January 1988 PE vol. 22 no. 1

CONSTRUCTIONAL PROJECTS

SANTALITE by John Becker 12

A festive firtree flasher interface with variable mod-tech random programming control.

TEACHER TALKBACK by Tim Pike 17

Talking in class is encouraged with this simple intercom, especially if you're studying for GCSE electronics.

CONSIDERATE MOUSETRAP by Terry Pin nell 22

Unmousetakably a tailented answer to the ancient conflict twixt mice and men.

LEGO BUGGY DRIVER by Robert MacFarlane 26

RAM that Hot-Rod - computerise your motorised Lego Buggy and automate your driving ambition.

FLASHY EGG-TIMER by Chris Bowes 28

Don't be hard-boiled-let LEDs flash theflow oftime for culinary perfection, through technoleggy in action.

SPECIAL FEATURES

SEMICONDUCTORS PART THREE by Andrew Armstrong 35

AA helps avoid driver distress with a straightforward discussion about junction devices.

CALENDER SOFTWARE - a perennial gift from your Ed 33

Fortell the future or prove the past with this Basic centurian calender program. Plus PE's 1988-at-a-glance.

RECALLING HISTORY PART TWO by Barry Drake 40

The Crossbar telephone exchange of the 1960s overcame a few dialemmas, but electronic techniques now route the future of telecoms through System-X LCD

COLOUR TV - a consumer feature 44

ELECTRONIC LOCKS by The Prof 49

The Prof picks his way through some of the more exotic locking techniques that offer keysto satisfactory security.

REGULAR FEATURES

EDITORIAL - Weather beaten 9

LEADING EDGE by Barry Fox - D-MAC satellite transmission 8

SPACEWATCH by Dr. Patrick Moore - Supernova problems 46

INDUSTRY NOTEBOOK by Tom Ivall - Electronic centennial 57

MARKETPLACE - what's new, where and when 4

PCB SERVICE - professional PCBs for RE Projects 60

TRACK CENTRE - the PCB track layout pages 32

READERS' LETTERS - and a few answers 38

BAZAAR - Readers' FREE advertising service 45

ADVERTISERS' INDEX 62

NEXT MONTH

WE RING IN THE BRIGHT NEW YEAR WITH -

LOGIC ANALYSING • MOTOR SERVO MIXER • TREMOLON • MORE GCSE IDEAS 'REAL WORLD INTERFACING • SEMICONDUCTORS. AND A HOST OF OTHER FEATURES YOU'LL FIND APPEALING

THE RESOLUTION SOLUTION -

DON'T MISS THE FEBRUARY 1988 ISSUE ON SALE FROM FRIDAY JANUARY 8TH

January - missing

February - missing

March - missing

April 1988 PE vol. 24 no. 4

CONSTRUCTIONAL PROJECTS

LIGHT METAL EFFECTS by Robert Penfold 12

You don't need to be a weightwatching musical heavy to ring modulations from this toned-up music modifying module.

WEATHER CENTRE - PART TWO by John Becker 25

This month Ed helps to keep your feet dry by providing an automatic indoor monitor for the weather detecting circuits.

INGENUITY UNLIMITED by Enthusiastic Readers 30

More novel circuit ideas to keep your brains and hands active a Spectrum Hardware Restart and Rom Select circuit, a High Reliability Pulse Feeder, and a Stereo Grannyphone Interface.

TEACHER COUNTER by Tim Pike 40

Logic plays an eventful part in any digital counting circuit and Boolean gates open up golden opportunies for GCSE students.

SPECIAL FEATURES

SATELLITES - PART TWO by Mike Sanders 19

Revealing how Spade work broadens the signalling scope forsatellites carrying irregular communications, and how Intelsat V benefits from multiple capacity.

BIO-CHROMATIC ELECTRONICS by Lola McMalcolm 34

Interdisciplinary cooperation plays an ever growing role, particularly in the development of cellular memory devices that may represent the route to intelligent computers.

SEMICONDUCTORS - PART FIVE by Andrew Armstrong 48

Armed with a strong desire to share his enthusiasm Andrew looks at what he believes to be the most interesting area of discrete semiconductors - power mosfets.

REGULAR FEATURES

EDITORIAL-Weather watching 9

LEADING EDGE by Barry Fox - Favourite track selection 8

SPACEWATCH by Dr. Patrick Moore - The way to Mars? 46

INDUSTRY NOTEBOOK by Tom Ivall -The twenty-year shake-out. 57

READERS' LETTER - and a few answers 39

PRODUCT FEATURES

MARKETPLACE - what's new, where and when 4

ARMCHAIR BOOKSHOP - books to increase your knowledge 53

BOOKMARK - reviews of newly published books 38

PCB SERVICE -- professional PCBs for PE Projects 60

TRACK CENTRE - the PCB track layout page 32

BAZAAR - Readers' FREE advertising service 58

ADVERTISERS' INDEX 62

NEXT MONTH...

