| | VOLUME 15 No. 1 JANUARY 1979
CONSTRUCTIONAL PROJECTS
GUITAR SOUND MULTIPROCESSOR-2 by M. A. Sawicki M.Sc.(Eng.) and A. Kowalewski
Filters and board construction 18
A.D.S.R. ENVELOPE SHAPER by D.J. Stephenson
interesting sounds from versatile envelope control 32
P.E. MICROPRINTER-1 by Mark Simon
40 column electrosensitive printer 38
NOUGHTS AND CROSSES GAME by Kenneth Amor
OXO by CMOS 46
LOGIC TESTER by N. D. Jones
Four function TTL test probe 63
GENERAL FEATURES
INGENUITY UNLIMITED
A Simple Thermometer-Auto Tape Switch-TV Alerts-Tops and Tails-Kettle Whistle 29
STRICTLY INSTRUMENTAL by K. Lenton-Smith
Pedal Clavier, Stop Switching, Opto ideas, 8' Pedal 36
ELECTRIC VEHICLES by Mike Abbott
What was, what is, and what may come 52
SEMICONDUCTOR UPDATE by R. W. Coles
A look at some recently released devices 60
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 24
SPACEWATCH by Frank W. Hyde
Radio Telescope, Mars, Space Debris, Nobel Prize, 400M Years Ago, Shuttle Engine 37
NEWS BRIEFS
Micro' Extension 44
Electric Chariot Race-When The Blood Flows-Substitute 741 45
POINTS ARISING
Power Supply Unit 5O
READOUT
A selection of readers letters - 59
MORE TO THE POINT
New component standard for P.E. 64
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 67
PATENTS REVIEW
Thought provoking ideas on file at the British Patents Office - 68
OUR FEBRUARY ISSUE WILL BE ON SALE FRIDAY, 12 JANUARY 1979 (for details of contents see page 51)
VOLUME 15 No. 2 FEBRUARY 1979
CONSTRUCTIONAL PROJECTS
PULSE GENERATOR by M. Tooley BA. and 0. Whitfield BA.
A versatile piece attest equipment for trouble-shooting digital circuits 18
ENVIRONMENTAL THERMOMETER by M. Plant
A three range instrument capable of measuring temperatures from -15°C to +50°C 22
P.E. MICROPRINTER-2 byMarkSimon
Driver circuits, power supplies, construction and software 34
GUITAR SOUND MULTIPROCESSOR-3 by M. A. Sawicki M.Sc(Eng) and A. Kowalewski
VU driver, p.s.u. and switch control module 48
STEREO MIXER by J. P. Macaulay
Line and dynamic microphone inputs over three channels 62
GENERAL FEATURES
HOME COMPUTERS by R. W. Coles
The Microprocessor miracle 28
INGENUITY UNLIMITED
Versatile Timer-Heads or Tails-Novelty Doorbell 6-12V Convertor-Envelope Shaper 44
SEMICONDUCTOR UPDATE by R. W.Coles
A look at some recently released devices 47
MICROBUS by D.J.D.
A bi-monthly focus on micros for the home constructor 59
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 25
SPACEWATCH by Frank W. Hyde
High Energy Astronomical Observatory-2, Another Goonhilly, Ice Sheets 43
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 55
PATENTS REVIEW
Thought provoking ideas on file at the British Patents Office 56
NEWS BRIEFS
1978 Audio Writer is P.E. Contributor-New Olde Magazine 61
BOOK REVIEWS 68
BREADBOARD COMPETITION RESULTS 68
POINTS ARISING
R.C. Motor Control 68
READOUT A selection of readers letters 68
OUR MARCH ISSUE WILL BE ON SALE FRIDAY, 9 FEBRUARY 1979 (for details of contents see page 67)
VOLUME 15 No. 3 MARCH 1979
CONSTRUCTIONAL PROJECTS
LOGISCOPE by R.A. Penfold
Gives logic levels and mark space ratio/frequency data 18
SEQUENCER-1 by Lindsay Robinson
Enables sixteen bits to be programmed into a synthesiser 22
DIGITAL ENLARGING EXPOSURE METER by A.A. Luha B.Sc.
