VOLUME 13 No. 1 JANUARY 1977

CONSTRUCTIONAL PROJECTS

RADIO CONTROL SYSTEM-1 by G. D. Southern

Simple Coder/Decoder for use with four control channels 18

CAR EXHAUST MONITOR by E. BalI & R. A. Crane

Rectify inefficient running with this indicator for unburnt gas 21

MICROPHONE MIXER by A. S. Wilson

A versatile two-channel stereo/four channel mono mixer 36

POWER OUTPUT METER by H. T. Kitchen

A useful instrument for the audio test-bench 46

GENERAL FEATURES

MEMORIES-1 by A. Briar

A general account of IC. devices for information storage and retrieval 26

THERMAL RESISTANCE & DERATING OF DEVICES by C. Rudd

Heat dissipation from semiconductor junctions 30

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 35

INGENUITY UNLIMITED

Dual Power Supply-Burglar Alarm-Graphic Level Display-Sound Operated Flash-Active

Crossover-CMOS Oscillator-Guitar Fuzz-Squarewave Oscillator-Cycle Lighting 54

NEWS AND COMMENT

EDITORIAL - To Aid The Motorist 17

BOOK REVIEWS

Selected new books we have received 24

SPACEWATCH by Frank W. Hyde

Second Year of Ariel Five 25

POINTS ARISING

Simple Touch Dimmer 30

MARKET PLACE Interesting new products 32

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 45

NEWS BRIEFS

Obedient Car-Summer School-Audio Fair '17 53

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 65

READOUT

A selection of readers' letters 66

FREE ENTRY MICROPROCESSOR COMPETITION 31

Our February issue will be on sale on Friday, January 7,1971

(for details of contents see page 53).

 

VOLUME 13 No. 2 FEBRUARY 1977

CONSTRUCTIONAL PROJECTS

SOLAR HEATING CONTROLLER by G. I. Williams

An automatic controller for a circulating pump 98

RADIO CONTROL SYSTEM-2 by G. D. Southern

The decoder and final adjustments 102

MILLIVOLTMETER by D. W. Easterling

A battery-powered ac/d.c. instrument 120

SEVEN-SEGMENT DISPLAY FOR OSCILLOSCOPES by L. M. Newell

An inexpensive unit generating numerals 0-9 126

I. C. SNAP by P. D. Scargill

A simple card game gues electronic 132

GENERAL FEATURES

MEMORIES-2 by A. Briar

This final article discusses Read Only Memories and Charge Coupled Devices 108 SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 119

NOISE SOURCES by D. Maynard

Investigating possible causes and ways of keeping noise down to a minimum 134

INGENUITY UNLIMITED

Polyphonic Keyboard System-Automatic Car Aerial-Car Overheat Indicator-Over-Voltage Protector-Digital Logic Checker-Percussion Effects-Simple Compressor-Clock DisplayHead or Tails 136

NEWS AND COMMENT

EDITORIAL - The Sunny Side 97

POINTS ARISING

Cine/Tape Synchroniser-Random Tone Generator 101

BOOK REVIEWS

Selected new books we have received 106

SPACEWATCH by Frank W. Hyde

Asteroid Numbered 1976 UA-Largest Radio Telescope-Pluto-Mars 107

COMPUTER HOBBIES in the U.S. by Roger Woolnough

A report on this new pastime for amateur electronics constructors in the States 115

NEWS BRIEFS

Amateur Tape Award-Permanent Magnet Machine-Scanner 116

MARKET PLACE

Interesting new products and catalogues 124

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 130

MICROPROCESSOR FORUM FOR CONSTRUCTORS

Details of a P.E., National and Marshall's joint sponsored event 131

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 145

READOUT

A selection of readers' letters 146

Our March issue will be on sale on Friday, February 11, 1977

(for details uf special Free wallchart and other contents, see page 125)

 

VOLUME 13 No. 3 MARCH 1977

CONSTRUCTIONAL PROJECTS

pH METER-1 by K. E. Langford

The first of a two-part article explaining in simple terms the meaning of pH, how it is measured, and giving constructional details 178