SPRING HAS SPRUNG AND SO HAVE WE TO BRING YOU -

MAINS MODEM. SPEECH PROCESSING. INTELSAT VI AND BEYOND

• DAT - THE REALITIES • MOSFET APPLICATIONS • CONSUMER ELECTRONICS REPORT • AND OTHER TOP LINE FEATURES WILL BLOSSOM FORTH.

DON'T LET THE GRASS GROW UNDER YOUR FEET BY MISSING THE PE MAY 1988 ISSUE ON SALE FROM FRIDAY APRIL 8TH

May - missing

June- missing

July - missing

August 1988 PE vol. 24 no. 8

CONSTRUCTIONAL PROJECTS

SPEAKING CLOCK by Stephen Hunt 12

Friends, readers, constructors, lend us your ears - we speak to thee not idly of the march of phoneme time.

PROXIMITY DETECTION by the Prof 21

Howto detect close encounters of the thermal kind, and tuned and ultrasonic-the Prof reflects on some circuits that he views with alarm.

INGENUITY UNLIMITED by Enthusiastic Readers 32

Featuring a Mouse Simulator for the Amstrad CPC, a Conference Lamp Controller, and a Short Detector.

BATTERY TO MAINS AND HT CONVERTERS - PART TWO by George Kerridge 42

Don't be caught out by power cuts - make the most of yourcar battery and be transformed to a brighter outlook.

SPECIAL FEATURES

AN ANALOGUE A-Z by Chris Kelly 27

A compact dictionary of analogue semiconductor terminology in words and pictures.

CD SIGNAL PROCESSING - PART TWO by Vivian Capel 35

Spotlighting binary frames and coded modulation we filter facts from fiction and find that cd quality has the hump.

I DON'T ALWAYS AGREE by Wayne Green 48

Could educational videos change the world?

SEMICONDUCTORS - PART NINE by Andrew Armstrong 49

Get turned on safely with practical circuits and building blocksthat offer isolation via pulsed thyristors and triacs.

REGULAR FEATURES

EDITORIAL by John Becker - Kicking the bucket 9

LEADING EDGE by Barry Fox - Crystal gazing's colour future 8

SPACEWATCH by Dr. Patrick Moore - Herstmonceux for sale 46

INDUSTRY NOTEBOOK by Tom Ivall - Down to earth electronics. 57

READERS' LETTERS - and a few answers 31

PRODUCT FEATURES

MARKETPLACE - what's new, where and when 4

ARMCHAIR BOOKSHOP - we've recently restocked with new books 54

PCB SERVICE - professional PCBs for PE projects 60

TRACK CENTRE - the PCB track layout page 32

BAZAAR - Readers' FREE advertising service 58

ADVERTISERS' INDEX 58

NEXT MONTH .

WE'VE BEEN PRESSURED TO TAKE A STAR-SPANGLED LOOK AT A COMPUTERISED BAROMETER & ASTRONOMICAL ELECTRONICS

• MUXING-OUT THE BEEB • MICROPROCESSOR DEVELOPMENT

• CD ROM . AND IT'S BACK TO THE CHALK-TALK FOR THE START OF ANOTHER CLASSIC GCSE TUTORIAL SERIES.

MASTER YOUR SCHOLARLY NEWSAGENT AND ORDER YOUR FIRST-CLASS COPY OF OUR SEPTEMBER ISSUE ON SALE FROM FRIDAY AUGUST 5TH

September 1988 PE vol. 24 no. 9

NEW TUTORIAL SERIES

DIGITAL ELECTRONICS - PART ONE by Owen Bishop 12

We start a new season of tutorials and projects suitable forthose taking GCSE electronics courses. Owen Bishop, renowned author of many electronics books and magazine features, headsthis months classthrough the gates to examine basic electronic logic.

CONSTRUCTIONAL PROJECTS

MUXING THE BEEB by Roger Morgan and Karl Stringer 28

Your BBC computercan spread theword far and wide if properly Morganised with a multiple multiplexer.

ELECTRONIC BAROMETER by John Becker 35

Ed's been pressured into measuring bars without keeping his head in the clouds and finds thatthe atmosphere can be serialised.

INGENUITY UNLIMITED by Enthusiastic Readers 42

Another selection of novel ideas that prove that the age of inventiveness has its chips in good order.

SPECIAL FEATURES

CCDS IN ASTRONOMY by Paul Jorden 19

Charge coupled devices brighten the astronomer's view of the universe through their efficiency in registering faint stellar light.

