| | VOLUME 18 No. 1 JANUARY 1982
CONSTRUCTIONAL PROJECTS
INDECISION ELIMINATOR by W. C. Dickson .. .. .. .. 22
Every civil servant should have one!
TV CAMERA Part 1 by Philip Gaffney .. .. .. .. .. .. 26
Monochrome camera with uhf, modulated output
PE RANGER BASE STATION Part 1 by Michael Tooley B.A. and David Whitfield M.A., M.Sc. 32
Increases r.f. output to 4W
PE BANDBOX Part 3 by Alan Boothman B.Sc. .. .. .. .. 37
Construction of system and display boards
DUAL DIGI-DICE by Tom Gaskell BA . . . . 51
Another project incorporated in our Digital Design Techniques series
PE CAR COMPUTER Part 2 by P. MacFarlane .. .. .. .. .. 58
Fitting of flow and speed sensors
PE ROBOTS Part 3 by Richard Becker and Tim Orr .. 64
Mobile wheel base, motor control, display board and manual control keyboard
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles .. .. 25
Featuring 1804 WTVOO8
DIGITAL DESIGN TECHNIQUES Part 6 by Tom GaskelI B.A . .. .. .. 48
Numerical Systems
MICROBUS by D. J D. .. .. .. .. .. .. 72
Hardware and software ideas for hobby computers
NEWS AND COMMENT
EDITORIAL .. .. .. . .. .. .. .. 17
NEWS & MARKET PLACE 18
Including Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus 21
What's happening inside industry
SPACEWATCH by Frank W. Hyde .. .. .. .. .. .. .. .. 29
Extra-terrestrial activities
SPECIAL OFFER -PCB DRILL .. .. .. .. .. .. .. 35
A quality tool at a bargain price
WHAT CB? 39
Pull-out guide to legal rigs
PATENTS REVIEW .. .. . .. .. .. .. . .. .. .. 63
OUR FEBRUARY ISSUE WILL BE ON SALE FRIDAY, 8th JANUARY 1982
(for details of contents see page 31)
VOLUME 18 No. 2 FEBRUARY 1982
CONSTRUCTIONAL PROJECTS
MINIATURE SCORPIO CAR IGNITION by Mike Rees .. .. .. .. .. 20
Updated and scaled-down version of a popular design
BENCH PSU .. .. .. .. .. .. .. .. .. .. 26
A protected and metered supply giving up to 30V and 2A
INFRA-RED REMOTE CONTROL Part 1 by Bart Trepak 32
Ideal for power operated garage doors
TV CAMERA Part 2 by Philip Gaffney . .. 42
Video and Logic boards construction
PE RANGER BASE STATION Part 2 by Michael Tooley BA and David Whitfield MA. MSc .. 48
Construction
PE ROBOTS Part 4 by Richard Becker, Tim Orr and Richard Monkhouse .. .. 52
The processor board, infra-red receivers, solenoid controller and control base p.c.b.s
PE BANDBOX Part 4 by Alan Boothman BSc .. .. .. .. .. .. 62
Conclusion of series
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles .. .. .. .. .. .. .. 25
Featuring WD2123 OP-27
DIGITAL DESIGN TECHNIQUES Part 7 by Tom GaskelI BA .. .. .. .. 36
When Analogue meets Digital
MICROPROMPT .. .. .. .. .. .. .. .. 60
Hardware and software exchange point for PE computer projects
NEWS AND COMM ENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. 10
NEWS & MARKET PLACE .. .. .. .. .. .. .. .. 16
Including Countdown
INDUSTRY NOTEBOOKbyNexus .. .. .. .. .. .. .. .. 19
What's happening inside industry
SPACEWATCH by Frank W. Hyde .. .. .. .. .. .. .. .. 41
Progress of the shuttle
POINTS ARISING .. .. .. .. .. .. .. .. .. .. 51
Space Evaders
ATENTS REVIEW .. .. .. .. .. .. .. .. .. 66
OUR MARCH ISSUE WILL BE ON SALE FRIDAY, 12th FEBRUARY 1982.
