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| VOLUME 14 No. 5 JANUARY 1978 CONSTRUCTIONAL PROJECTS RHYTHM GENERATOR by N. A. Cooke A low cost unit capable of 12 basic rhythms 322 BATTERY CONDITION INDICATOR by P. Scargill Tri-state car battery voltage monitor 330 BREADBOARDING SYSTEM by D. F. McGinley A versatile and inexpensive d.i.y. breadboard 339 ELECTRONIC DIE by I. J. Dillworth H format l.e.d. die with some unusual features 340 9 VOLT STABILISED P.S.U. by C. H. Banthorpe An overload protected 9V stabiliser for car cassette recorders etc 344 P.E. CHAMP-5 by R. W. Coles and B. Cullen The keyboard/display unit using a calculator 352 GENERAL FEATURES SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 332 FAULT FINDING by G.Loveday Introduction and component faults in simple circuits 333 INGENUITY UNLIMITED Simple Lie Detector-Tape Recorder Peak Level Indicator-XY Burn Eliminator-Model Train Speed Controller-Two Way/Two Wire Bell System-Touch Actuated Generator-Timesetting For The MK50250 347 NEWS AND COMMENT EDITORIAL 321 STRICTLY INSTRUMENTAL by K. Lenton-Smith Keyboard instruments at the British Musical Instrument Trade Fair 329 SPACEWATCH by Frank W.Hyde Soyas/Salyut, Soviet Meteor 2, Intelstat 5 336 MARKET PLACE Interesting new products 346 POINTS ARISING Burglar Alarm-Frequency Counter/Timer 357 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 358 CHROMA-CHIME KIT REVIEWED The assembly and performance of this computerised doorbell 360 NEWS BRIEFS GEC Computer For RN lB-Solar Water Heaters-IBC 361 INDUSTRY NOTEBOOK What's happening inside industry 362 READOUT A selection of readers' letters 366 BOOK REVIEWS Selected new books we have received 366 Our February issue will be on sale Friday, 13 January, 1978 (for details of contents see page 351)
VOLUME 14 No. 6 FEBRUARY 1978 CONSTRUCTIONAL PROJECTS AUTO-RANGING VOLTMETER by S. Roberts A useful piece of test gear that leaves your hands free 400 STRENGTH METER by N. Riddiford A game to test your grip 412 P.E. CHAMP-6 by R. W. Coles and B. Cullen CHOMP firmware put under the microscope 422 RHYTHM GENERATOR by N. A. Cooke Construction and final setting up 432 GENERAL FEATURES SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 411 INGENUITY UNLIMITED Telephone Monitor 437 FAULT FINDING-2 by G. Loveday Trouble shooting complete systems 445 NEWS AND COMMENT EDITORIAL 399 KIM I REVIEW Report on another new microprocessor 408 NEWS BRIEFS Microcomputer Kit-Watts On The Road-Exhibition 417 MARKET PLACE Interesting new products 418 SPACEWATCH by Frank W. Hyde U.F.O.s, Life And Death From Outer Space, Landsat 421 MICRO-BUS by DJD A bimonthly focus on micro's for the home constructor 429 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 438 PATENTS REVIEW The history of the gramophone 441 BOOK REVIEWS Selected new books we have received 448 Our March issue will be on sale Friday, 10 February, 1978 (for contents see page 407)
VOLUME 14 No. 7 MARCH 1978 CONSTRUCTIONAL PROJECTS P.E. STRING ENSEMBLE-1 by A. J. Boothman P.S.U./Tone Generator 482 P.E. CHAMP-7 by R. W. Coles and B. Cullen Putting Champ to work 491 DIGITAL LAP COUNTER by S. Morgan Useful addition for model car layout 504 NICAD BATTERY CHARGER by E. A. Parr Assures a full charge with no overcharging problems 508 AUTOMATIC ENLARGER TIMER by M. Dix Darkroom aid for black and white enlargements 518 GENERAL FEATURES FAULTFINDING-3 by G.Loveday Triac and thyristor circuits 500 MATRIX MARKER Custom designed tool 507 NOMOGRAPHS FOR I.C. TIMERS by E. A. Parr Enables quick selection of component values 512 INGENUITY UNLIMITED Car brake light failure indicator-Up-Down Counter 521 SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 525 NEWS AND COMMENT EDITORIAL 481 MARKET PLACE Interesting new products 490 NEWS BRIEFS Sound 78 International Systems Interference-HiFi Show-MPU Courses 496,516 POINTS ARISING P.E. Champ-Car burglar alarm 503 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 506 SPACEWATCH by Frank W. Hyde Two spacecraft to Venus 517 READOUT A selection of readers' letters 520 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 526
