Robot Electronics Interface, Timer
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'01111411111 Wireles,. rld FEBRUARY 1986 95p Synchrodyne receiver Forth for control Compact disc mastering Loop aerial Australia A$ 3l5 Denmark DKr 38 00 Robot electronics interface, Germany Dm 7 50 Greece Dra 360 00 Netherlands DR 9 20 Italy L 4 /0 0 land NI$ 4 80 Sparn Pts 421) 00 Switzerland SFr 8 00 Remote-controlled timer Singapore . M$ J 00 USA $ 4 00 www.americanradiohistory.com 4i/ 1Â1401 IL :1G oiriTHE HIGH TECHNOLOGY TEST INSTRUMENTS OF THE FUTURE GRUNDIG OSCILLOSCOPES M020: 20MHz DUAL - CHANNEL M022: 20MHz DUAL- CHANNEL OSCILLOSCOPE OSCILLOSCOPE WITH AUTOMATIC TIME 20MHz Dual channel oscilloscope RANGE 2 mV /cm with full bandwidth 20MHz Dual channel oscilloscope Automatic peak-value trigger Automatic time base selection TV line and field triggering Soft tuning for fast manual adjustment Add and invert (Both channels invertable) Triggerable 2nd time -base, guarantees error Internal graticule and X -Y operation free 'zooming -in' This 20MHz dual -channel oscilloscope has Hold -off control and Z modulation advanced facilities, making it easy -to -use, with Plus all the advanced engineering of the M053: 50MHz DUAL - CHANNEL all the ruggedness and reliability to meet your M020 OSCILLOSCOPE go- anywhere testing needs. Included is a peak -value trigger to ensure stationary displays. 50MHz Dual channel oscilloscope Automatic Triggering facilities allow clear display of even time -base selection complex signal shapes. Alternating 2nd time -base for expanded traces £275 Digital display of time- bases, for unambiguous measurements Suits advanced applications in pulse, data and video technology A 50MHz dual -channel oscilloscope. Time -base range is automatically selected and shown on a digital display. Like the M022, it has a Now, the world's first low cost 'scope with triggerable 2nd time -base, guaranteeing error - automatic time -base selection. Dual -range free 'zoom -in' on a selected area of the trace. 20MHz capabilities also include'soft tuning' in Performance with TV signals is particularly manual mode, so the 'scope leaves you free to impressive. carry out the measurement. £395 £995 GRUNDIG TV/VIDEO TEST EQUIPMENT COLOUR GENERATOR FG 7 VIDEO GENERATOR VG 1000 PAL pattern generator Professional video generator 15 test patterns Comprehensive range test patterns of Multiburst facility to measure frequency Includes VTR head adjustment signal response Excellent signal quality 8 memories for rapid station store /recall External sync. facility Suitable for TV sets, monitors or VTRs RGB output Compact and versatile for field or laboratory Aprofessional broadcast -quality pattern use generator to meet the highest professiónal standards. Its special test card allows full visual assessment of the video system, including a FIELD STRENGTH METER ME90 special output for Fully automated field strength measurement precision testing of VTRs. £1650 LF radio to UHF TV in a single unit vc®oIMwoe v310000 Versatile test result selection Storage of received signal frequencies, for , Mt I- , 41111110pmmir rapid testing '04 D- I -... _ .'."t . - -= Alpha numeric display for station checks ITIi -, .il''1 Versatile enough to check -out TV receivers, Unattended monitoring with built -in results i ;- r- ...°...t-G..i= - 1o22,' monitors and VTRs, this compact generator is at printer home in the field as it is in the lab or workshop. Stereo decoding -- In addition to 15 monochrome and colour image Fully portable: integral battery and charger signals, further picture patterns can be achieved Microprocessor controlled for push- button by superimposition. Eight station frequencies can operation in all transmitter checks. The ME90 be recalled from memory for rapid test capability allows fast and accurate measurements in radio - even for special bands and TV bands, long wave to UHF. Versatile print and the IF output. £545 capabilities provide hard -copy confidence, whether routine or For further information and a colour brochure contact our Sales Office. continuous monitoring. All prices exclusive of carnage and VAT. Prices correct at time of going to press. A copy of our trading conditions is available on request. £2695 r r r- o r- Electronic Brokers Ltd, 140 -146 Camden Street, Q-,1 r== >. o L- r o 0 I d D London NW1 9PB Telephone: 01-267 7070 o o D.I r Electronic Brokers D L D ==D Telex 298694 Fax 01 -267 7363 ' ;;;',z` .' www.americanradiohistory.com Editor ELECTRONICS 8 PHILIP DARRINGTON Deputy Editor GEOFFREY SHORTER, B.Sc. 01 -661 8639 Technical Editor MARTIN ECCLES ire ess wor 01 -661 8638 Projects Editor over 70 years in independent electronics publishing RICHARD LAMBLEY 01 -661 3039 or 8637 (lab.) February 1986 News Editor Volume 93 DAVID SCOBIE 01 -661 8632 Number 1600 Drawing Office Manager ROGER GOODMAN FEATURES 01 -661 8690 BETTY PALMER Advertisement Manager Naiad robot trainer -4 17 BOB NIBBS, A.C.I.I. by K.H. Becker Forth in control 59 01 -661 3130 Interfacing the robot arm with by David N. Sands MICHAEL DOWNING Apple, BBC, Commodore and IBM The computer language Forth is, 01 -661 8640 computers. argues D.N. Sands, particularly ASHLEY WALLIS suited to the control of machinery. 