(for details of contents see page 31 )
VOLUME 18 No. 3 MARCH 1982
CONSTRUCTIONAL PROJECTS
TELECTRIC ELECTRICITY COST MONITOR Part 1 by Stephen Day BSc Eng MIEE .. 22
Can provide instant and long-term cost monitoring of almost any electrical appliance
EMERGENCY LIGHT by Stephen lbbs . .. 28
Rechargeable, with automatic cut-in
FREE TRANSISTOR PROJECTS .. .. .. .. .. 32
Six circuits specially designed around your free transistors
AUTO LIGHT, CAR BATTERY CONDITION INDICATOR, AF/RF GENERATOR,
BENT WIRE GAME, DOUBLE SIREN, LIQUID ALARM
INFRA-RED REMOTE CONTROL Part 2 by Bart Trepak .. .. .. .. .. 40
Construction and applications
PE RANGER BASE STATION Part 3 by Michael Tooley BA and David Whitfield MA MSc .. 44
Testing and alignment
PE ROBOTS Part 5 by Richard Becker, Tim Orr and Richard Monkhouse .. 56
Resume, completion of hardware, and software prologue
TV CAMERA Part 3 by Philip Gaffney .. .. .. .. .. .. 62
Assembly and setting up
GENERAL FEATURES
DIGITAL DESIGN TECHNIQUES Part 8 by Tom Gaskell BA .. .. .. .. 48
Memories and Microelectronics
MICROBUS by D.J.D . .. .. .. .. .. .. .. .. .. 60
Use of micros in amateur radio
SEMICONDUCTOR UPDATE by R. W. Coles .. .. .. .. .. .. 66
Featuring LM 1035 99000 Series 8X60
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. 17
NEWS & MARKET PLACE .. .. .. .. .. .. .. 18
Including Countdown
INDUSTRY NOTEBOOK by Nexus .. .. .. .. .. .. 21
Reflections on the past year
PATENTS REVIEW .. .. .. .. .. .. .. .. .. 64
New ideas from around the world
SPACEWATCH by Frank W. Hyde .. .. .. .. 68
Extra-terrestrial activities chronicled
OUR APRIL ISSUE WILL BE ON SALE FRIDAY, 12th MARCH 1982
(for details of contents see page 39)
VOLUME 18 No. 4 APRIL 1982
CONSTRUCTIONAL PROJECTS
STEREO CASSETTE DECK Part 1 18
The latest separate for the PE Quasar Stereo System
ULTRASONIC VISION SYSTEM Part 1 by jeremy Bentham and Fred Bentham 24
A radar style outlook for your computer
ENLARGER TIMER by Tom GaskelI BA .. .. .. .. .. .. .. 32
Photographic aid for the darkroom
MEDIUM RESOLUTION GRAPHICS by N.A. Climpson .. .. .. .. 41
User definable 4-times resolution for UK 101
PE ROBOTS Part 6 by Richard Becker, Tim Orr and Richard Monkhouse . . .. . 46
Conclusion-software, construction and wiring
TELECTRIC ELECTRICITY COST MONITOR Part 2 by Stephen Day BSc Eng MIEE .. 58
Microprocessor circuitry and software; constructional details
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W.Coles . .. .. .. .. 39
Featuring MC146818 TDS 934 6600
STRICTLY INSTRUMENTAL by K. Lenton-Smith .. .. .. .. .. .. 52
History of an organ pioneer
MICROPROMPT .. .. .. .. .. .. .. 54
Including a 48 x 32 video conversion for UK1O1
INGENUITY UNLIMITED 61
Overload cutout for thyristor speed control-Button selector-Switch de-bounce-Quality mic amplifier-9V power supply-Octave bank for VCOs-Sound-to-light converter
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. 13
NEWS & MARKET PLACE .. .. .. .. 14
Including Countdown and Points Arising
THE MACROCHIP .. .. .. .. .. .. .. .. 28
Hot news of a piece of innovative technology
INDUSTRY NOTEBOOK by Nexus 30 Going off the rails?