Our April issue will be on sale Friday, 10 March, 1978 (for details of contents see page 499)
VOLUME 14 No. 8 APRIL 1978 CONSTRUCTIONAL PROJECTS FUMBLE NUDGE GAME by A. R. Cuff A contest of speed and manual dexterity for two players 564 P.E. CHAMP-8 by R. W. Coles and B. Cullen CHAMP-PROC--A PROM programming attachment for Champ 582 P.E. STRING ENSEMBLE-2 by A. J. Boothman Keyboard, keyswitch and diode gating assemblies 592 ELECTRONIC KEYSWITCH by S. V. Essex An electronic lock using CMOS 601 GENERAL FEATURES EXTRA DESIGN IDEAS-INGENUITY UNLIMITED Fast Ni-Cad Battery Charger-Versatile V.C.O.-741 Tester-Double Tremolo Unit-Quiz Master-Magnetic Tape Speedometer-Helipot Substitute-Car Lights On Indicator-Simple Car Tachometer 568 FAULT FINDING-4 by G. Loveday Handling and testing i.c.s. 577 SEMICONDUCTOR UPDATE by R. W. Co/es A look at some recently released devices 591 MICRO-BUS by D.JD. A bi-monthly focus on micro's for the home constructor 605 NEWS AND COMMENT EDITORIAL 561 MARKET PLACE Interesting new products 562 BOOK REVIEWS 581 NEWS BRIEFS Ring A Rig-Traffic Computer 589 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 590 SPACEWATCH by Frank W. Hyde Forthcoming missions, new hot line systems, Soviet cargoship 608 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 609 Our May issue will be on sale Friday, 14 April 1978 (for details of contents see page 604)
VOLUME 14 No. 9 MAY 1978 CONSTRUCTIONAL PROJECTS MOVING LIGHTS DISPLAY by C. J. Bowes A basis for telecasting or animating the Christmas lights 642 P.E. STRING ENSEMBLE-3 by A. J. Boothman Chorus System description and construction details 648 RANDOM DECISION UNIT by P. D. Scargill I'll build it-I'll build it not-I'll build it . 660 TTL TEST CLIP by P. A. Birnie A neat pocket sized project 664 WORKSHOP POWER SUPPLY UNIT by I. Hickman Supplies up to 25 volts at 1 amps 672 P.E. CHAMP-9 by R. W. Coles and B. Cullen CHAMP-PROG construction and PROMPT 676 GENERAL FEATURES SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 663 INGENUITY UNLIMITED-MINISONICS SPECIAL 666 ELECTRIFYING TIME by M. E. Theaker From pith balls to the atomic clock 669 NEWS AND COMMENT EDITORIAL 641 READOUT A selection of readers' letters 646 STRICTLY INSTRUMENTAL by K. Lenlon-Smith Get better with Wersi 647 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 654 MARKET PLACE Interesting new products 658 SPACEWATCH by Frank W. Hyde Salyut, Soyuz and Progress 662 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 671 Our June issue will be on sale Friday, 12 May, 1978 (for details of contents see page 657)
VOLUME 14 No. 10 JUNE 1978 CONSTRUCTIONAL PROJECTS LINEAR CAPACITANCE METER by A. A. Luha A battery powered instrument for the home lab 722 KILN CONTROLLER by G. I. Williams For protection of both workpieces and kiln from overheating 732 CHAMP-1O by R. W. Coles and B. Cullen Using CHAMP-PROG and construction of CHAMP-U.V. (Conclusion of series) 735 HEADPHONE AMPLIFIER by J. P. Macaulay A flexible stereo system 744 TEMPERATURE PROBE by R. W. Jones An accessory for use with analogue or digital voltmeters 746 STRING ENSEMBLE-4 by A. J. Boothman Voice Circuitry 752 BATTERY VOLTAGE MONITOR by S. V. Essex Gives visible indication of battery condition 758 GENERAL FEATURES SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 751 MICROBUS by D.J.D. A bi-monthly focus on micro's for the home constructor 760 INGENUITY UNLIMITED Musical Calculator-Stereo Expander/Compressor-Waveform GeneratorSimple Waa-WaaSpeed Controller 769 NEWS AND COMMENT EDITORIAL 721 SPACEWATCH by Frank W. Hyde Skylab, Cosmos 954, Shuttle, Jupiter 727 INVENTORS COMPETITION Your chance to win financial backing and a 'scope for your ideas 728 KIT REVIEW OF LEADER 103 P.S.U. Assembly and performance 730 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 741 MARKET PLACE Interesting new products 742 SEEN AT THE IEA-ELECTREX EXHIBITION 748 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 766 READOUT A selection of readers' letters 750 POINTS ARISING Digital Multimeter-Auto Ranging D.C. Voltmeter 750 Our July issue will be on sale Friday, 9 June 1978 (for details of contents see page 765)