For black and white prints without waste 34
P.E. MICROPRINTER-3 byMark Simon
Final part covers testing and routine maintenance 44
HEADLIGHT WARNING DEVICE by P. G. Wagstaff
Dual purpose, for lights on, lights off 62
GENERAL FEATURES
BINAURAL STEREO PATENTS by Adrian Hope
A new look at a not so new stereo system 28
HOME COMPUTERS-2 by R. W. Coles
Peripherals and software 46
CONSTANT CURRENT SOURCES by D. F. Bowers B.Sc.
Transistor, op.amp. and transconductance amp. methods 54
SEMICONDUCTOR UPDATE byR. W. Coles
A look at some recently released devices 59
INGENUITY UNLIMITED
Variable Pulse Delay-Ultrasonic Proximity Detector- Hazard Flasher Monitor-
Simple Phaser-Livewire-Car Intruder Alarm 66
NEWS AND COMMENT
EDITORIAL 17
POINTS ARISING
Noughts and Crosses Game-ADSR Envelope Shaper 20
SPACEWATCH by Frank W. Hyde
Death of Skylab, Tiros-N, Vela Pulsar, Holography, Venus 21
NEWS BRIEFS
Away with Contactors-Model Aircraft Radar 31
More Bubbles!-Five-Step A to D 41
TV or Scope-Fir Filters-Countdown 43
Walky Talky Terminal-Floppy Saddle for your PET-Printer-John Miller-Kirkpatrick 53
Cherry-Picker Boom Boon 64
Micro Courses-Take Over-Bubble Take Over-Power Supply Breaker-Video Library 70
MARKET PLACE
New products 32
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 42
BOOK REVIEWS 56
READOUT A selection of readers' letters 60
OUR APRIL ISSUE WILL BE ON SALE FRIDAY, 9 MARCH 1979 (for details of contents see page 65)
VOLUME 15 No. 4 APRIL 1979
CONSTRUCTIONAL PROJECTS
SEQUENCER-2 by Lindsay Robinson
Constructional details and use 31
NOVELTY BLEEPER DOORBELL by D.J. Folwell
Property I/O port signalling device 38
PHASER by D. S. Gibbs and l. M. Shaw, C. Eng., M.I.E.E.
Has six phase shift networks 50
AUTORANGING MULTIMETER-1 by Dr. Mark A. Sawicki and Alex. Kowaleski
Circuit and general theory 56
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles
A look at some recently released devices 21
INGENUITY UNLIMITED
Car Intruder Alarm-Signal injector-Sound-To-Light-Preamp-
Electronic Doorbell-Programmable Divider-Organ Rhythm Generator 22
BUBBLE MEMORIES by Dr.P. V. Cooper
Technology Update 40
MICROBUS by DJ.D. A bi-monthly focus on micro's for the home constructor 47
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 18
TANDY TRS8O LEVEL II REVIEW by A. A. Berk B.Sc., PhDSatCure
A ready to use microcomputer system 26
NEWS BRIEFS
Chip Records-Countdown 39
SPACEWATCH by Frank W. Hyde
Saturn Watch, The Rings of Uranus, Neptune and Pluto, Solar Activity, Norma 54
POINTS ARISING
Fuel Consumption Meter-Stereo Mixer 64
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 67
PATENTS REVIEW
Thought provoking ideas on file at the British Patents Office 68
READOUT A selection of readers' letters 69
BOOK REVIEWS 70
OUR MAY ISSUE WILL BE ON SALE THURSDAY, 12 APRIL 1979 (for details of contents see page 55)
VOLUME 15 No. 5 MAY 1979
CONSTRUCTIONAL PROJECTS
MICROPROCESSOR EVALUATION SYSTEM byD. S. Coutts
Introduction to the CP1 610 and its instruction set 18
SOUND TO LIGHT byBenj. Duncan
Sound to light modulator for discotheques 28
SOUND OPERATED SWITCH by M. Tooley BA. and D. Whitfield BA., M.Sc.