DAT SAGA CONTINUES by Wayne Green 27

Our Americancorrespondant reveals the latest State-side developments in the dat drama.

CD ROM by Vivian Capel 48

Laser accessed pits and lumps areas ideal for computer data storage as they are for sound recording, and have encyclopaedic possibilities.

MICROPROCESSOR SYSTEM DEVELOPMENT by Tim Watson 50

With the right tools and techniques, integrating hardware and software can be greatly simplified for the designer.

REGULAR FEATURES

EDITORIAL by John Becker - Accepting encouragement 9

LEADING EDGE by Barry Fox - Smog's new hazards 8

SPACEWATCH by Dr. Patrick Moore - Perseid pursuit 46

INDUSTRY NOTEBOOK by Tom Ivall - Modem times 57

Z88 COMPETITION - The Winner 45

READERS' LETTERS - and a few answers 61

POINTS ARISING 34

PRODUCT FEATURES

MARKETPLACE - what's new, where and when 4

ARMCHAIR BOOKSHOP - Have you browsed our new book list?. 54

BOOKMARK - reviews of newly published books 32

PCB SERVICE - professional PCBs for PE projects 60

TRACK CENTRE - the PCB track layout page 33

BAZAAR - Readers' FREE advertising service 58

ADVERTISERS' INDEX 62

NEXT MONTH...

WE SPAN THE DEPTHS AND THE HEIGHTS WITH SUBMARINE CABLES • INFRARED ASTRONOMY • MAKING A METAL DETECTOR • A UNIVERSAL OUTPUT PORT. AND THERE'S MORE OF THE NEW DIGITAL ELECTRONICS TUTORIAL.

YOU WON'T MISS THE BOAT IF YOU ORDER YOUR COPY OF OUR OCTOBER ISSUE ON SALE FROM FRIDAY SEPTEMBER 2ND

October 1988 PE vol. 24 no. 10

CONSTRUCTIONAL PROJECTS

PHASER METAL DETECTOR by the Prof 12

Seek it here,then seek it there-PE's detectorwill phase to treasure almost anywhere. ELECTRONIC BAROMETER - PART TWO by John Becker 24

Setting out how setting up can screen the millibars and display degrees without being graduated.

DIGITAL ELECTRONICS - PART TWO by Owen Bishop 35

Owen takes his OR in AND paddles up the data stream to show how gates are locked and how a probe canfind the XOR for GCSE students.

SPECIAL FEATURES

SUBMARINE CABLES by Mike Sanders 19

Despite the advent of satellites, submarine cables remain vital to communications across lakes, seas and oceans.

MICROPROCESSOR SYSTEM DEVELOPMENT - PART TWO by Tim Watson 27

Eproms offer the home constructor an inexpensive method of emulating microprocessor systems.

SEMICONDUCTORS - PART TEN by Andrew Armstrong 42

Logic rules ok, butonly if the design techniques conform to standard development principles.

INFRA-RED ASTRONOMY WITH ARRAYS by John Davies 49

Across the cold expanses of the universe even the faint heat of darkened stellar dust reveals secrets to infra-red detectors.

REGULAR FEATURES EDITORIAL by John Becker - Safely does it 9

LEADING EDGE by Barry Fox - Satellite battles 8

SPACEWATCH by Dr. Patrick Moore - the Phobos probes 46

INDUSTRY NOTEBOOK by Tom Ivall - Should engineers care? 57

READERS' LETTERS - and a few answers 56

PRODUCT FEATURES

MARKETPLACE - what's new, where and when 4

ARMCHAIR BOOKSHOP- Have you browsed our new book list?. 54

BOOKMARK - reviews of newly published books 60

PCB SERVICE - professional PCBs for PE projects 61

TRACK CENTRE - the PCB track layout page 52

BAZAAR - Readers' FREE advertising service 53

ADVERTISERS' INDEX 62

POINTS ARISING 47

NEXT MONTH

BY POPULAR REQUEST WE'RE PLEASED TO BRING YOU -

* A DUAL-BEAM OSCILLOSCOPE * SURFACE MOUNTING TECHNOLOGY* PLD PROGRAMMER *AND A GREAT DEAL MORE

REQUEST YOUR POPULAR NEWSAGENT TO RESERVE YOUR COPY OF OUR NOVEMBER 1988 ISSUE ON SALE FROM FRIDAY OCTOBER 7th

November 1988 vol. 24 no. 11

CONSTRUCTIONAL PROJECTS

DUAL BEAM OSCILLOSCOPE by John Becker 12

Tracing the route to getting the tube home and facing up to electronics with a doubly beaming smile.

DIGITAL ELECTRONICS -PART THREE by Owen Bishop 35

Multivibrators don't need springs or motors if you know how to logically open and close the astable gate before the force has gone.

