freq. Counter -.

.... £100

- - .00

L.0

H.R. SMI. ANTENNA type 126024

0_,00

RACAL MSTRUMElfr RECORDER type Store 40N ..

go, H.P. 35750 Gain Phase Meter 100. 136110 M.P. 3312A Feln. Gen. 0.1Hz.1310Hz AM/FM Sweep:Sine/SCUM etc... 1400 MARCONI TF2337 Automatic DistorOon Meter ................................. UPP L125 SAYROSA Automate Modulation Meter type 2528 TEKTRONIX CP5250 Triple Output ISO 202000.5A Y06 5V2A............. 0225 £225 TEKTRONIX CFG250 Fetn. Gen 0.200 2MHzSne/55/T5 Ito TEKTRONIX CDM250 Digital Mulktirneter 3' /,digit LED. 1180 H.P. 4275A Multi Fog LCR Component Meter . L3E00 THANDAR TG501 Fun Gen. 0.0005MHz Sale/ Sq/To/HOmP/Polse etc £200 meter 20Hz 20101z 0.05% ......... £150 MARCONI 712331

H.P. 35800 LEDO Ikelliz 50101z 7_ ANMISU M562E1 VOth Tracking Generator 101/H61700SH0 POLARAO 641-1 10MHz - 182H/ ............. ANOOAC8281 with AC8211 1700000 H.P. 182 wan 8558 1006Hz -150001-10..

H.P.1410 with 85548 8.85528 500HW-1250MHz H.P. 141T with 8s138085520 16Hz .110MHz .. MARCONI TF2370. 30110- 110MHz .

.

. 15000 £4000 11000 . L1500 . L1500 L1500

gym

. L1200 L800 L1000

H.P. 84140 M. Tim.2.0 0.0.62.....02. fin. ........----- 2-2. H.P. 141T Main Frames may. Good Tribes .

CMOS technology 64K Memory Machine screw sockets Multi -layer boards System signals on headers 110 on terminal blocks Integrated Development

£120 ............ LEO L150 L200 170 £60 L125 L500 1350 L1000 £300

FARNELLPG101Pulse Gen. 100nSeos 10MHx(Isec1HO UNDON LA1 MOB AudioAnalYser .

UNAOHMEP501AudioAnalyser PHILUPS PM5518 Colour TVPattern Generator RADFORD LD04 Low DISTORTION Ocill.or .. RADFOROLDMS2 Low DISIORHONMeasunrgSet

£100

MARCONITF230013Modul.ionMeterAM/FMAAML-1.2G1tr MARCONI TF3938 Audio Power Meter . H.P. 16300 Logo Analyser 4300 H.R. 84050, Voltmeter 1 1000MHz from

Software, READS

L7E0

Sample programs Circuit diagrams BBS Tech support International Sales Offices

NEW EQUIPMENT NAMES OSCILLOSCOPE HO 1005 Triple Trace 100MHZ. Delay Tlrnehase NAMES OSCILLOSCOPE HM 604 Dual Trace 60MHZ. Delay Sweep HAMEG OSCILLOSCOPE HM203.7 Owl HMS 20MHZ. Component Tester NAMES OSCILLOSCOPE HM2053 Mal 096e 21.1MHZ. Digital Storage

1.847

Our entire line of boards are programmable in Assembly, BASIC, CO"" and Forth. We also offer low cost Fuzzy Logic Software for the 8051.

£653 All other models available -all oscilloscopes supplied Mm 2 probes

BLACK STAR EQUIPFAENT (113iP en Una. 1.-5) APOLLO 10 - 100MHZ Counter Timer Ratio/Period/Tirno Nonni! etc

SPECTRUM ANALYSERS .

..

BLACKSTARIuprtor 50050010-6Fun Gen Sine/Sp/WM FEEDOACKFG.00.01Hz-1001(HtSine/Sq/TH .

