| | VOLUME 16 No. 1 JANUARY 1980
CONSTRUCTIONAL PROJECTS
SCRATCH AND RUMBLE FILTER by R.A. Penfold 22
Reduce turntable and record surface noise
ULTRASONIC CLEANER 41
Cavitation cleaning for small objects
SCINTILLATING PENDANT by Owen Bishop 48
Electronic jewellery
R/C SERVO TESTER by C. A. Francis B.Sc. 50
Provides 0.5A/5V for miniature servo testing
EPROM PROGRAMMER-2 by A.A. Berk B.Sc., Ph.D. 55
Construction and interfacing
GENERAL FEATURES
SEMICONDUCTOR UPDATE 26
8294,2920, SL446A, SL441A
SOFTY REVIEW by A. A. Berk B.Sc Ph.D. 27
MPU development tool under the microscope
INGENUITY UNLIMITED 35
Simple Autofade-R/C Servo-Car Burglar Alarm-Phased White Noise-Glow Plug SupplyDisco Cross-Fader-Low Pass Filter
WIEGAND EFFECT-B. Dance M.Sc 39
New vehicle ignition technique
SWITCHING REGULATORS by D.L. H. Smith 64
Theory and suggested circuits
CALCULATOR CHIPS AS LOGIC DEVICES by P. A. Birnle 69
Circuits using the G.l. C683
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
New products
SPACEWATCH 32
Pioneer II, Magnetic Field, Tailpiece
SEIKO WATCH OFFER 34
INDUSTRY NOTEBOOK 47
Inside industry
PATENTS REVIEW 62
READOUT 63
A selection of readers' letters
NEWS BRIEFS 66,71
COUNTDOWN 71
OUR FEBRUARY ISSUE WILL BE ON SALE FRIDAY, 11 JANUARY 1980 (for details of contents see page 33)
VOLUME 16 No. 2 FEBRUARY 1980
CONSTRUCTIONAL PROJECTS
DYNAMIC NOISE LIMITER by HA. Penfold 19
Improves cassette recorder performance
SOLDERING IRON CONTROLLER by MS. Dhingra 30
Controls tip temperature
ACCOUSTICALLY COUPLED TELEPHONE MODEM by K. Amor 39
Computer communication system
ELECTROSTAT by P. Dakin 46
An electronic thermostat
4 CHANNEL DIGITAL MEMORY by C. Harding 56
Storage facility for oscilloscopes
GENERAL FEATURES
SEMICONDUCTOR UPDATE byR.W. Coles 29
ZN419CE, 87C48, MCM68732
THE ULA by E.Fry B.Sc. 34
Uncommitted Logic Array
STRICTLY INSTRUMENTAL by K. Lenton-Smith 45
MICROBUS by D.J.D. 53
Micro Magician, Frequency Generator and 8080 Two-Byte Jump
INGENUITY UNLIMITED 60
Tape/Slide Sync, Voltage Sensitive Relay, 'Jacked Up' Regulator, Waveform Convertor for Minisonic, Car Cassette Power Supply, Rhythm Code Generator, Automatic Car Aerial Control, 3-lamp 2-wire Controller, Scope Calibrator
NEWS AND COMMENT
EDITORIAL 15
MARKETPLACE 16
New products
MICRO PROMPT 23
News and ideas on PE designs for micros
INDUSTRY NOTEBOOK by Nexus 24
Inside industry
SPACEWATCH by Frank W. Hyde 27
COUNTDOWN 28
NEWS BRIEFS 28,55
BOOK REVIEWS 36
COMPUTER CASE OFFER 37
PATENTS REVIEW 38
PE/LEKTROKIT COMPETITION RESULTS 38
POINTS ARISING 38
Ultrasonic Cleaner, Ultrasonic Burglar Alarm, Digital Temperature Controller
OUR MARCH ISSUE WILL BE ON SALE FRIDAY, 8 FEBRUARY 1980 (for details of contents see page 33)
VOLUME 16 No. 3 MARCH 1980
CONSTRUCTIONAL PROJECTS
AUDIO ISOLATOR by G. Davies 22
Banish shocks and hum loops
ENLARGER TIMER by R. Besson 33
Photographic process timing control
CAR RADIO 40
A 5 push button set with 6W output
ACOUSTICALLY COUPLED TELEPHONE MODEM by Kenneth Amor 54
Part 2-Construction and applications