VOLUME 14 No. 11 JULY 1978 CONSTRUCTIONAL PROJECTS P.E. TV GAME CENTRE-1 Ten ball games and four motorcycle games in colour 810 GENERAL PURPOSE TIMER by M. Plant An accurate wide range timer with both audio and visual alarms 826 STRING ENSEMBLE-5 by A. J. Boothman Cabinet construction 834 DIMWIT by M. J. Carter A bedside lamp that can be simply switch programmed 842 C.R.O. LOGIC MONITOR GENERATOR by R. Derry Serially displays logic states of i.c.s under test 838 GENERAL FEATURES INGENUITY UNLIMITED Prom programmer-Radio Control Servo Tester-Overflow indicator 832 TOMORROW'S BROADCASTING by Dr. Boris Townsend Audio/Visual projections 854 SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 860 NEWS AND COMMENT EDITORIAL 809 MARKET PLACE Interesting new products 817 SPACEWATCH by Frank W. Hyde Soviet activity, Salyut mission, Future plans, Black hole?, Comets 820 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 825 NEWS BRIEFS IERE Conference-Sony Launch Betamax 846 Compilers for Micros, Laser for Nasa, Card Counting, Automated Blinds, Standards 852 INVENTORS COMPETITION Last chance to win financial backing and a 'scope for your ideas 850 READOUT A selection of readers' letters 853 Our August issue will be on sale Friday, 14 July 1978 (for details of contents see page 849)
VOLUME 14 No. 12 AUGUST 1978 CONSTRUCTIONAL PROJECTS TOUCH SWITCH by G. Davis Direct replacement for a mains light switch 890 P.E. TV GAME CENTRE-2 Concludes with construction and setting up 892 DIGITAL THERMOMETER byM.Plant Measurement range of -99.9°C to +99.9°C. Single LSI chip simplifies construction 896 MOTOR SPEED CONTROLLER by R. F. Mack You set the speed which the controller maintains irrespective of loading 916 12V CONVERTOR by D. J. Bradbury Enables a 24V iron to be powered from a car battery 924 CONSTANT DISPLAY FREQUENCY METER by J. Becker Monitors frequency without flicker 934 GENERAL FEATURES MICROPROCESSOR REVIEW-AMICOS by P. Birnie Kit review of this 6800 system 906 P.C.B. ASSEMBLY JIGS by W. English 909 MAKING P.C.Bs by A. R. Damper 910 INGENUITY UNLIMITED Envelope Shaper-pH Meter-Touch Sensitive Keyboard-Calculator-Decade Counter=CMOS Doorbell-Trace Multiplier-Led. Flasher 920 SEMICONDUCTOR UPDATE by R. W. Coles A look at some recently released devices 930 MICROBUS by DJ.D. A bi-monthly focus on micro's for the home constructor 932 NEWS AND COMMENT EDITORIAL 889 Spacewatch by Frank W. Hyde Out of the Ecliptic, Sun Shivers, Uranus, Landsat, Halley's Comet 901 NEWS BRIEFS Heat Pipe device-Eagle's Launch-New Microprocessors- 902 ink Jet System 905 MARKET PLACE Interesting new products 912 READOUT A selection of readers' letters 918 BOOK REVIEWS Selected new books we have received 918 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 919 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 931 POINTS ARISING Linear Capacitance Meter 938 Our September issue will be on sale Friday, 11 August 1978 (for details of contents see page 929)