£200 MARCONI TF2008 AM/FM Sig Gen 106Hz - 5101.61-6 Same Facility ...... £200 E200 MARCONI TF2015 AM/FM Sig Gen 1066z . 510MHz E350 MARCONI TF2015 Nan Synchronizer TF2171 (loch box) MAR/SANDERS 66000 Mw. Sweep Osc wrth 6651 Plagin 26.5101840GH, 1300 8697A Plogin 213.511H, 406Hz L300 GP. 86908 Microwave Sweep

H.P. 8565A odi - 22611z H.P. 853 with 8559A 0.01 .21660 .....

.............

H.P.6516A0-36V: 0-6MA Metered

......- ......1300 ....

MARCON12018SyntnesimaAM/FM SgGen8041,52051..........

THORLIETP1320 30V2A Digital ........... MARCONXWEIRITF21540.30,A;0-36V:

HEWLETT PACKARD 1740A OSCILLOSCOPES 100MHz Dual Trace, Delay Sweep. £350 For Only

1225

APOLLO 100 . 100MHZ (As above with more NdellOnG) . METEOR 100 FREQUENCY COUNTER 100MHZ ............. METEOR 600 FREQUENCY COUNTER 600MHZ METmR 1000 FREQUENCY COUNTER JUPITOR 500 FUNCTION GENERATOR di H,5001(HZ. Sine/SG/DI

.

Complete 8051 systems start at $85, SAB80C16x systems start at $166

f.115

ORION COLOUR BAR GENERATOR

Al other Black Star Equipment avaiMble. OSCILLOSCOPE PROBES Switch.° Cl. x1.0 (P&P L3) .

WRITE OR CALL FOR MORE INFORMATION

£12

Used Equipment Guarantee - Manuals supplied If possible

RIGEL Corporation,

This is a VERY SMALL SAMPLE OF STOCK. SAE or Telephone for li ts. Please check availabillty before ordering CARRIAGE all units £16 VAT to be added to Total of Goods and Carriage

®STEWART

OF READING

11.0 WYKEHAM ROAD, READING, BERKS RG6 IPL

PO BOX 90040, GAINESVILLE, FL 32607

Ell

Telephone (904) 373-4629 BBS (904) 377-4435

Telephone: (01734) 268041 Fax (01734) 351696 Callers Welcome 9am-5.30pm Mon -Fri (until 8pm Thurs)

LOW COST DEVELOPMENT SYSTEM ECAL comprises a versatile relocatable assembler with

The PC based ECAL hardware emulator

integral editor which runs about ten times faster than typical assemblers. Support includes 4, 8, 16 & 32 bit processor families including

integrated with the assembler. Connection is made to the target through the eprom socket so a single pod

is fully

can support all processors.

6502, 6809, 68HC05/11, 8031/51, H8-300, 78K, PICs, ST6

Facilities include windows for

& Z80/180, 68000, 80C196, H8500 & Z280.

registers or memory. You can

75X,

the inspection or change of

even watch your program executing at source level!

ECAL is either available for a single processor family or all

!

Download time is about two seconds!

families.

Pods can be daisy -chained for 16/32 bit systems.

Single processor version £295 Multiprocessor version.... £395

Applications include software

development, hardware debug, test and, finally, teaching about micro -

Overseas distributors required

controllers in education.

OEMA Ltd

ECAL emulator

7 & 711Brook Lane,

Quantity discounts of

Warsash, Southampton 5031 9171 Tel: 01489 571300 ELEKTOR ELECTRONICS APRIL 1995

£475

up to 50% make ECAL

II

software ideal for education.

70

The publishers reserve the right to change prices without prior notification. Prices shown in this issue supersede those in previous issues. E. & O.E.

