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AN ARGUS SPECIALIST PUBLICATION INTERNATIONAL AUGUST1983 85p (MATE YOUR LIFE Z80 -based control computer for home, industrial and laboratory ontrol modular construction Oo for maximum flexibility Z-80 _TELETEXT MAIN BOARD N I INTERRUP BOARD .AUDIO....00 PUTING.. AD10....ROBOTICS.. Star sounds BIG NEWS Star quality** ABOUT OUR LATEST Free ADVANCES IN SECURICOR DELIVERY ROBOTICS on all orders over Star features** SEE INSIDE £100 (UK mainland TRANSCENDENT 2000 - Although only BACK COVER only) Add just £2.50 171700 a 3 octave keyboard the '2000' features on lower price the same design ingenuity, careful orders engineeringandquality com- II ponents of its larger brethren. The kitiswell within the scope of the first time DJ90 Stereo Mixer - this is a really builder - buy it,build it versatile new mixer that enables the - playit!You will know constructor DJ to produce a profes- sional performance every time. There you havemade theright are two stereo inputs for magnetic cart- choice. ridges. a stereo auxiliary input and mike input. Other 'plus' features are auto - Complete kit £165.00 + VAT panning for fast or slow slider controls, multi -mixing, ducking, interrupt,input NNW modulation, in short everything . the whole works- AND - under £100 complete! Complete kit £97.50 + VAT SALES Digital Delay Line - With its ability to give COUNTER Collect your order delay times from 1.6 mSecs to up to 1.6 from the factory. secs. Many powerful effects including Open 9-12/1-4.30 phasing, flangine, A.D.T., chorus, echo & Mon-Thurs. Easy parking, no waiting POWIRMAN CMCNTAL DELAY LANE - This versatile modular mixer, featured as a constructional article in Practical Electronics can be built up to a maximum of 24 inputs. 4 outputs and an auxiliary channel. Each input vibrato are obtained. The basic kit is ex- channel has Mic and Line inputs, variable gain. bass and treble controls and a para- metric middle frequency equalizer. There are send and return jacks, auxiliary. pan and tended in 400 mS steps up to 1.6 secs. fader controls and output and group switching. The output channels have PPM displays Simply by adding more parts to the PCB. and record and studio outputs. The auxiliary channel also has a PPM display and there is Compare with units costing over £1,000! a headphone monitor jack and a built-in talk -back microphone. The mixer modules plug into base units each of which takes up to 6 channels. To eliminate hum, the power supply Complete kit (400 mS delay) is in a separate cabinet. £130 + VAT Parts for extra 400 mS delay KIT PRICES Free Soldering £9.50 + VAT £27.50 Input channel £19.90 Base unit and wooden front Practise Kit on Output channel £18.50 Pair of mahogany end cheeks£12.50 £19.50 request with your MPA 200 - is a low price, Auxiliary channel £22.50 Power Supply and cabinet high power 100W amplifier. Blank Panel £3.00 fltst kit - useful itssmartstyling.profes- tips, well sional appearance and per- All prices are VAT exclusive formance. make it one of our illustrated. most popular designs. With adaptable inputs the mine. TRANSCENDENT POLYSYNTH - A four octave poly- accepts a variety of source - phonic synthesiser with outstanding design characteristics yet straightforwardcon- struction makes itideal for and versatility and performance to match. the first time builder. Complete sit £49.90 + VAT Complete kit £275.00 plus VAT (single voice) Chromatheque 5000 - a 5 channel lighting system powerful enough for professional discos Extra voice (up to three more) £42.00 plus VAT yet controllable for home -effects. Sound to light. strobeto music level, random or sequential effects - each channel can handle up to 500W yet minimal wiring is needed with our unique single board design. Complete kit £49.50VAT ETI VOCODER - 14 channels. each with independent level con- trol, for maximum versatility and intelligibility. Two input amplifiers - for speech /excitation - each with level control and tone control. The Vocoder is a powerful yet flegible Component machine thatisinteresting to build and packs for most thanks to our easy to follow construction manual. is within the capability of most enthu- kits are available siasts Complete kit £175.00 VAT See our great free SP2 200 twice the power with two of the reliable, durable and economic amps from the MPA 200: fed by catalogue, full separate power supplies from a common toroidal trans- former. Superb finish and quality components throughout - details of all up to (even over) the standard of high prices factory -built units' our range Complete kit £64.90VAT WORLD LEADERS IN ELECTRONIC KIT DESIGN AND SUPPLY PORTWAY INDUSTRIAL ESTATE ANDOVER, HANTS SA10 3NM. v,sA ORDER BY PHONE (0264) 64455 11 Simply request your chosen kit and quote your Access or Barclaycard Number. cir Riffs INTERNABONAI AUGUST 1983 VOL 12 NO 8 I AN