A SIMPLE CONVERSATION AID by J. M. Watt MB., Ch.B. 62
Amplifier for the hard of hearing
DIGITAL FREQUENCY METER by Michael Tooley BA. and David Whitfield B.A., M.Sc. 72
10Hz to 5MHz Portable unit
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles 25
8041/ISBC, Super E-line
TRANSISTOR PARAMETERS by R.A. Hatton 29
Common emitter h-parameters discussed
INGENUITY UNLIMITED 58
Wah-wah pedal-200W Temperature controller-Hexadecimal display-Guitar tremolo
COMPUKIT UPDATE by Dr. A. A. Berk 68
Graphics and cassette speed revelations
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
INDUSTRY NOTEBOOK by Nexus 21
Almanac for the '80s
BREADBOARD REVIEW 26
NEWS BRIEFS 30,79
COUNTDOWN 63
PATENTS REVIEW 64
WATCH OFFER 65
SPACEWATCH by Frank W. Hyde 66
MICRO-PROMPT 67
POINTS ARISING 71
READOUT 80
COMPUTER CASE OFFER 81
SPECIAL SUPPLEMENT
P.A. LOUDSPEAKER SYSTEMS by Ben Duncan 44
For Discos and Rock Bands OUR APRIL ISSUE WILL BE ON SALE FRIDAY, 14 MARCH 1980 (for details of contents see page 61)
VOLUME 16 No. 4 APRIL 1980
CONSTRUCTIONAL PROJECTS
CHIP CHECKER by L. V. Cooper 25
Versatile i.c. tester
PRESCALER by Michael Tooley BA. and David Whitfield BA., M.Sc. 34
VHF. accessory for the DFM
PE CONGRESS Part 1 by Graham Jackson 38
Hi-fi stereo amplifier
PE TRAVELLER 70
Part 2-Installation and Suppression
2 WIRE TRAIN CONTROLLER Part 1 by J. Milne 72
Allows independent control over four channels
GENERAL FEATURES
EDUKIT REVIEWED by Mike Abbott 22
A really low cost learning tool
SEMICONDUCTOR UPDATE by R. W. Coles 24
ZMOS F.E.T. AG1000 IU1O1
POWER SUPPLIES FOR M.P.U.s Part 1 by A. Clements 54
Design basics for adequate supplies
MICROBUS by D.J.D. 60
Programming problems-low cost SC/MP system-Hex keyboard/display
INGENUITY UNLIMITED 64
Model Railway Controller-Metal Detector-Low Noise Mic Pre-amp
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
INDUSTRY NOTEBOOK by Nexus 33
MICRO-PROMPT 63
SPACEWATCH by Frank W. Hyde 66
SPEAKER OFFER 68
COUNTDOWN 71
PATENTS REVIEW 79
READOUT 80
BOOK REVIEWS 80
POINTS ARISING 80
SPECIAL SUPPLEMENT
VIDEO FOR EVERYONE by G. K. Gardner 44
State of the art and the future
OUR MAY ISSUE WILL BE ON SALE FRIDAY, 11 APRIL 1980 (for details of contents see page 37)
VOLUME 16 No. 5 MAY 1980
CONSTRUCTIONAL PROJECTS
PE CONGRESS Part 2 by Graham Jackson 26
Pre-amp circuit description and construction
SPLIT PHASE TREMOLO byJ. McCarthy 34
Special effect for musicians
INFRA-RED CONTROLLER by Malcolm Plant 42
Two channel remote control system
DYNAMIC SEMICONDUCTOR TESTER by Michael Tooley BA and David Whitfield BA, MSc 48
For testing diodes, bipolars and f.e.t.s
2 WIRE TRAIN CONTROLLER by J. Milne 66
Part 2-Final assemblies and setting up
GENERAL FEATURES
POWER SUPPLIES FOR M.P.U.s Part 2 by A. Clements 22
A practical design
SUREFIRE ELECTRONIC IGNITION REVIEW 33
New ignitions for old
ANIMATED GRAPHICS by P. Houghton 40
Games programming for the UK101
INGENUITY UNLIMITED 58
Rhythm Generator for Minisonic-Car Battery Charge Indicator-TTL Staircase GeneratorSimple D.C. Power Controller-Current/Voltage Regulator-Appointment Reminder-Four State Indicator-Car Courtesy Light Timer