PRINTED CIRCUIT BOARDS / SOFTWARE / FRONT PANEL FOILS / COMBINATIONS

READERS SERVICES

Article title Except in the USA and Canada, all orders, except for subscriptions and past issues (for which see below), must be sent BY POST to our Dorchester office using the appropriate form opposite. Please note that we can not deal with PERSONAL CALLERS, as no stock is carried at the editorial and administrative office. Readers in the USA and Canada should send orders, except for subscriptions (for which see below), to Old Colony

APRIL 1995 Electronic barometer Bat detector Sun blind control Function generator - PCB + front panel foil

Sound Lab, Peterborough NH, whose full address is given on

- PCB

the order form opposite. Please include shipping cost according to total order value. For surface delivery in the USA, if order is less than $50, include $3; $50+, $4. For Canada

- Front panel foil Stepper motor control - PCB + 8751 + disk

surface,

if

less

than

US$50,

include

US$5;

- 8751

US$50+,

- test program on PC disk

US$7.50. For air or other deliveries, please inquire. Please allow 4-6 weeks for delivery. All other customers must add postage and packing charges for orders up to £25.00 as follows: UK and Eire £1.95; surface mail outside UK £2.45; Europe (airmail) £2.95; outside Europe (airmail) £3.70. For orders over £25.00, but not exceeding £100.00, these p&p charges should be doubled. For orders over £100.00 in value, p&p charges will be advised.

Price (US$)

936033 936046 950035-1

8 50 10 25 9 25

17.00 20.50 18.50

950044-C 950044-1 950044-F

21 75 11 00 12 50

43.50 22.00 25.00

950038-C 956503-1 956004-2

50 75 101.50 35 25 70.50 7.50 3.75

Price

MARCH 1995

Telephone -controlled mains switch: 950010-C - PCB + PIC (946642-1) 946642-1 - PIC 16C54 DSP function generator: - PCB + disk (956001-1) + 950014-C EPROM (956501-1) 956501-1 - EPROM 27C512 956001-1 - software on IBM PC disk 950014-P - Windows program manual 950024-1 TOM 5600 car audio amplifier

SUBSCRIPTIONS & PAST ISSUES Subscriptions and past issues, if available, should be ordered from Worldwide Subscription Service Ltd, Unit 4, Gibbs Reed Farm, Pashley Road, TICEHURST TN5 7HE, England. For subscriptions, use the order form on the oppo-

22.00 17.50

44.00 35.00

49.00 13.25 18.50 7.50 9.50

98.00 26.50 37.00 15.00 19.00

930101 940098-1 940109-1

15.00 10.75 9.75

30.00 21.50 19.50

940100-1

6.50

13.00

940111-1 950012-1 940095-1

7.00 18.75 7.50

14.00 37.50 15.00

940099-1

14.75

29.50

940077-C 946640-1 946640-2

52.75 105.50 12.25 24.40 15.75 31.50

950008-C 946639-1 946639-2

29.25 11.00 13.00

58.50 22.00 26.00

940116-1

8.25

16.50

940117-C 946203-1 930024

15.00 11.50 37.25

30.00 23.00 74.50

940078-2 940054-1

30.25 9.00

60.50 18.00

FEBRUARY 1995

MIDI multiplexor Automatic lighting timer Infrared dimmer Light -effects generator Upgrade your car battery charger Surround sound processor Induction motor governor

site page.

Prices of past issues (except July/August and December), including postage for single copies, are £2.70 (UK and Eire);

£3.00 (surface mail outside UK); £3.20 (air mail Europe); £3.95 (airmail outside Europe). Prices of past July/August and December issues, including postage for single copies, are £3.75 (UK); £4.00 (surface mail outside UK); £4.25 (airmail Europe); and £5.00 (airmail outside Europe).

JANUARY 1995 Mini Audio DAC 1 -to -3 -phase converter: - PCB + GAL + EPROM - GAL - EPROM P.O.S.T. diagnostic card: - PCB + GALs (946639-1/2)

PAST ARTICLES For information on past articles, please contact our Editorial and Administrative Office at Dorchester (telephone 01305 250995: fax 01305 250996).

COMPONENTS Components for projects appearing in Elektor Electronics are usually available from appropriate advertisers in this maga-

- GAL -1

- GAL -2 Self -loading EEPROM type X88C64 SLIC

zine. If difficulties in the supply of components are envis-

aged, a source will normally be advised in the article.

(E)

Order no

It

should be noted that the source(s) given is (are) not exclusive - other suppliers may also be able to help.

Debugging 8031/8051 micro controller systems: - PCB + disk (946203-1) - software on IBM PC disk Quasi -analogue clockwork

BOOKS For book availability, see advertisement on page 81.