VOLUME 14 No. 13 SEPTEMBER 1978 CONSTRUCTIONAL PROJECTS ANALOGUE COMPUTER-1 by P.J. Kronis BSc Mathematical operations and circuits 970 COMBINATION LOCK by E.A.Parr Double combination for added security 990 THERMOSTAT CONTROL by M.Edmunds For the photographer who does his own developing 1002 SOUNDTRACK MONITOR byJ . Schmid Alerts the operator when the end of a recording is reached 1006 METRONOME by M. Butt Simple emphasised beat unit 1010 KEYBOARD by L. G. Parkin BA Provide an eight bit binary word by pressing two keys 1014 GENERAL FEATURES WAVE ENERGY by M.Abbott Can the sea provide the UK with electricity? 976 STRICTLY INSTRUMENTAL by K. Lenton-Smith Signetics TDA 1008 electronic music i.c. 988 INGENUITY UNLIMITED Simple Clock-Beethoven's Doorbell-Electronic Combination Lock-Distortion AssessmentProtection for a Model Train Speed Controller-Simple Alarm 993 SEMICONDUCTOR UPDATE by R.W Coles A look at some recently released devices 998 NEWSAND COMMENT EDITORIAL 969 READOUT A selection of readers letters 974 BOOK REVIEWS Selected new books we have received 980, 1013 MARKET PLACE Interesting new products 985 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 1001 SPACEWATCH by Frank W.Hyde Soyus-29 and Salyut-6, USSR Launchings, India and the USSR, GOES-3, Place in Space 1005 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 1020 Our October issue will be on sale Friday, 8 September 1978 (for details of contents see page 975)
VOLUME 14 No. 14 OCTOBER 1978 CONSTRUCTIONAL PROJECTS P.E. V.D.U. SYSTEM-1 by A. A. Berk, B.Sc., Ph.D. Up to date "one chip" memory mapped system 1054 FUEL CONSUMPTION METER By J. McCarthy An aid to economy, suitable for most cars 1080 HIGH PERFORMANCE POWER SUPPLY UNIT by R. Lawrence, B.Sc. Voltage control down to zero, plus current limiting 1070 ANALOGUE COMPUTER-2 by P.J Kronis, B.Sc. Construction details 1074 TWO RANGE TIMER by J. D. Jardine A portable, inexpensive general purpose unit 1088 GENERAL FEATURES IMPEDANCE by Toby Bailey and Bob Whitaker Do you understand it? 1066 MICROBUS by D.J.D. A bi-monthly focus on micros for the home constructor 1098 INGENUITY UNLIMITED Capacitor Continuity Tester-Synthesiser Repetitive Waveform Generator - Simple Fuzz Accenting Metronome-Stereo Indicator - External Input Unit for Synthesisers 1080 NEWS AND COMMENT EDITORIAL 1049 MARKET PLACE New products 1050 SPACEWATCH by Frank W. Hyde Pluto, More from the USSR, Copernicus discovers Black Hole 1053 POINTS ARISING Linear Capacitance Meter, Dimwit, Kiln Controller 1058 BOOK REVIEWS 1084 NEWS BRIEFS Strain Gauge-Big Brother Check-Micro Power Pack-Computers Galore Club 1087 Underground Cameras-Steam Advice-Here's To Progress 1090 Teletext Course 1094 Disc Full of Holes 1102 HOW TO USE YOUR FREE STICKIES 1093 INDUSTRY NOTEBOOK by Nexus What's happening inside industry 1097 PATENTS REVIEW Thought provoking ideas on file at the British Patents Office 1100 READOUT A selection of readers' letters 1102 Our November issue will be on sale Friday, 13 October 1978, price 5Op (for details of contents see page 1059)
VOLUME 14 No. 15 NOVEMBER 1978 CONSTRUCTIONAL PROJECTS Moon landing game 1138 P.E. VDU System-2 1146 Proximity Switch 1160 Analogue Computer-3 1165 Wide Range C/R Bridge 1180 GENERAL FEATURES Power FETs 1154 Ingenuity Unlimited 1154 NEWS AND COMMENT Editorial 1137 Spacewatch 1144 NEWS BRIEFS MARKET PLACE new products SEMICONDUCTOR UPDATE 1179 STATESIDE SCENE New York News 1182 INDUSTRY NOTEBOOK 1186 PATENTS REVIEW 1187 READOUT 1188 POINTS ARISING 1188 8 PAGE SUPPLEMENT - CAR DEVICES: 1164 - 1165 VOLUME 14 No. 16 DECEMBER 1978 CONSTRUCTIONAL PROJECTS P.E. VDU system-2 1228 ANALOGUE COMPUTER-4 1236 SAFETY PLUG 1240 GUITAR SOUND MULTIPROCESSOR-1 1246 RADIO CONTROL FAILSAFE 1260 R.C. MOTOR CONTROL 1262 GENERAL FEATURES FARNBOROUGH '78 1234 MICROBUS 1252 IMPEDANCE-2 1257 INGENUITY UNLIMITED 1266 DEMICONDUCTOR UPDATE 1270 NEWS AND COMMENT EDITORIAL 1227 MARKET PLACE 1231 NEWS BRIEFS POINTS ARISING 1241 SPACEWATCH 1242 SPECIAL OFFER 10+10 amplifier kit 1245 READOUT 1254 INDUSTRY NOTEBOOK 1271 PATENTS REVIEW 1272 INVENTORS COMPETITION RESULTS 1278 BREADBOARD EXHIBITION 1278
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