01 -661 8641 He explains how. Northern and Midland Sales BASIL McGOWAN Data conversion 27 021 -356 4838 by M.E. Eccles Classified Executive Listing, by manufacturers, of a -to -d Timing by remote control SUSAN PLATTS and d -to -a converter i.c.s and 63 01 -661 3033 modules. by Peter Ferris Advertising Production This versatile self-contained Z80 BRIAN BANNISTER timer controls eight appliances with (Make -up and copy) 100 on -off settings using coded r.f. 01 -661 8648 Short -wave loop aerial 4 1 bursts injected in the mains supply. by G. Wareham Using Mukherjee's April 1985 design with domestic receivers. 68000 board - 5 72 by K.F. Coates Compact disc mastering 47 Guided tour of the Kaybug monitor by J.K. Watkinson software's 26 system calls. Current issue price 95p, back issues (if The confusion about p.c.m. available) £1.06, at Retail and Trade Counter, Units 1 &2, Bankside Industrial adapters and video recorders is Centre, Hopton Street, London SEI. explained, together with the Tel. 01 -928 3567. formats. Available on microfilm; contact editor. D.b.s. - a plan in search of 75 By post, current issue £1.30, back issues some users (if available) £1.40, order and payments to EEP Sundry Sales Dept, Quadrant Synchrodyne a.m. receiver 53 by Tom Iva11 House, The Quadrant, Sutton, Surrey by J.L. Linsley Hood An element of confusion still SM2 5AS. Tel. 01 -661 3378. attends plans for satellite television, Editorial & Advertising offices: Circuit details and setting up Quadrant House, The Quadrant, Sutton, procedure for the phase -locked in spite of two international Surrey SM2 5AS. oscillator. conferences. Tom Ivall explains. Telephones: Editorial 01 -661 3614. Advertising 01- 661 3130. Telex: 892084 BISPRS G (EEP) Facsimile: 01 -661 2071 (Groups Ii & Ill) REGULARS Beeline (300 baud): 01 -661 8978, type EWW to start, NNNN to end. Subscription rates: 1 year £18 UK News commentary 6 Circuit ideas and £23 outside UK. 33 Wireless world Student rates: 1 year £11.40 UK and Alvey's flagship. Power watchdog. £14.10 outside UK. H.d.tv. Simple AA battery Distribution: Quadrant House, The Prize-winning aids charger. Quadrant, Sutton, Surrey SM2 5AS. for disabled. to Telephone 01 -661 3248. Newapproach ) Subscriptions: Oakfield House, instrumentation amplifier - Perrymount Road, Haywards Heath, Communications 2 5 design. Sussex RH16 3DH. Telephone: 04444 commentary Shaft encoder counting. 59188. Please notify a change of address. USA: $49.40 surface mail, $102.60 Antennas. Q Q airmail. Business Press International Philips embrace MAC. 83 , 87 (USA). Subscriptions Office, 205 E. 42nd Early radio. Street, NY 10117. New products svi,chroavne ic::e.;er Forth Mr control Overseas advertising agents: see Amateur awards. back page. mastering Super-fast floppy. Compact disc Mu d" dl USA mailing agents: Expediters of Feedback 42 Speech recognition. Robot elechunic <<; ., the Printed Word Ltd, 515 Madison Suite 917, New York, NY Add-on current dumps r. New 6800 with MMU. Remote- eostmuedtimer Avenue, Super -fast 16/32 -bit 10022, 2nd class postage paid at New Indoor loop aerial. York. Postmaster - send address to the Maxwell. processor. See p.56 for full description of this above. cover illustration. ©Business Press International Ltd 1986. ISBN 0043 6062 www.americanradiohistory.com RADIOCODE CLOCKS LTD SPECIALISTS IN ATOMIC TIME, FREQUENCY AND SYNCHRONISATION EQUIPMENT NEW PRODUCTS MINIATURE RUBIDIUM OSCILLATOR MODULE Lower power, fast warm up, optional output frequencies, programmable frequency offsets. RUBIDIUM FREQUENCY STANDARD High performance, compact and rugged instrument. 2U rack or' /, MR case options. INTELLIGENT OFF -AIR FREQUENCY STANDARDS Microcomputer controlled instruments, directly traceable to N.P.L., precision ovened local oscillator, comprehensive monitoring and status information, real time synchronisation. LOW COST MSF FREQUENCY STANDARD Instant operation, directly traceable to N.P.L., self- contained portable unit, no scheduled frequency changes, 24 hr transmission, real time synchronisation Off -air frequency Time code generators /readers " R ad i ocode standards Record /replay systems Intelligent time systems Intelligent display systems Clocks Ltd* Caesium /Rubidium based Precision ovened oscillators Unit 19, Parkengue, clocks & oscillators Time /frequency distribution Kernick Road Industrial Estate, Penryn, Master/slave systems systems Falmouth, Cornwall. Tel: Falmouth (0326) 76007 ( "A Circuit Services Associate Co.) CIRCLE6O Ft)If FURTHER DETAILS. Z80 CONTROL Z80 CARDMASTER CPU 416 Mhz Z80 CPU Sowter CP /M compatible 111 User transparent MULTI -TASKING Up to 32K EPROM & 16K RAM Watchdog crash Transformers protection., in the design and manufacture of several RS232 & RS422 Comms With over 45 years' experience 2' Z80a PIO (one uncommitted) hundred thousand transformers we can supply: On board bus buttering Nv Power -on jump hardware AUDIO FREQUENCY Euro -card constuction TRANSFORMERS OF EVERY TYPE The CPU card is supplied with a powerful three -way operating system.