DECEMBER 1994

In -car audio amplifier (3) RF immune power supply ispStarter kit from Lattice:

SLIPCASE Elektor Electronics slipcase

£2.95

In resistor and capacitor values, decimal points and large numbers of zeros are avoided wherever possible. Small and large values are usually abbreviated as follows: P (Pico-) n (nano-)

4

z z

2

O

p (micro-) m (milli-) k (kilo-) M (mega-) G (giga-)

$6.00

tolerance types have values selected from the E96 range (IEC publication 63). Resistor colour codes

= 10-12 = 10-9 = 10-6 = 10-3 = 103 = 106 = 109

Examples:

2k5221 = 2.21 k4 = 2,210 Q 2pF2 = 2.2 pF 6V3 = 6.3 V Note that nano -farad (nF) is the international way of writing 1000 pF or 0.001 pF. The international letter symbol 'U' is used for voltage instead of the ambiguous 'V'. The letter V is reserved for 'volts'. Resistors are 0.5 watt, 5% metal film types unless otherwise specified. 1% and 0.1%

silver

black

rid yellow

blue

grey

0

0.01

10%

0.1

5% 200

1

1

10

1%

100

2

100

2%

50

3

1k

4

10k

5

100k

0.5%

6

1M

0.25%

10

7

10M

0.1%

5

8 9

15 25

Price

Price

(E)

(USS)

940093-C 946204-1

21.50 9.75

43.00 19.50

940055-1 940078-2

4.00 30.25

8.00 60.50

940085-C 946641-1 940091-1

47.50 23.50 10.00

95.00 47.00 20.00

940083-1

7.25

14.50

936062-1 936062-2 940084-1 940078-1

9.50 28.25 6.50 14.00

19.00 56.50 13.00 28.00

940065-C 946643-1

26.25 20.25

52.50 40.50

934004 940017 940051-1

6.50 6.25 9.00

13.00 12.50 18.00

940045-1 940068-1

6.00

12.00

5.50

11.00

930099 936066

9.00 9.75

18.00 19.50

- EPROM 27C64 Charge meter Water softener Joystick -to -mouse adaptor Discrete preamplifier Centronics I/O interface 80C451 controller board Robust AF power amp PC over -temperature alarm 1-4 MByte SIMM adaptor Optical doorbell PIC experimenting board

940019-C 946635-1 940033-1 944011-1 944040-1 944063-1 944067-1 944069-1 944075-1 944076-1 944094-1 944080-1 944105-1

26.75 13.75 5.75 6.00 7.00 8.50 8.75 15.00 9.75 4.25 15.50 6.25 17.75

53.50 27.50 11.50 12.00 14.00 17.00 17.50 30.00 19.50 8.50 31.00 12.50 35.50

RC5 transmitter with 800535: - PCB + disk (946199-1) - software on IBM PC disk

944106-C 946199-1

13.00 9.75

26.00 19.50

- PCB + disk (946204-1) - examples on PC disk NOVEMBER 1994

Single -wire communication In -car audio amplifier (2) Solid-state disk: - PCB + EPROM (946641-1) - EPROM 27256 Simple capacitance meter OCTOBER 1994

Motive -battery charger Integrated AF amplifier: - output amplifier PCB - preamplifier PCB Tester for IR remote control In -car audio amplifier (1) TV line monitor: - PCB + PIC (946643-1) - PIC 16C54 SEPTEMBER 1994

Switchable a.c. supply Anemometer & flow meter Compact frequency meter Revolution counter: - sensor board (option) - main board JULY/AUGUST 1994 General purpose IR volume control

IR controlled switch MIDI swell pedal: - PCB + EPROM (946635-1)

A list of all PCBs, software products and front panel foils available through the Readers Services is published in the March, June, September and December issues of Elektor Electronics

Capacitors: the direct working voltage of capacitors (other than electrolytic or tantalum types) is assumed to be V. As a rule of thumb, a safe value is about 2x the direct supply voltage. Unless otherwise stated, general-purpose polycarbonate types are used for values .1nF, and ceramic types for values