SPECIAL OFFER-LOUDSPEAKERS .. .. .. .. 31
Hi-fi speakers at a very low price
BAZAAR .. .. .. .. .. .. .. .. .. 45
Buy, sell and swap service for readers
SPECIAL OFFER-CASSETTES , . .. .. .. .. .. .. .. 51
Starting a regular bargain offer on high quality cassettes
READOUT .. .. .. .. .. .. .. .. 53
Readers criticism and praise
SPACEWATCH by Frank W. Hyde .. .. .. .. .. .. .. 66
PATENTS REVIEW .. .. .. .. .. .. .. .. .. .. 68
SPECIAL SUPPLEMENT
FREE TRANSISTOR PROJECTS .. .. .. .. .. between pages 40 & 41
Logic probe, Light Delay Unit, Car Lights Reminder, Battery Monitor, Soil Moisture Meter, Snap Indicator
OUR MAY ISSUE WILL BE ON SALE THURSDAY, 8th APRIL 1982
(for details of contents see page 23)
VOLUME 18 No. 5 MAY 1982
CONSTRUCTIONAL PROJECTS
FREQUENCY METER AND PRESCALER by Stephen Ibbs .. .. 24
Digital readout to 200MHz with 600MHz option prescaler
PROGRAMMABLE TIMER/CONTROLLER Part 1 by T. J Johnson . . . .. .. 32
Digital clock/controller for mains operated appliances
SIGNATURE ANALYSER by A. Trebar .. .. .. .. .. .. .. 42
An instrument for testing and debugging digital circuitry
FUNCTION GENERATOR by Andy Flind 50
Provides sine, square and triangular waves throughout the audio range
STEREO CASSETTE DECK Part 2 .. .. .. .. .. .. .. .. 57
Construction and testing
ULTRASONIC VISION SYSTEM Part 2 by Jeremy Bentham .. .. .. .. 66
Software, setting up and conclusion
GENERAL FEATURES
SEMICONDUCTOR UPDATE by A. W. Coles .. .. .. .. . .. 49
Featuring LM363 TL783 74HC Series
MICROBUS by O.J.D. .. .. .. .. .. .. .. . .. 62
ZX8O and ZXS1 ideas
INGENUITY UNLIMITED .. .. .. .. .. .. .. .. .. 68
12W FET PA-Morse tone detector-Bandpass filter-Electronic multimeter
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 17
NEWS & MARKETPLACE .. .. .. .. .. .. .. 18
Including two-page Test Gear Special
INDUSTRY NOTEBOOK by Nexus .. . . .. .. .. .. 23
What's happening inside industry
BAZAAR .. .. .. .. .. .. .. 29, 47, 54
Buy, sell and swap service for readers
SPECIAL OFFER-SPEECHTIME CLOCK KIT .. .. .. .. .. .. 41
Extra-low price for this innovative design
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. 46
Regular bargain offer on high quality cassettes
SPACEWATCH by Frank W. Hyde .. .. .. .. .. .. .. .. 55
Extra-terrestrial activities chronicled
SPECIAL OFFER-LOUDSPEAKERS .. .. .. .. .. .. .. .. 65
Hi-fi speakers at a very low price
PATENTS REVIEW .. .. .. .. .. .. .. .. .. 72
SPECIAL SUPPLEMENT
AUTOMATIC TEST EQUIPMENT by 0. Mandelzweig .. .. .. between pages 40 & 41
The IEEE bus and its applications
OUR JUNE ISSUE WILL BE ON SALE FRIDAY, MAY 14th 1982
(for details of contents see page 31)
VOLUME 18 No. 6 JUNE 1982
CONSTRUCTIONAL PROJECTS
MICROSYNTH Part 1 byA. R Bradford MSc .. .. .. .. .. .. 18
Combines versatility in performance with cost effectiveness
MPG METER by Lionel Taylor . . . . . . . . . . . . . . 26
Provides accurate indication of fuel use
AUTO FLASH SLAVE by R. A. Penfold .. .. .. .. .. .. .. 32
Triggers as light from main flashgun ceases
EXPERIMENTERS BREADBOARD WITH POWER AND PULSE GENERATOR byj Slack 38
An invaluable aid to experimenters working with i.c.s
D.C. POWER CONTROLLER by Michael Tooley BA .. .. .. .. .. 46
Provides efficient control of power from d.c. supplies in the range 5 to 15V
PROGRAMMABLE TIMER/CONTROLLER Part 2 by T. J Johnson .. . . .. 52
Battery back up and programming
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Colas .. .. .. .. 37
Featuring MK3824/3821 RC4191 27128
MICROPROMPT .. .. .. .. .. .. .. .. 42
Hardware and software ideas for PE computer projects
E/MONITOR REWORKED by RogerDerry . .. .. .. .. 43
Make your UK101's extended monitor easier to use
INGENUITY UNLIMITED 58
Mic operated sound-to-light-Temperature alarm-Alarm clock-
Micro output controller-Static detector-Car battery discharge indicator-
Trailer lamp monitor
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 13
NEWS & MARKET PLACE 14
Including Countdown and Points Arising