CONSTANT VOLUME INTERCOM by R. A. Penfold

A high sensitivity Master/Slave system with a.v.c. 184

AUTOWAH by P. J. Goodwin

An automatically triggered wah and swell pedal for guitarists 206

CAR SYSTEMS MONITOR by J. P. Seymour

A unit giving visible and audible warning of up to ten fault or alarm conditions 210

GENERAL FEATURES

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 192

MICROPROCESSORS EXPLAINED-1 by R. W. Coles

A vital introductory series dealing with the newest technology 199

INGENUITY UNLIMITED

Bench Power Supply-Acoustic Relay-Simple Servo-Sawtooth Triangle Converter-Thermal A.G.C.-Computer Voice-Tuning Fork-Economical Relay-Logic Probe-Digital to Analogue Converter-Simple Power Supply Regulator 217

NEWS AND COMMENT

EDITORIAL-Microprocessors 177

SPACE WATCH by Frank W. Hyde

The Sun-Outer Planets-Comet Intercept 188

SELLING MICROPROCESSORS

Reports from two recent Seminars 191

BOOK REVIEWS

Selected new books we have received 191

FORUM

Important News of the "Microprocessor Forum for Constructors" 195

NEWS BRIEFS

Airborne-Call from New Zealand-Fibre Links-Russian First 195

SC/MP REVIEWED by R. W. Coles

A user's first experiences of constructing this kit 196

MICROVISION TV Pocket receiver for European and US standards 198

INDUSTRY NOTEBOOK by Nexus -

What's happening inside industry 209

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 214

FREE WITH THIS ISSUE
DIODE IDENTICHART

Our April issue will be on sale on Friday, March II, 1977

(for details of special supplement and other contents, see page 205)

 

VOLUME 13 No. 4 APRIL 1977

CONSTRUCTIONAL PROJECTS

DIGITAL VOLTMETER by A. J. Buxton

A mains powered 3f-digit d.c. digital voltmeter using the Ferranti ZNA116 ic. 258

DAY INDICATOR by M. H. George

This unit uses CMOS logic and displays the day of the week on a row of l.e.d.s. 266

pH METER-2 by K. E. Langford

Constructional details, calibration, and f.e.t. alternative input stage, How to use the meter and where to get the electrodes 288

TRANSIENT GENERATOR by R. Gwinn

An envelope shaper circuit giving keyboard triggered transient profiles for driving v.c.a.s and v.c.f.s 296

GENERAL FEATURES

SEMICONDUCTOR UPDATE by R.W. Coles

A look at some recentry released devices 265

MOBILE DISCO TECHNIQUES-1 by N. McLeod

Equipment and operating techniques for the disco enthusiast 270

INGENUITY UNLIMITED

Bistable Touch Switch-D.C. Motor Speed Controller-Initial Reset 279

MICROPROCESSORS EXPLAINED-2 by R. W. Coles

A vital introductory series dealing with the newest technology 280

PROGRAMMING A MICROPROCESSOR by D. B. Johnson-Davies

Step by step instructions, based on the SC/MP kit 299

NEWS AND COMMENT

EDITORIAL-The Essence of Constructing 257

SPACEWATCH by Frank W. Hyde -

Faster and Faster-Space Spying-Russian Activities 269

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 286

NEWS BRIEFS

Microprocessors at Seminex '77-Alex Marshall 298, 306

POINTS ARISING

Cine/Tape Synchroniser-Games Machine - Car Exhaust Monitor-Solar Heating System Controller 306

SPECIAL 8-PAGE SUPPLEMENT

PUTTING IT TOGETHER A practical guide for constructors 1-8

Our May issue will be on sale on Thursday, April 7,1977

(for details of special free booklet and other contents, see page 287)

 

VOLUME 13 No. 5 MAY 1977

CONSTRUCTIONAL PROJECTS

ORGAN TREMOLO UNIT by L. F. Reeve

A solid state phase modulator for electronic organs 338

BURGLAR ALARM by P. J. Fasoli

A sensitive amplified bridge design 342

ONE ARM BANDIT by K. Amor

A scaled down version of the popular gaming machine 359

DARKROOM TIMER by A. Koltai & G. S. Brimble

An accurate, reliable timer with digital readout 366

GENERAL FEATURES

MICROPROCESSORS EXPLAINED-3 by R. W. Coles

The instruction set and programming techniques 346

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 355

MOBILE DISCO TECHNIQUES-2 by N. McLeod

Equipment and operating techniques for the disco enthusiast 372

INGENUITY UNLIMITED

TV Tennis Score-Motor Driver-Programmable Melody Generator-Joanna Modification 376