STRICTLY INSTRUMENTAL by K. Lenton-Smith 65
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
INDUSTRY NOTEBOOK by Nexus 21
SPACEWATCH by Frank W. Hyde 25
NEWS BRIEFS 37, 41,46
MICRO-PROMPT 38
HOW TO USE YOUR FREE STICKIES 47
PATENTS REVIEW 53
EDUKIT OFFER 63
COUNTDOWN 73
READOUT 74
OUR JUNE ISSUE WILL BE ON SALE FRIDAY, 9 MAY. 1980 (for details of contents see page 55)
VOLUME 16 No. 6 JUNE 1980
CONSTRUCTIONAL PROJECTS
PE CONGRESS Part 3 by Graham Jackson 26
Final construction and testing
BENCH PSU by J. P. MacCaulay 34
Variable voltage and current limit
MASTERTUNE by B.J. HamilI 39
A useful tuning aid for guitarists
GREENHOUSE TEMPERATURE CONTROLLER by P. R. Williams 58
Energy saving control unit
DIGITAL TACHOMETER by G. t Williams 64
A general purpose workshop r.p.m. meter
GENERAL FEATURES
WERSI AND CLEF SOUND PROCESSOR KITS REVIEWED 24
Adding the effect of rotating speakers electronically
SEMICONDUCTOR UPDATE by R. W. Coles 32
MPD 7801 HEDS-1000 XRL556 BT155
COLOUR BLINDNESS by Dr. Janet Voke 48
Types, testing and recommendations
INGENUITY UNLIMITED 52
Motor Reversal-555/556 Quick Tester-Lamp Flasher-Stereo Balance Meter-Op Amp Battery Supply-Model Railway Signal Controller-Frequency Tester/Missing Pulse Detector
MICROBUS by D.J.D. 68
Digital Capacitance Meter-Minefield Game-Z80 Routine-Solutions to Problems
COMPUKIT UPDATE by Dr. A. A. Berk 71
Know your Hex Code
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
New Products
INDUSTRY NOTEBOOK by Nexus 23
What's happening inside industry
EDUKIT OFFER 31
NEWS BRIEFS 36
SPACEWATCH by Frank W. Hyde 45
The Students Satellite, Hipparcos, Japan's Loss, Soviet Activity
READOUT 46
Our Readers air their views
COUNTDOWN 47
BOOK REVIEWS 47
PATENTS REVIEW 62
POINTS ARISING 67
6 Channel Mixer
VOLUME 16 No. 7 JULY1980
CONSTRUCTIONAL PROJECTS
TAPE/SLIDE SYNCHRONISER by R. A. Penfold 34
Automatic System for audio/visual shows
PE DMM by Martin Kent 42 3
4- digit multimeter with a professional performance at low cost
PE DFM by D. Mottram 50
Pocket-sized l.c.d. meter and prescaler
SECURITY SENTRY by William Dickinson 64
Comprehensive protection against unauthorised entry and theft
GENERAL FEATURES
SINCLAIR ZX8O REVIEW by Mike Abbott 22
To have and to hold-first impressions
SEMICONDUCTOR UPDATE 27
CL 7660 TDA1099SP LS7220
VIDEO-THE SLOW REVOLUTION by R, Miles 28
The evolution of the video cassette recorder
SPARKRITE REVIEW 39
Clip on ignition kit
VIDEO INFORMATION 49
JVC open the first Video Information Centre
INGENUITY UNLIMITED 58
Moving Lights Noise Gate-Model Traffic Lights-Accurate Kitchen Timer-TTL/CMOS Debounced Switch-Stepset Sequencer
MICRO PROMPT 88
A bumper bundle of original software
NEWS & COMMENT
EDITORIAL 17
MARKET PLACE 18
New Products
INDUSTRY NOTEBOOK by Nexus 21
What's happening inside Industry
POINTS ARISING 25
WATCH OFFER 33
Casio at discount
COUNTDOWN 37
SPACEWATCH by Frank W. Hyde 40
READOUT 63
Readers views
PATENTS REVIEW 73