BAZAAR .. .. .. .. .. .. .. .. .. .. .. 25, 36, 56
Buy, sell and swap service for readers
INDUSTRY NOTEBOOK by Nexus 35
An improvement in morale
READOUT .. .. .. .. .. .. .. .. .. .. .. 36
Our readers air their views
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. .. .. 49
Regular bargain offer on high quality cassettes
SPACEWATCH by Frank W. Hyde .. .. .. .. .. .. .. .. 51
Extra-terrestrial activities chronicled
PATENTS REVIEW .. .. .. .. .. .. .. .. .. .. 62
SPECIAL SUPPLEMENT
SOUND SYNTHESIS byA. A. Bradford MSc .. .. .. .. between pages 36 & 37
All the basics necessary to choose and use synthesisers
OUR JULY ISSUE WILL BE ON SALE FRIDAY, JUNE 11th 1982
(for details of contents see page 31)
VOLUME 18 No. 7 JULY 1982
CONSTRUCTIONAL PROJECTS
ACTIVE SPEAKER SYSTEM by J. Macaulay .. .. .. .. 16
High quality speaker design
AUDIO TEST SET Part 1 by Michael Tooley BA and David Whitfield MA MSc 26
Designed specifically for testing and setting up a wide range of audio equipment
INSTRUMENT TUNER by Stephen lbbs 32
Five octaves of accurate tone generation
MICROSYNTH Part 2 by A. R. Bradford MSc .. .. .. 38
VCOs, VCF, VCA, power amplifier and power supply
AUTOMATIC SIGNAL SWITCHING by AndrewParr .. .. .. .. 42
Two-aspect colour light control
AUTOMATIC DIAMOND CROSSING CONTROL by Andrew Parr .. .. 47
Safety interlock for a dangerous junction
INFRA-RED TAPE CONTROL by Chris Lare .. .. .. .. .. .. 56
Remote control recording and replay
VERSATILE CAR ALARM by Michael Tooley BA .. .. . .. 62
Protect your car.
BURGLAR DETERRENT by R.A.Penfold .. .. .. .. .. .. 68
... and your house
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W.Coles .. .. .. .. .. .. 24
Featuring: MF1O CA33000 SA6000
MICROBUS by D.J.D. .. .. .. .. .. .. .. .. .. 50
Life-Dice Puzzle-Drawing Stars
INGENUITY UNLIMITED .. .. .. .. .. .. .. .. .. 54
Invaders 127-Car Alarm
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. 11
NEWS & MARKET PLACE 12
Including Countdown and Points Arising
BAZAAR .21,46,52,61,71
Buy, sell and swap service for readers
INDUSTRY NOTEBOOK by Nexus 23
News and views on the electronics industry
SPACEWATCH by Frank W. Hyde 35
Review of the latest shuttle flight
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. 53
Regular bargain offer on high quality cassettes
PATENTS REVIEW 72
Audio ideas
OUR AUGUST ISSUE WILL BE ON SALE FRIDAY, JULY 9th, 1982
(for details of contents see page 25)
VOLUME 18 No. 8 AUGUST 1982
CONSTRUCTIONAL PROJECTS
COMPREHENSIVE HOME ALARM SYSTEM by Gilbert Davies .. .. .. 14
ULTRASONIC-8 metre range, operating at 327kHz
RADAR-30 metre range, operating at 10.687GHz
INFRA-RED-18 metre range, covering 12 zones
COMBO AMPLIFIER Fart 1 by Fred Judd and E.A. Rule 26
The preamplifiers: their performance and construction
MICROSYNTH Part 3 by A. R. Bradford MSc 36
Setting up the synthesiser with test programs
AUTOMATIC PHOTOGRAPHER by M.J.A. Turner .. .. .. .. .. .. 42
If it moves-snap it
AUDIO TEST SET Part 2 by Michael Tooley BA and David Whitfield MA MSc .. .. .. 48
Conclusion, including measurement examples
GENERAL FEATURES
MICRO-PROFESSOR REVIEW by Michael Tooley BA .. .. . . .. .. .. 32
An in-depth analysis of this Z80 based teaching computer
SEMICONDUCTOR UPDATE by R. W. Coles 47
Featuring CV3GOTLO6B 5AB8256A
STRICTLY INSTRUMENTAL by K. Lenton-Smith .. .. .. .. .. .. 54
The wonder of Casio
MICROPROMPT .. .. .. .. .. .. .. .. .. .. 56
Hardware and software ideas for PE computer projects
INGENUITY UNLIMITED 62
Courtesy light delay-CB "Roger Bleep"-Loudspeaker de-thump
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 11
NEWS & MARKET PLACE .. .. .. .. .. .. .. .. .. 12
Including Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus .. .. .. .. .. .. .. .. 25
News and views on the ever changing electronics industry
BAZAAR .. .. .. .. .. .. .. .. .. .. 41,52, 55
Free readers' advertisements
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. .. 45
Regular bargain offer on high quality cassettes