NEWS AND COMMENT

EDITORIAL-New Voice for Components industry 337

NEWS BRIEFS

DIY Computing Conference-All Electronics Show-Sound '77 Exhibition-Microprocessor Forum 345

SPACEWATCH by Frank W. Hyde

Venus-Infra Red Telescope-Landsat 352

MICROPROCESSOR REPORT

Products discussed at a Cambridge Seminar 356

MARKET PLACE

Interesting new products 370

STRICTLY INSTRUMENTAL by K. Lenton-Smith

Electronic music matters 371

POINTS ARISING

Digital Voltmeter-Putting It Together-Solar Heating Controller-Hazard Warning FlasherpH Meter 382

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 385

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 386

Our June issue will be on sale Friday, May 13, 1977

(for details of contents see page 365)

 

 

VOLUME 13 No. 6 JUNE 1977

CONSTRUCTIONAL PROJECTS

SOUND TO LIGHT CONVERTER by M. Hadley

A three channel unit which is simple and cheap to build. Mains interference is negligible as zero voltage switching is used 418

CAR LIGHTS REMINDER by D. J. Saunders

Gives audible warning of lights left on 432

TV SPORTCENTRE by A. M. Marshall

A versatile games unit for your TV 434

ELECTRONIC DIE by G. Jones

Features touch operation, a novel counter and led, display 448

GENERAL FEATURES

MICROPROCESSORS EXPLAINED-4 by R. W. Coles

Peripheral chips: memories 426

HANDLING CMOS DEVICES by L. J. Gallace & H. L. PujoI

The physics of breakdown in CMOS devices and simple rules on how to avoid it 452

INGENUITY UNLIMITED

Night Light Latch-Fluorescent Light Inverter-"Trimphone" Warbler-Seven Segment Weekdays 456

NEWS AND COMMENT

EDITORIAL-Not Totally Binding 417

NEWS BRIEFS

Bionic Voice-IERE Secretary 424

SPACEWATCH by Frank W. Hyde

Shuttle Trials-Uranus Rings-Jupiter-Black Cloud 435

INTERCEPT JUNIOR REVIEWED by R. W. Coles

A user's experience of this microprocessor development and tutorial system 442

POINTS ARISING

Low Cost Radio Control system-Autowah-Random Number Games Machine 445

READOUT

A selection of readers' letters 451

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 454

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 455

Our July issue will be on sale Friday, June 10, 1977

(for details of contents see page 425)

 

VOLUME 13 No. 7 JULY 1977

CONSTRUCTIONAL PROJECTS

EARTH LEAKAGE CIRCUIT BREAKER by K. A. Smith

An electronic, current-operated protection unit for photographic darkroom, workshop or garden safety 488

TWIN TRACE DOUBLER by A. A. Penfold

Four trace display for a double beam oscilloscope 496

POCKET STOPWATCH by M. W. Headington

A state of the art digital stopwatch for sporting events 508

SYNTHESISER TUNING INDICATOR by C. Yallop

Silent tuning aid for synthesisers and organs 522

GENERAL FEATURES

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 495

MICROPROCESSORS EXPLAINED-5 by R. W. Coles

Peripheral Chips: Input/Output Devices 515

INGENUITY UNLIMITED

Solar Panel Controller-Touch Switch-Side-Light Controller-Sequential Timer 531

NEWS AND COMMENT

EDITORIAL-Time Is The Essence 437

D2 KIT REVIEWED by D. B. Johnson-Davies

A report on the new Motorola D2 microprocessor pack 500

MICROPROCESSOR COMPETITION

A list of prize winners 507

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 514

NEWS BRIEFS

Video Disc '77-Teach-in-Pilot's Eyes 524

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 527

MARKET PLACE

Interesting new products 528

Our August issue will be on sale Friday, July 8, 1977

(for details of contents, see page 521)

 