PLD PROGRAMMER by Chris Kelly & Steve Pattinson 49

Programming your own logic devices minimises design time and board space - building your own programmer saves pounds by the hundred.

SPECIAL FEATURES

SUBMARINE CABLES - PART TWO by Mike Sanders 19

Tats and Cantats, Anzcan and Se-Me-We, names to conjure with when Seadogs trench the oceans for coaxing optical telecoms.

SMT AND DIY by Fred Thorns 27

Join the growing band of diy initiates on the wings of a gull and learn about handling surface mounted component maintenance.

SEMICONDUCTORS-PART ELEVEN by Andrew Armstrong 42

CM OS 4000 completes the circuits that other chips cannot reach.

REGULAR FEATURES

EDITORIAL by John Becker - dominating Britain 9

LEADING EDGE by Barry Fox - operational war games 8

SPACEWATCH by Dr. Patrick Moore - supernova light echoes 46

INDUSTRY NOTEBOOK by Tom Ivall - the listening machine 57

READERS' LETTERS - and a few answers 30

PRODUCT FEATURES

MARKETPLACE - what's new, where and when 4

ARMCHAIR BOOKSHOP- have you browsed our good book list? 54

PCB SERVICE - professional PCBs for PE projects 60

TRACK CENTRE - the PCB track layout page 61

BAZAAR - Readers' FREE advertising service 53

ADVERTISERS' INDEX 62

NEXT MONTH

WE'VE LAYED DOWN THE RIGHT TRACK MIX FOR -

A TEN-INPUT PANNING MIXER * RAILWAY SIGNALLING ELECTRONICS * DIGITAL MULTIMETERS * PLUS LOTS MORE IN OUR SERIALISED FEATURES * AND THERE'S A FREE CMOS 4000 SERIES DATA CARD!

DON'T MISS YOUR PIN-OUT PIN-UP IN OUR DECEMBER ISSUE ON SALE FROM FRIDAY NOVEMBER 4th

December 1988 vol. 24 no. 12

CONSTRUCTIONAL PROJECTS

PANNING MIXER by Robert Penfold 12

Electronic music enthusiasts - discover how evenly ten will go into two and how lines can be crossed without losing your balance.

DUAL BEAM OSCILLOSCOPE - PART TWO by John Becker 25

Sync among the waves and let a sweep in time increase your X-pertise in screening potential success.

DIGITAL ELECTRONICS - PART FOUR by Owen Bishop 35

Explore the logic of systems design and learn how gates can be counted on for efficient flexibility, with or without the help of Mickey Mouse.

PLD PROGRAMMER -PART TWO by Chris Kelly & Steve Pattinson 51

Concluding the fuse-blower's guide to programmed design sophistication.

SPECIAL FEATURES

ADVANCED TELETEXT RECEIVER by Andrew Armstrong 30

Aunty Beeb's computer has its new Ceefax and Oracle interface reviewed by Uncle Andrew.

SEMICONDUCTORS - PART TWELVE by Andrew Armstrong 19

Despite the flexibility of cmos, ttl has its advantages, as does ecl if you learn its black art.

SUBMARINE CABLES - PART THREE by Mike Sanders 48

Monarchs and unmanned submersibles keep marine cables well maintained for the future of increasingly diverse communications traffic.

REGULAR FEATURES

EDITORIAL by John Becker - pin-out pin-ups 9

LEADING EDGE by Barry Fox - netting Cellnet 8

SPACEWATCH by Dr Patrick Moore - dinosaur doomwatch 46

INDUSTRY NOTEBOOK hy Tom Ivall - of discs and digits 57

READERS' LETTERS - and a few answers 44

ANNUAL INDEX -January to December 1988 60

PRODUCT FEATURES

MARKETPLACE-what's new, where and when 4

ARMCHAIR BOOKSHOP - have you browsed our good book list? 54

PCB SERVICE - professional PCBs for FE projects 42

TRACK CENTRE - the PCB track layout page 43

BAZAAR - Readers' FREE advertising service 56

ADVERTISERS' INDEX 62

NEXT MONTH

WE'VE SCINTILLATING FEATURESTO SPARKLE-UPTHE FESTIVITIES

* A SHERLOCK HOLMES MACHINE * A CHOICE OF SEASONAL SPANGLERS * RAILWAY ELECTRONIC SIGNALLING (sorry the postal strike didn't allow it this month - or the Digital Multimeters feature, which is being rescheduled) * AND OF COURSE WE'VE OUR REGULAR GIFTED AUTHORS WITH THEIR TOPICAL NEWS, VIEWS AND FEATURES.

ADD OUR JANUARY 1989 ISSUE TO YOUR LIST OF LONGED-FOR PRESENTS ON SALE FROM FRIDAY DECEMBER 2ND

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