SPACEWATCH by Frank W. Hyde .. .. .. .. .. .. .. .. 61
Extra-terrestrial activities chronicled
PATENTS REVIEW .. .. .. .. .. .. .. .. .. 64
Ingenious ideas from around the world
OUR SEPTEMBER ISSUE WILL BE ON SALE FRIDAY, AUGUST 13th, 1982
(for details of contents see page 40)
VOLUME 18 No. 9 SEPTEMBER 1982
CONSTRUCTIONAL PROJECTS
SEAT BELT REMINDER byDavidShortland .. .. .. 22
"Clunk click" unit
AUDIO DEBUG PROBE by Chris Lare 31
Portable fault finding probe
CB SCANNER by C.F.Shorto and M. Ward .. .. .. .. .. .. .. 36
Provides 40 channel mic. control
WAVEFORM DIGITISER by Lindsay Robinson BA Hons . . . . .. . . . 46
Will store a signal and display it at any time
COMBO AMPLIFIER Part 2 by Fred Judd and E. A. Rule . . . . . . . . . . . . 56
Power amplifier construction
GENERAL FEATURES
MENTA REVIEW by David VVhitfield MA MSc .. .. .. .. .. .. .. 16
Micro Electronic mNemonic Teaching Aid analysed
SEARCHWATER by Frank W. Hyde .. .. .. .. .. .. 28
Maritime reconnaissance radar of the future
SEMICONDUCTOR UPDATE by R. W. Coles .. .. .. .. .. .. .. 34
MICRO/T-11, TDA2009, TDA232OA, CDP1B71
MICROBUS by DJD .. .. .. .. .. .. .. .. .. 42
A bimonthly focus on micros for the home constructor
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 11
NEWS & MARKET PLACE 12
With Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus .. .. .. .. .. .. .. .. 15
News from the electronics industry
PATENTS REVIEW .. .. .. .. .. .. .. .. .. 20
Ingenious ideas from around the world
SPACEWATCH by Frank W Hyde .. . .. .. .. .. .. .. 26 E
xtra-Terrestial activities chronicled
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. .. 27
Bargain offer on VHS video and C90 audio cassettes
BAZAAR .. .. .. .. .. .. .. .. .. .. 30,44,61,62
Free readers' advertisement service
SPECIAL OFFER-LOUDSPEAKERS .. .. .. .. .. .. 45
Beat this for Videotone speakers
OUR OCTOBER ISSUE WILL BE ON SALE FRIDAY, SEPTEMBER 9th, 1982
(for details of contents see page 35)
VOLUME 18 No. 10 OCTOBER 1982
CONSTRUCTIONAL PROJECTS
DIGITAL STOPWATCH by T.J. Johnson .. .. .. .. 22
Four function high precision instrument
SEMI-PROFESSIONAL MIXER by Tim Orr .. .. .. .. 30
Circuit descriptions
AUDIO SWEEP OSCILLATOR by C. J Jordan .. .. 40
For real time bandwidth analysis
SECURITY CONTROLLER by John G. Leith .. .. .. .. 52
Home protection system
MINI CHORUS UNIT by R.A. Penfold .. .. .. .. .. .. .. 60
Effects unit for the vocalist or instrumentalist
COMBO AMPLIFIER by Fred Judd and E. A. Rule .. . . .. .. 66
Cabinet construction
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles .. .. .. .. .. 28
AD549, iAPX 186, TSC9403
ELECTROLUBE REVIEW .. .. .. .. .. .. 38
New p.c.b. process reviewed
INGENUITY UNLIMITED .. .. .. 56
'Challenge'-CMOS touch switch-Percussion synth-Stereo width control-Instant diode tester
MICROPROMPT .. .. .. 70
Hardware and software ideas for PE computer projects
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. 17
NEWS AND MARKET PLACE 18
With Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus 21
News and views from the electronics industry
USING THE I.C. INSERTION TOOL .. .. .. .. .. .. .. 27
Information
MICRO-PROFESSOR COMPETITION .. .. .. .. .. .. 39
Your chance to win a Z80 based micro
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. 49
Bargain offer on high quality cassettes
PATENTS REVIEW .. .. .. .. .. .. .. .. .. 50
BAZAAR .. .. .. .. .. .. 51,55
Readers free advertisements
SPECIAL OFFER-QUASAR CASSETTE .. .. .. .. .. 65
Low price cassette recorder kit
SPACEWATCH by F. W. Hyde .. .. .. .. .. 68
Fourth Columbia Mission, Getaway Specials
OUR NOVEMBER ISSUE WILL BE ON SALE FRIDAY, OCTOBER 8th, 1982
(for details of contents see page 29)
VOLUME 18 No. 11 NOVEMBER 1982
CONSTRUCTIONAL PROJECTS
MICROCONTROLLER Part 1 byM. Tooley BA and D. Whitfield MA MSc .. .. .. 20
Introduction and circuit description
ULTIMUM Part 1 .. .. .. .. .. .. .. .. 30
Computer Interface, Motherboard and p.s.u.