VOLUME 13 No. 8 AUGUST 1977

CONSTRUCTIONAL PROJECTS

P.E. MASTERMIND-1 by P. F. Turney

A choice of two electronic versions of the popular code-breaking game 562

C/R METER by A. A. Penfold

A simple-to-calibrate, wide-range capacitance/resistance meter 560

CLOCK AUTO DIMMER by E. B. Eves

A general-purpose display dimmer circuit 586

PELICAN CROSSING by D. Edwards

An educational road-safety working model 590

 

GENERAL FEATURES

SEMICONDUCTOR UPDATE by P. W. Coles

A look at some recently released devices 568

MICROPROCESSORS EXPLAINED-6 by A. W. Coles

Choosing a microprocessor-a buyer's guide" 570

INGENUITY UNLIMITED

Guitar Frequency Doubler-Random Light Display-Warning System-Guitar Tuning ReferenceLight-Control System-Simple Logic Probe-Low Cost VCA 598

 

NEWS AND COMMENT

EDITORIAL-A Game With Associations 561

READOUT A selection uf readers' letters 566, 585

BOOK REVIEWS Selected new books we have received 567

SCRUMPI KIT REVIEWED by D.B. Johnson-Davies

A report on this SC/MP-based kit from Bywood 577

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 584

NEWS BRIEFS

Microprocessor Symposium-Build-Your-Own Computer Conference 588

MARKET PLACE Interesting new products 589

PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 596

SPACEWATCH by Frank W. Hyde

Geos-X-ray Satellite-Voyager 597

BACK NUMBERS SERVICE-a special announcement 585

Our September issue will been sale Friday, 12 August, 1917 (for details of contents see page 559)

 

VOLUME 14 No. 1 SEPTEMBER 1977

CONSTRUCTIONAL PROJECTS

P.E. CHAMP-1 by R. W. Coles and B. Cullen

Introducing the Champ family-Development System, Programmer and Eraser 16

FREQUENCY COUNTER/TIMER by P. Leah

An accurate and economic piece of test equipment 22

ACTIVE 'SCOPE PROBE by B. Savage

A broad-band, high impedance probe with switchable gain 32

P.E. MASTERMIND-2 by P. F. Turney

Entry section of logic together with random generator, comparator and master clock are described 40

LINEAR OHMMETER by R. Harris

Enables accurate measurement of resistance up to 1OMc 46

GENERAL FEATURES

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 31

HIGH ACCURACY RECTIFIERS by D. F. Bowers

A survey of precision rectifier circuits based on operational amplifiers 53

INGENUITY UNLIMITED

Timer-Wiper Delay Unit-Transistorised Dynatron-High Impedance Audio Pre-Amp 56

NEWS AND COMMENT

EDITORIAL-And Now, Hands-on 15

NEWS BRIEFS

Video Recorder-Dublin Buses-Safety Abroad-Making History 20, 58

SPACEWATCH by Frank W.Hyde

Space Shuttle, Fulcrum of the Future 21

READOUT

A selection of readers' letters 39

STRICTLY INSTRUMENTAL by K. Lenton-Smith

VCO arrangements for synthesiser keyboards 49

MARKET PLACE

Interesting new products 50

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 52

POINTS ARISING

Burglar Alarm-Warning System 58

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 60

(The CR0 Logic Monitor Generator has been unavoidably held over)

Our October issue will be on sale Friday, 9 September, 1977 (for details of contents see page 45)

 

VOLUME 14 No. 2 OCTOBER 1977

CONSTRUCTIONAL PROJECTS

DIGITAL MULTIMETER by P. A. Birnie

A battery powered general purpose meter 90

P. E. CHAMP-2 by R. W. Coles and B. Cullen

A detailed look at the CHAMP circuitry and the 4040 MPU chip 105

GUITAR SUSTAIN UNIT by D. Gibbs and I. Shaw

Enables the length of a guitar note to be greatly extended without distortion 112

PE. MASTERMIND-3 by P. F. Turney

Description of the control circuit and introducing the scoring logic 120

GENERAL FEATURES

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 111

INGENUITY UNLIMITED Flash Trigger-Mains Touch Switch-Multichannel Overload Protector 128