Clunk click 46
LOW-NOISE PRE-AMP by J. Gerrard
Designed for use with low output low impedance microphones 54
AUTORANGING MULTIMETER-2
CONCLUSION by Dr M. A. Sawicki and A. Kowalewski
Display board, p.c.b. construction and final setting up. 56
GENERAL FEATURES
VEHICLE INSTRUMENT DISPLAYS by B. Shepherd C.Eng.. F.LE.E.
Technology inroads 24
STRICTLY INSTRUMENTAL by K. Lenton-Smith
Hammond B-3000 36
SEMICONDUCTOR UPDATE by R. W. Coles
A look at some recently released devices 38
INGENUITY UNLIMITED
Cheap Thermometer-4 Wire-8 Way Bell System-CMOS Logic Probe-Varitone Stylophone 68
NEWS AND COMMENT
EDITORIAL 17
PATENTS REVIEW
Thought provoking ideas on file at the British Patents Office 37
MARKET PLACE
New products-At The All-Electronics Show-DMM Review 41
SPACEWATCH by Frank W. Hyde
Canada, More about Venus, Skylab, Growth of Satellite Communications 44
NEWS BRIEFS
Countdown-HigherSpeed, Lower PowerTTL-Hams Rally 45
Final Phase-Ferrite-Clad Aerials-Rapid Recall Move-Nascom Club 53
Development System 55
POINTS ARISING
Microprinter-Sequencer 45
MK 14 REVIEW
A remarkable little micro kit 50
I.C. INSERTION TOOL information 65
INDUSTRY NOTEBOOK by Nexus What's happening inside industry 66
OUR JUNE ISSUE WILL BE ON SALE FRIDAY, 11 MAY 1979 (for details of contents see page 67)
VOLUME 15 No. 6 JUNE 1979
CONSTRUCTIONAL PROJECTS
SOUND TO LIGHT-2 CONCLUSION By BenJ. Duncan
Contruction and lighting displays 26
CINE SPEED CONTROLLER by M. Yeomans
Projector speed stabilisation 34
MICROPROCESSOR EVALUATION SYSTEM-2 by D. S. Cootts
Construction and testing 42
ULTRASONIC REMOTE CONTROL by M. Plant and G. Hallam
Universal 40kHz system 50
WORKSHOP P.S.U. by S. Hoare
60V-1A ranges-meterless test gear 56
GENERAL FEATURES
OHIO SUPERBOARD II REVIEW by A.A. Berk B.Sc., Ph.D.
First good look at this long awaited system 18
SEMICONDUCTOR UPDATE by R. W. Coles
A look at some recently released devices 25
R.F.I. SUPPRESSION IN P.S.U.s by B.E. Taylor
Guidelines to successful design 54
INGENUITY UNLIMITED
Low Cost Thermometer-Guitar Fuzz/Sustain Unit-Lamp Dimmer-
Stereo Peak Detecting PPM-Boat Speed Controller 65
MICROBUS by D.J.D.
A bi-monthly focus on micro's for the home constructor 68
NEWS AND COMMENT
EDITORIAL 17
PATENTS REVIEW
Thought provoking ideas on file at the British Patents Office 31
SPACEWATCH by Frank W. Hyde
Venus 11 and Venus 12, Trouble for Scatha, UK-6 Britain's special stargazer 32
WATCH OFFER 33
NEWS BRIEFS
Countdown 38
British Satellite-Marshall's Bristol Move 39
Frequency by Time-Teachers to Study-Cut Price Watches-David Cohen 55
POINTS ARISING
TRS 80 Review-Metronome-Phaser-Champ-Prog 39
MARKET PLACE
New products 40
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 48
BOOK REVIEWS 55
OUR JULY ISSUE WILL BE ON SALE FRIDAY, 8JUNE 1979 (for details of contents see page 49)
VOLUME 15 No. 7 JULY 1979
CONSTRUCTIONAL PROJECTS
SOUND TRIGGERED FLASH byR.A. Penfold
With variable delay 18
STROBOSCOPE by G. Brown Ph.D.