OUR AUGUST ISSUE WILL BE ON SALE SATURDAY, 26 JULY 1980 (for details of contents see page 41)
VOLUME 16 No. 8 AUGUST 1980
CONSTRUCTIONAL PROJECTS
DOORBELL MONITOR by J. A. Barrow 30
Logs calls and lights up for callers
PE TELETEXT Part 1 by David Shortland 38
Introduction, transmitter and receiver circuits
PE MAGNUM METAL LOCATOR Part 1 by Andy Flind 51
Supersensitive detector that puts practicality into divination
CONSTANT CURRENT SOURCES by I. Millar 60
Equipment for Electrochemistry
GENERAL FEATURES
ACORN REVIEW by Dr A.A. Berk 22
System 3
STRICTLY INSTRUMENTAL by K. Lenton-Smith 26
Matching the speaker signal from your organ to an external amplifier
SEMICONDUCTOR UPDATE by R. W. Coles 33
7910 UAA1003 MN9106
ELECTROCHEMISTRY by A. T. Kuhn MA DPhil 35
A molecular marvel
MICROBUS by D.J.D. 46
Morse-code Generator-Bulls and Cows for ZXSO-inverted Characters on VDU-Digital Alarm Clock
INGENUITY UNLIMITED 66
Hex Keypad-Multiplexer-Keyboard Scanner-Inexpensive A-to-D Converter-Portable Tennis
NEWS & COMMENT
EDITORIAL 17
MARKETPLACE 18
New products
INDUSTRY NOTEBOOK by Nexus 21
What's happening inside industry
CAPACITOR OFFER 45
A bargain not to be missed
SPACEWATCH by Frank W. Hyde 49
Solar Energy and the Satellite Power System
PATENTS REVIEW 59
READOUT 70
OUR SEPTEMBER ISSUE WILL BE ON SALE SATURDAY, 16 AUGUST 1980 (for details of contents see page 29)
VOLUME 16 No. 9 SEPTEMBER 1980
CONSTRUCTIONAL PROJECTS
DISCO DESK Part 1 by Ben J. Duncan 24
A mobile control console for high power, hf. sound systems
PROGRAMMABLE SOUND GENERATOR by D. Coutts 32
An almost unlimited range of sound effects for your Compukit
PE TELETEXT Part 2 by David Shortland 42
Tuner and Decoder circuits
PE MAGNUM Part 2 by Andy Flind 52
Final construction and setting up
CLASS "A" AMPLIFIER by K. Garwell 58
5OW Stereo Design
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles 20
NSC 800 74LS610 MA 537
UK 101 TELEPRINTER INTERFACE by J.J. Trevillion 38
A simple alternative to an on-line printer
MICRO PROMPT 40
Another batch of original ideas
INGENUITY UNLIMITED 66
Alarm Clock Weekend Lockout-Four Digit to Six Digit Clocks-Quiz Win Indicator-Function Generator-Slave Flash Controller-Battery Check
NEWS & COMMENT EDITORIAL 17
MARKETPLACE 18
New Products
COUNTDOWN 21
POINTS ARISING 21
Digital Tachometer-Compukit Update-PE DMM-Micro Prompt-Constant Current Sources INDUSTRY NOTEBOOK by Nexus 23
Keeping up to date on the Electronics Industry
PATENTS REVIEW 51
New ideas from around the world
SPECIAL OFFER-AUTORANGTNG DMMS 57
NEWS BRIEFS 62
SPACEWATCH by Frank W. Hyde 64
News from Russia, and more details of the Satellite Power System
CASIO WATCH OFFER CORRECTION 65
OUR OCTOBER ISSUE WILL BE ON SALE FRIDAY, 12 SEPTEMBER 1980 (for details of contents see page 63)
VOLUME 16 No. 10 OCTOBER 1980
CONSTRUCTIONAL PROJECTS
CINE FRAME COUNTER by Stephen Ibbs 30
Battery Powered Unit with 7-segment display
LEAD TESTER by Chris Lane 36
Provides rigorous analyses of signal lead
125W AMPLIFIER 52
High power mono design
PE TELETEXT Part 3 by David Shortland 56
Video Summer Board and P.S.U.