NEWS AND COMMENT

EDITORIAL-Full measure; Fun and Games 89

SPACEWATCH by Frank W. Hyde

The Voyagers 98

MICRO-BUS by DiD

A new feature covering all aspects of microprocessors and minicomputers 101

POINTS ARISING

Sound Design-Linear Ohmmeter-Frequency Counter/Timer 111

IBA ENGINEERING CENTRE

Some of the experimental and development work on show at a recent series of open days 116

MARKET PLACE

Interesting new products 118

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 125

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 126

NEWS BRIEFS SERT

Microprocessor Symposium-Intelligent instruments 130

Our November issue will be on sale Friday, 7 October, 1977 (for details of contents and special 8 page supplement see page 119)

 

VOLUME 14 No. 3 NOVEMBER 1977

CONSTRUCTIONAL PROJECTS 128

NOTE SEQUENCER by D. G. Evans

A synthesiser pre-programmer for tunes of up to 32 pitches 162

DIGITAL REACTION TIMER by D. C. Green

Can give an index of relative reaction delays 166

TTL TESTER by T. J. Hill

A simple checker for quad-gate packages 172

P.E. CHAMP-3 by R. W. Coles and B. Cullen

Development system circuit description 185

P.E. MASTERMIND-4 by P. F. Turney

The scoring logic continued 192

GENERAL FEATURES

SEMICONDUCTOR UPDATE by R. W. Coles

A look at some recently released devices 176

ANALOGUE LOG AMPLIFIERS by D. F. Bowers

Design techniques and calculations 180

INGENUITY UNLIMITED

Wash-Wipe Controller-PA Preamplifier-Frequency Doubler-Car Systems Monitor-

Logic Probe-Sequence Generator-Counter-Clock Touch Switches 197

NEWS AND COMMENT

EDITORIAL-Window Gazing; A Choice Selection 161

NEWS BRIEFS

System X-Name Change 169

SPACE WATCH by Frank W. Hyde

Space Suits 170

BOOK REVIEWS

Selected new books we have received 171

MARKET PLACE

Interesting new products 175

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 179

PATENTS REVIEW

Thought provoking ideas on file at the British Patents Office 190

READOUT

A selection of readers' letters 206

SPECIAL 8-PAGE SUPPLEMENT

ICs FOR THE EXPERIMENTER

A roundup of some neoteric i.c. packages (between pages 184 and 185) 1-8

Our December issue will be on sale on Friday, 11 November, 1977 (for contents, see page 171)

 

VOLUME 14 No. 4 DECEMBER 1977

CONSTRUCTIONAL PROJECTS

CAR BURGLAR ALARM by M. J. O'Leary

Easy to install system which triggers the horn and lights 242

128 NOTE SEQUENCER by D. G. Evans

Final construction and use of the unit 246

P.E. CHAMP-4 by R. W. Coles and B. Cullen

Constructional details of CHAMP board and plinth 268

P.E. MASTERMIND-5 by P. F. Turney

Final section of the scoring logic is covered, together with the display logic 278

GENERAL FEATURES

INGENUITY UNLIMITED

Leading Zero Suppression-Polarity Protector-"True" Snap-Car Lights Alarm-Lamp Failure Indicator-Battery Condition Indicator 275

NEWS AND COMMENT

EDITORIAL-The Way Things Go-Non-Crystal Ball-Switching Off 241

MICRO-BUS by DJD

Real-time from the air, chess computer and cheap D/A converter 250

NEWS BRIEFS

Infrared Sound-Home TV Terminal-SERT Symposium 252, 260, 266

SPACEWATCH by Frank W. Hyde

Sails in The Sunset, Space Shuttle, Jupiter 253

MARKET PLACE

Interesting new products 254

SEMINAR

Two day course on MPU Systems design 255

INDUSTRY NOTEBOOK by Nexus

What's happening inside industry 256

HOME ENTERTAINMENT SHOW

Some of the attractions at this new exhibition 259

BOOK REVIEWS

Selected new books we have received 260,267

POINTS ARISING

Digital Reaction Timer 286

INDEX FOR VOLUME 13 263

Our January issue will be on sale Friday, 9 December, 1977

(for contents see page 245)

 

 

 

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