ano,spit,ifal:IFYSLICA today EDITORIAL AND ADVERTISEMENT OFFICE electronics 145 Charing Cross Road, London WC2H OEE. Telephone 01-437 1002131415. YOUR Telex 8811896. ANIMATE owAN LIFE to ..... computerZuf0mtoal4E:44,4.44! for home control FEATURES tr and laborAtury 4. ontrOt Modular OstrUCt.00 DIGEST 11 IC UPDATE 39 for nlixtmum tle xibtilly What can we say? Irreverentir- New ICs for old- at least, one relevancies,stupidstories,potty brand new IC and one replacement press releases, nefarious news... for a hoary old favourite. MOTOCAR 24 When a leading manufacturer takes READ/WRITE 54 a bus to the car, it's time for big We have a controversy over the changes in the auto industry. Hyconomiser and a criticism of our 01 Poor- i -41 audio buying guide. We don't mind ADIO ROBOTICS COMPUTING people being rude to us, honest. AUDIO Dave Bradshaw: Editor Phil Walker: Project Editor Jerry Fowler: Technical Illustrator I TECH TIPS David Kitchener: Advertisement 58 Manager Only room for a couple this month Joanne James: Assistant after last month's beano- these are Advertisement Manager for a traffic lights simulator anda Ron Harris B.Sc: Managing Editor keyboard alphanumeric lock. T.J. Connell: Managing Director 11 PUBLISHED BY: Argus Specialist Publications Ltd., 145 Charing Cross Road, London WC2H OEE. PROJECTS DISTRIBUTED BY: Argus Press Sales & Distribution Ltd., 12-18 Paul Street, London EC2A 415 GRAPHIC EQUALISER 18 UNIVERSAL EPROM PROGRAM- (British Isles) Not being a magazine forhalf MER PRINTED BY: 45 QB Limited, Colchester. measures, this a truly professional Now there's no excuse not to use COVERS PRINTED BY: design with not one but three chan- EPROMs to hold your programs- Alabaster Passmore. nels per octave. this unit will program nearly all the TV STORAGE SCOPE 30 devices that you can currently buy. OVERSEAS AUSTRALIA - Roger Harrison Second and concluding part of our EDITIONS CANADA - Halvor Moorshead state-of-the-artdigitaldesign can and their GERMANY - Udo Wittig EDITORS HOLLAND - Anton Kriegsman convert your TV into a 10 MHz RADIO CONTROL SERVO FAIL- storage scope. SAFE Member of the 61 ABCf Audit Bureau A little gadget that sets servos ina of Circulation 'safe' position if the radio link fails. lectronics Today is normally published on the first Fri- day in the month preceding cover date. E The contents of this publication including all articles, designs, plans, drawings and programs and all copyright and other in- tellectual property rights therein belong to Argus Z80CONTROL COMPUTER 65 Specialist Publications Limited. All rights conferred by the law of Copyright and other intellectual property A simple microcomputer basedon rights and by virtue of international copyright conven- the well-knownZ80 tions are specifically reserved to Argus Specialist processor that Publications Limited and any reproduction requires the has a multitude of uses in controll- prior written consent of the Company. © 1983 Argus Specialist Publications Ltd All reasonable care is ing all sorts of things. taken in the preparation of the magazine contents, but the publishers cannot be held legally responsible for errors. Where mistakes do occur, a correction will nor- mally be published as soon as possible afterwards. All FOIL PATTERNS 72 prices and data contained in advertisements are ac- cepted by us in good faith as correct at time of going to press Neither the advertisers nor the publishers can be held responsible, however, for any variations affecting price or availability which may occur after the publica- INFORMATION tion has closed for press 0 Subscription Rates. UK £13.15 including postage. Airmail and other rates upon ap- THIS YEAR'S BREADBOARD EX- READER SERVICES 70 plication to ETI Subscriptions Department, HIBITION 35 ETI PCB SERVICE 77 513 London Road, Thornton Heath, Surrey ETI BOOKS SERVICE 53 ADVERTISER'S INDEX 82 C134 6AR. ETI AUGUST 1983 3 WATFORD ELECTRONICS TRANSISTORS AC126.'7 35BC212/ 10 912664 36 MP5456 30 00101 10 2543706/9 10 2SC2078 170 AC141/2 30 33 34 CARDIFF ROAD WATFORD BC213 10 102561 41 MPS470 30 V/110KM 263713 2502091 HERTS ENGLAND AC176 140 21) BC213L 10 BF257/8 32MPSUO2 513 V6464F 75 263771 171 2SC2314 AC187 BC.214 10 MAIL ORDER. CALLERS WELCOME V ElF259 SMPSUOS 66 1/14613.4F SO 263772 IN25C21136 las AC188 BC214L 10 17336/7 40MPSUO6 56 V5139144 136 263773 210 2002336225 ACY19/2176 14 Tel. Watford 10923) 40588 Telex8956095 8C237'8 BF594 /5 33MPSU52 85 VNSIAF 2802541 30 ACV?? 4' 75 263819 23' BC2560 30 6F639,40 23MPSU55 50 211107/8 11 25C2612225 AD142 120 BC3078 14 263820 31 81841/79 23MPSU56 90 ZTX109 12 26382213N'250234 74 40149 79 BC308 II IS 8E494/5 30MPSU56 ZTX212 212631168 9225045 90 ALL DEVICES FULLY GUARANTEED. SEND CHEQUE, P.O.s, CASH, BANK DRAFT A0161 42 8C3I8 SO 511141/71 MOa6 170 ZTX300 13 15 2562138 2111 A0162 42 BC127/9 18 2543903/4 WITH ORDERS, ACCESS/MASTER CHARGE ACCEPTED.