DISCO DESK Part 2 by Ben J. Duncan 62
Card 2 and more circuits
GENERAL FEATURES
MICROBUS by D.J.D. 24
Acorn teletext VDU-Nine problems revisited
SEMICONDUCTOR UPDATE by R. W. Coles 29
LM187I LM1872 HM6564 T0237 TDAIOS5A
INGENUITY UNLIMITED 40
Roulette Wheel-Car Anti-Theft Device-Shoot Game
THE SHAPE OF SPACECRAFT by C. R. Francis B.Sc., Ph.D. 44
Technical details behind the weird shapes
NEWS & COMMENT EDITORIAL 19
MARKETPLACE 20
New Products
INDUSTRY NOTEBOOK by Nexus 23
What's happening inside industry
SPACEWATCH by Frank W. Hyde 32
Leasat, Landsat 2, Comet Chaser Giotto, and the Solar Maximum Mission
TURNTABLE OFFER 35
For Disco and general audio applications
NEWS BRIEFS 55,68
PATENTS REVIEW 67
H-Fi Filming
POINTS ARISING 67
Micro Prompt
COUNTDOWN 68
BOOK REVIEW 68
The Personal Computer Book
OUR NOVEMBER ISSUE WILL BE ON SALE FRIDAY, 10 OCTOBER 1980 (for details of contents see page 43)
VOLUME 16 No. 11 NOVEMBER 1980
CONSTRUCTIONAL PROJECTS
GAMES TIMER by Stephen Ibbs 23
With booby' delay for added suspense
SECURITY SENTINEL Part 1 by W. C. Dickinson 32
Control Unit for a complete home security system
PE TELETEXT Part 4 by David Shortland 48
Wiring and Testing-conclusion of series
PE DIAMATIC UPDATE by J. R. W. Ames and W. L. Blyth 52
Overcoming two common problems
DISCO DECK Part 3 by Ben J. Duncan 56
Final Cards
GENERAL FEATURES
SPEECH SYNTHESIS Part 1 by Dr. A. A. Berk 26
Fundamental theory of synthesised speech
SEMICONDUCTOR UPDATE by R. W. Coles 39
HNVM3008 MM58174 TL011
MICROPROMPT 40
Help, and calls for help
RESIDENT EDITOR by N.A. Climpson 43
Put the Editor in Monitor for instant use
INGENUITY UNLIMITED 68
TTL Logic Tester-Light Triggered Variable Pulse-R/C Failsafe and Servo Tester-Logic Probe Op-Amp Tester-Shoot Game
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
New Products
INDUSTRY NOTEBOOK by Nexus 20
Looking on the bright side
SPECIAL OFFER ... PE CONGRESS 31
Save £15 on the Congress Amplifier kit
NEWS BRIEFS 44
SPACEWATCH by Frank W. Hyde 47
False Alarms-The Viking Mission-The Sun
COUNTDOWN 51
POINTS ARISING 51
Micro Prompt-Programmable Sound Generator-PE Magnum
PATENTS REVIEW 55
Ingenious ideas from original thinkers
READOUT 61
A bumper batch of your letters
BOOK REVIEW 62
TURNTABLE OFFER 66
For Disco and general audio applications
OUR DECEMBER ISSUE WILL BE ON SALE FRIDAY. 14 NOVEMBER 1980 (for details of contents see page 65)
VOLUME 16 No. 12 DECEMBER 1980
CONSTRUCTIONAL PROJECTS
PE MICROTUNE Part 1 by Martin Kent 26
A keep fit kit for your car
PE MASTER RHYTHM Part 1 by A. J. Boothman BSc. 32
Programmable Rhythm Generator
2OmA LOOP by Stephen Ibbs 40
Opto-isolated power for the teletype selector magnet
SPEECH SYNTHESIS by Dr. A.A. Berk 44
Speech Board and interface designs
SECURITY SENTINEL Part 2 by W. C. Dickinson 54
Construction and installation
DISCO DESK Part 4 by Ben J. Duncan 60
12V subsystem; output routing and monitor switching
GENERAL FEATURES
SEMICONDUCTOR UPDATE by R. W. Coles 23
IMS1400 EF9365
MICROBUS by D.J.D. 52
Six BASIC programs for the Sinclair ZX80
INGENUITY UNLIMITED 64
Keyboard Switches-A True Peak-reading DC Voltmeter-Simple Pulse Generator
NEWS AND COMMENT
EDITORIAL 17
MARKETPLACE 18
New Products
INDUSTRY NOTEBOOK by Nexus 21
Our man in the know remains optimistic
SPECIAL OFFER: IN CAR ENTERTAINMENT 24
Once again we bring you quality products at unbelievable prices
COUNTDOWN 25
What to see; where and when to see it
SPACE WATCH by Frank W. Hyde 43
The Shuttle Telescope-The Heart of a Supernova-The Solar Wind
READOUT 50
Frank Hyde closes the correspondence on Velikovsky
PATENTS REVIEW 59
Another installment in the chequered history of speaker design
POINTS ARISING 59
NEWS BRIEFS 59
INDEX FOR VOLUME 16 - 66
OUR JANUARY 1981 ISSUE WILL BE ON SALE FRIDAY, 12 DECEMBER 1980 (for details of contents see page 31)
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