For the study of dynamic systems 24
MICROPROCESSOR EVALUATION SYSTEM-3 by D. S. Coutts
Programming (Conclusion of series) 43
METERMATE by P. A. Spurgeon
High impedance unit for use with multimeters 58
SWITCHED TONE TREBLE BOOST by J. D. Rogers
Quick n easy for the fast working guitarist 64
GENERAL FEATURES ELF II by A.A. Berk B.Sc., Ph.D.
Review of this popular, modular computer 34
INGENUITY UNLIMITED
Logic Probe Injector-Modification for the RE Sportscentre 40
SEMICONDUCTOR UPDATE by R. W. Coles
A look at some recently released devices-ICL 8063, HA 5195, BB 212 42
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 22
NEWS BRIEFS Countdown-Advanced Clv Chassis-Telephones 1984 Style 33
Casual Computers-Glass Keyboard-BAEC-Finance for innovation 39
IC Master 48
Micro Courses-New RAM-Cosmac Club-Sky Voices-Terminal Case 53
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 38
POINTS ARISING
Ingenuity Unlimited (May 1979) 48
PATENTS REVIEW
Peak Listening Time 51
SPACEWATCH by Frank W. Hyde
Jupiter and Voyager 1, Jupiter Sling Shot, Mars 52
READOUT
A selection of readers' letters 54
DOLOMITI MULTIMETER SPECIAL OFFER 57
P.E. AT BAZAAR 68
OUR AUGUST ISSUE WILL BE ON SALE FRIDAY, 13 JULY 1979 (for details of contents see page 63)
VOLUME 15 No. 8 AUGUST 1979
CONSTRUCTIONAL PROJECTS
HOME FREEZER ALARM byP. E. Chaplin
Early warning of an expensive thaw 18
AF/RF SIGNAL GENERATOR by J. Gerrard
Simple test gear for field servicing 21
COMPUKIT UK 101-PART 1 by A. A. Berk, B.Sc. Ph.D.
Single board computer with resident BASIC 24
CLASS A HEADPHONE AMPLIFIER by Stephen Price
Quality headphone listening 62
CHIMESONIC by P. E. Copeland
Door chime with retunable melody modules 66
GENERAL FEATURES
MICROBUS by D.J.D.
A bi-monthly focus on micros for the home constructor 42
SEMICONDUCTOR UPDATE by P. W. Coles
A look at some recently released devices-INS 8295, MK 4816, µA7BMGU1C 45
INGENUITY UNLIMITED
Lightning Chess Timer-TTL Oscillator-D.C. Ringing for Intercoms-
Shorted Turns Detector-Sound Operated Flash-Meter for Electrolytics 46
SOLDERS AND SOLDERING by P. Dinsdale
Industrial theory and practice plus advice for the amateur 50
NEWS AND COMMENT
EDITORIAL 17
SPACEWATCH by Frank W. Hyde
Astronomy Satellite, UV Explorer, Shuttle, Second Fleetsatcom, Venus, Fall of Skylab 33
MARKET PLACE
New products 34
Spring Trade Shows 36
NEWBEAR 77-78 by P. Birnie
Review of a ready to use microkit 38
NEWS BRIEFS
Flicker to Fluorescent-No Cause for Alarm-Countdown-Return of Steam-B.A,E,C. Hon. Sec. Move Japanese Production in USA-Yorkshire Computer Club-A Fluke Occurrence-Fast Delivery 53
Fight-It-Yourself 65
PATENTS REVIEW
Torsional Metering-Doughnut Damping 54
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 57
READOUT
A selection of readers' letters 58
BOOK REVIEWS 70
POINTS ARISING
Metermate-Autoranging Multimeter-Guitar Sound Multiprocessor-Constant Display Frequency Meter-
Ultrasonic Remote Control-Sound Operated Switch 70
OUR SEPTEMBER ISSUE WILL BE ON SALE FRIDAY, 10 AUGUST 1979 (for details of contents see page 61)
VOLUME 15 No. 9 SEPTEMBER 1979
CONSTRUCTIONAL PROJECTS
6 CHANNEL MIXER-1 by S. H. W. Grainger and C. H. Harding
Combines unbalanced signal sources for a well balanced output 18
WAVEFORM GENERATOR by Michael Tooley B.A. and David Whitfield B.A., M.Sc.