DMM by Martin Kent .. .. .. .. .. .. .. .. 42
A compact multimeter with digital readout
CB SYNTHESISER by Duncan HeadsSc(Hons) .. .. .. .. .. 47
Forty channel CB add on
SEMI-PROFESSIONAL MIXING DESK Part 2 by Tim Orr .. 58
Constructional details
GENERAL FEATURES USING YOUR FREE CABLE TIES 41
Information and applications
SEMICONDUCTOR UPDATE by R. W.Coles .. .. .. .. .. .. 57
Featuring the 1MS26000, X2816A, X2804A, S3610, S3620
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. 15
NEWS AND MARKET PLACE 16
Including Countdown and Points Arising
INDUSTRY NOTEBOOK by Nexus 29
News and views on the electronics industry
SPACEWATCH by Frank W. Hyde .. .. .. .. .. 40
Extra-terrestrial activities chronicled
BAZAAR .. .. .. .. .. .. .. 46, 64, 65
Free readers' advertisements
SPECIAL OFFER-CASSETTES .. .. .. .. .. 56
Bargain offer on high quality cassettes
SPECIAL SUPPLEMENT
MICRO-FlLE by R. W. Coles .. .. .. .. .. .. between pages 40 and 41
Introduction and 8080 and 8085A Filesheet 1
OUR DECEMBER ISSUE WILL BE ON SALE FRIDAY, NOVEMBER 12th, 1982
(for details of contents see page 39)
VOLUME 18 No. 12 DECEMBER 1982
CONSTRUCTIONAL PROJECTS
STYLOCHORD by Stephen Ibbs .. .. .. .. .. .. .. 22
Twin probe stylus organ
MICROGRASP PART 1 by Richard Becker .. .. .. 30
Computer controlled robot arm
ULTIMUM PART 2 .. .. .. .. 36
RAM and battery back-up boards
SEMI-PROFESSIONAL MIXING DESK PART 3 .. .. .. .. .. 44
P.S.U. and using the Desk
MICROCONTROLLER PART 2 by M. Tooley BA and D. Whitfield MA, MSc .. .. .. 50
P.S.U., Disbug and 6800 programming
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles .. .. .. .. .. .. .. 49
Featuring the MC1468705G2, D6OT, OP-22
INGENUITY UNLIMITED .. .. .. .. 61
Universal Probe-Disco Lights Sequencer
NEWS AND COMMENT
EDITORIAL .. .. .. .. .. .. .. .. .. .. .. 17
NEWS AND MARKETPLACE .. .. .. .. .. .. .. .. 18
Including Countdown and Points Arising
SPACEWATCH by F. W. Hyde .. .. .. .. .. .. .. .. .. 29
Extra-terrestrial activities chronicled
BAZAAR .. .. .. .. .. .. .. .. .. 35, 46, 47, 62
Free readers advertisements
INDUSTRY NOTEBOOK by Nexus 42
News and views on the electronics industry
SPECIAL OFFER-DIGITAL PULSER KIT .. .. .. .. .. .. .. 43
All-purpose pulser for TTL and CMOS
SPECIAL OFFER-CASSETTES .. .. .. .. .. .. .. 57
Bargain offer on high quality cassettes
PATENTS REVIEW .. .. .. .. .. .. .. .. .. .. 59
PIN bulletins and hi-fi
INDEX FOR VOLUME 18 64
SPECIAL SUPPLEMENT
MICRO-FILE by R. W. Coles .. .. .. .. .. .. between pages 42 & 43
OUR JANUARY ISSUE WILL BE ON SALE FRIDAY, DECEMBER 10th, 1982
(for details of contents see page 66)
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