|
| ||||||||||||||
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 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 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)
| ||
| Send this page address - CLICK HERE - to a friend ! |