Sine, Square and Triangular Waves from 1 Hz to 100kHz 28
COMPUKITUK101-Part2 by A.A. Berk B.Sc., Ph.D.
Construction and BASIC definitions 40
SMOOTH FUZZ by D.S. Gibbs and I.M. Shaw C.Eng.
Refined distortion for the discerning musician 62
GENERAL FEATURES
INGENUITY UNLIMITED
Adsr Envelope Shaper-Car Theft Alarm-Diode Tester 24
ACORN COMPUTER by Mike Abbott
Review of 6502 based micro housed on Eurocards 34
STRICTLY INSTRUMENTAL by K. Lenton-Smith
Synth Drums, Vocoder, RE. Rhythm Unit, Chips 51
V.LF. SIGNALS AND THE MAGNETOSPHERE by C. H. Francis B.Sc.
Learn about the magnetosphere in readiness for next month's v.I.f. receiver project 52
SEMICONDUCTOR UPDATE byR. W. Coles
A look at some recently released devices-74AS/74ALS 82S106/7 ICL7600/5 67 69
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 26
POINTS ARISING 32
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 33
NEWS BRIEFS
Countdown-Move--Colour without mask 37
Joint memories-Two new micro's-Carrot grows bigger-Babes in headphones-In depth defence 68
SPACEWATCH by Frank W Hyde
Finding a clear window, Radio and optical studies, Red shift key to quasars, Solar power satellites 38
MOTOROLA MICROCOMPUTER FORUM byD.J.D.
Technological progress since the 6800 39
FREE ENTRY COMPETITION
Win some breadboarding from Lektrokit 67
PATENTS REVIEW
Auto-Focus-Stereo via Cable TV 70
OUR OCTOBER ISSUE WILL BE ON SALE FRIDAY, 'I4SEPTEMBER 1979 (for details of contents see page 61)
VOLUME 15 No. 10 OCTOBER 1979
CONSTRUCTIONAL PROJECTS
SOLID STATE INSTRUMENTS by Michael Tooley BA. and David Whitfield BA., M.Sc.
Battery Voltage Indicator-1. First of a series 24
DIGITAL TEMPERATURE CONTROLLER by D. Coutts and P. McAllister 32
V.L.F. RECEIVER by C. A. Francis B.Sc.
Listen to Sferics, Tweeks and Whistlers 42
6 CHANNEL MIXER-2 by S. A. W. Grainger and C. A. Harding
Wiring and final setting up 50
COMPUKIT UK101-Pan 3 by A. A. Berk B.Sc., Ph.D.
Error codes, program recording and playback, running BASIC 56
GENERAL FEATURES
SEMICONDUCTOR UPDATE byR W Coles A look at some recently released devices-MM74C911/7, CL7611 23
INGENUITY UNLIMITED
Freezer Temperature Alarm-Digital Servo Amplifier-Fridge/Freezer Thermostat-
Sequential Light Chaser-Motion Detector 37
MICROBUS by D.J.D.
A bi-monthly focus on micro's for the home constructor 67
SCHMITT TRIGGER CIRCUITS by D. F. Bowers B.Sc. 72
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 18
Chicago Consumer Electronics Show 20
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 22
Using the I.C. Removal Tool 30 EWS BRIEFS
Electronic Club at Margate-On Course-Automatic Fare Collection 30
SPACEWATCH by Frank W. Hyde
More about Jupiter, interesting lo, Galilean Satellites 48
PATENTS REVIEW
Class A Transistor Amplifier 54
COUNTDOWN 62
CB IN THE UK by Dr. Mark Sawicki 66
READOUT A selection of readers' letters 70
OUR NOVEMBER ISSUE WILL BE ON SALE FRIDAY, 12 OCTOBER, 1979 (for details of contents see page 65)
VOLUME 15 No. 11 NOVEMBER 1979
CONSTRUCTIONAL PROJECTS
SOLID STATE INSTRUMENTS by Michael Tooley BA. and David Whitfield B.A., M.Sc.
No. 2 REV. COUNTER 18
BABYCOM by D. N. Bishop
Shift register remote monitoring 24
COMPUKIT UK1O1 by A. A. Berk B.Sc., Ph.D.
Conclusion of series 28
DIAMATIC by J. A. W. Ames
Programmable Audio Visual Unit 32
QUIZMASTER by I. J. Nicolle
Unbiased indicator for rapid answer contests 60
DIGITAL DARKROOM TIMER by R.J. Morris
Two range timer for home colour printing 66
GENERAL FEATURES
LEARN BASIC THIS WAY by A. Ferguson
... and enjoy it 42
SEMICONDUCTOR UPDATE by R. W. Coles
A look at some recently released devices-ULA 2U000 AD7525 NE586/7 51
INGENUITY LIMITED ouch switches for games chip-Transducer oscillator-Sound to light sequencer-
Parity for ASCIIA peak program indicator-Display tube/TTL interface-
Simple TTL read only memory 52
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New products 22
NEWS BRIEFS
Intelligence prints backwards-One-chip colour TV system 27
POINTS ARISING 27
COUNTDOWN 31
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 41
SPACEWATCH by Frank W. Hyde
Record for Russia, Man-machine interface, Crystals, Circumterrestrial space, Telescopes 59
PATENTS REVIEW
The Aphex sound-Rear-view radar 69
READOUT
A selection of readers' letters 70
SPECIAL OFFER-PROTO-BOARD KIT 71
OUR DECEMBER ISSUE WILL BE ON SALE FRIDAY, 9 NOVEMBER 1979 (for details of contents see page 65)
VOLUME 15 No. 12 DECEMBER 1979
CONSTRUCTIONAL PROJECTS
EPROM PROGRAMMER-1 by A.A.Berk B.Sc., Ph.D.
Memory-mapped peripheral for the 2708 family 24
ULTRASONIC BURGLAR ALARM by Gilbert Davies
Versatile movement detection system 34
DIAMATIC-2 by J. A. W. Ames B.Sc. and W. L. Blyth B.Sc.
Programmable Audio Visual Unit, construction and setting up 40
COST-A-CALL CALCULATOR by A. P. Donleavy
Keep a check on your phone bill 65
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles 78000 7110 AY-3-1350 23
MICROBUS by D.JD.
Seven programs/variations for Mk 14 68
INGENUITY UNLIMITED
Audio Millivoltmeter-Hex Keyboard For SC/MP-Tele-Games Mod-DC/DC Voltage Multiplier 72
NEWS AND COMMENT
EDITORIAL 17
MARKET PLACE
New Products 18
COUNTDOWN 29
POINTS ARISING
Digital Temperature Controller-6 Channel Mixer 29
PATENTS REVIEW
Precipitation Sensor-Liquid Magnet 30
SPACEWATCH by Frank W. Hyde
UKIRT--Shuttle Schedule 39
INDUSTRY NOTEBOOK by Nexus
What's happening inside industry 47
SEIKO WATCH OFFER 61
READOUT
A selection of readers' letters 62
NEWS BRIEFS
Prestel testing the international market 70
INDEX FOR VOLUME 15 78
SPECIAL SUPPLEMENT
SOLID STATE CAR INSTRUMENTS by Michael Tooley BA, and David Whitfield BA., M.Sc. 48
No. 3 Ammeter-No. 4 Temperature Gauge-No. 5 Dwell Meter -Hazard Warning and Cascading.
OUR JANUARY ISSUE WILL BE ON SALE FRIDAY, 14 DECEMBER 1979 (for details of contents see page 33)
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