JANUARY 1972
         PHOTO-PRINT PROCESS CONTROL UNIT 22
LIE DETECTOR 33
I.C. AUDIO MIXER 43
LOGICAL RADIO CONTROL 48
RADIO ASTRONOMY TECHNIQUES-8 63
METALS IN ELECTRONIC ENGINEERING 28
INGENUITY UNLIMITED 54
STABILISED SUPPLY WITH OVERLOAD PROTECTION
RESETTABLE COUNTER
AUDIO FAIR 56
NEWS BRIEFS
PATENTS REVIEW 61
IMPROVING AMPLIFIER PEFORMANCE
SYNTHETIC ANIMAL SOUNDS
ON THE FRINGE 71
OLFACTRONICS
COOL GLOW DISCHARGE
JABBER-JAMMER OSCILLATOR
         
         FEBRUARY 1972
         IGNITION BOOSTER I 10
MODEL SERVO CONTROL 128
OSCILLOSCOPE BEAM SPLITTER 139
PHOTO-PRINT PROCESS CONTROL UNIT 146
RADIO ASTRONOMY TECHNIQUES - 9 134
FIBRE OPTICS 116
TAPE NOISE LIMITER 158
POINTS ARISING 120
LIE DETECTOR
I.C. DIGITAL DICE
PATENTS REVIEW 127
SLEEP DRIVING ALARM
ROTARY AUTO-TRANSFORMER CONTACTS
ELECTRONORAMA 132
POST OFFICE SPEAKING CLOCKS
         
         MARCH 1972
         TREMOLO UNIT 206
PHOTOCELL THYRISTOR SWITCH 208
GENERAL PURPOSE AMPLIFIER 214
PICKUPS AND TURNTABLES 220
MODEL SERVO CONTROL 230
ALPHA-NUMERIC DISPLAYS- 1 200
RADIO ASTRONOMY TECHNIQUES- 10 221
INGENUITY UNLIMITED 228
UNIJUNCTION TIMER
RF AMPLIFIER FOR CAR RADIO
THE UNIJUNCTION TRANSISTOR 238
SPACEWATCH
POINTS ARISING 218
I.C. DIGITAL DICE
P.E. SCORPIO IGNITION SYSTEM
PHOTOPRINT PROCESS CONTROL
PATENTS REVIEW 229
TONE GENERATORS
NEUTRALISED AMPLIFIERS
ON THE FRINGE 237
ELECTROPSYCHEDELIA? BIOFEEDBACK
FAST TALKER FOR THE BLIND
         
         APRIL 1972
         DOUBLE FLUORESCENT LAMP INVERTER 286
P.E. GEMINI STEREO TUNER-1 303
WIDEBAND SIGNAL INJECTOR 314
TREBLE BOOSTER 320
ALPHA-NUMERIC DISPLAYS-2 292
INGENUITY UNLIMITED 296
SCS COUNTING CIRCUITS 322
ELECTRONORAMA 312
MICROWAVE PROPAGATION STUDY
PATENTS REVIEW 318
PRESSURE TRANSDUCER ALARMS
COMPANDER FOR DISC RECORDING
POINTS ARISING 330
LOGICAL RADIO CONTROL
IC AUDIO MIXER
         
         MAY 1972
         ULTRASONIC TRANSMITTER-RECEIVER 374
SOLID STATE SNAP 392
FUZZ BOX 396
P.E. GEMINI STEREO TUNER-2 400
ALPHA-NUMERIC DISPLAYS - 3 383
SMALL POWER TRANSFORMERS 404
INGENUITY UNLIMITED 417
IC DICE
ON THE FRINGE 391
OCCULTAPHONICS WHITE NOISE
STUDENT IC ADAPTIVE-LOGIC
GREEN FINGERS BIOPOTENTIALS
PATENTS REVIEW 418
ELECTRICAL DAMP COURSE
LOUDSPEAKER DESIGN
         
         JUNE 1972
         VERSATILE LIGHT EFFECTS UNIT 464
P.E. GEMINI STEREO TUNER-3 483
TWO-TWENTY MINUTE TIMER 494
CHARGER POWER UNIT 9V 510
ALPHA-NUMERIC DISPLAYS - 4 471
STEREO RECEPTION 477
INGENUITY UNLIMITED 501
RADIO ALARM FOR DIGITAL CLOCK
PHOTOMETER FOR ECOLOGICAL STUDIES
SONEX '72 HI-FI TECHNIQUES 490
PATENTS REVIEW 498
THUNDERSTORM WARNING
POINTS ARISING 502
SEMICONDUCTOR LEADOUT IDENTICHART
TAPE SPEED CONTROL
P.E. SCORPIO IGNITION SYSTEM
REPORT FROM AUSTRALIA 506
         
         JULY 1972
         P.E. DIGI-CAL-1 548
MINI MOTOR POWER BOOSTER 556
MORE ON LOGICAL RADIO CONTROL 568
CALLERCORD DOOR MONITOR 579
TRANSELECTOR TRANSISTOR TESTER 589
ALPHA NUMERIC DISPLAYS-5 571
DIGITAL ORGAN SYSTEMS 559
INGENUITY UNLIMITED 564
LOGIC PROBE
BATTERY CHARGER PROTECTION
ON THE FRINGE 578
ART IN A WORD GENERATOR
PICTURE IF YOU WILL IMAGE STORAGE
OCCULTAPHONICS CIRCUIT CORRECTION
PATENTS REVIEW 586
IMPROVING POWER SUPPLIES
NEON NOVELTY
POINTS ARISING 594
VERSATILE LIGHT EFFECTS UNIT
CHARGER POWER UNIT
         
         AUGUST 1972
         CAMERA SHUTTER TESTER 640
I.C OSCILLOSCOPE PRE-AMPLIFIER 654
P.E. DIGI-CAL-2 660
CALLERCORD 685
ALPHA-NUMERIC DISPLAYS-6 671
INGENUITY UNLIMITED 681
QUIZZ INDICATOR
BATTERY HOLDER
I.E.A. EXHIBITION 646
SPACEWATCH 650
APOLLO-17
STRICTLY INSTRUMENTAL 653
PATENTS REVIEW 682
FAST CYCLE CHARGER
ANTI-FERROELECTRIC REGULATION
         
         SEPTEMBER 1972
         SQUARE WAVE GENERATOR 728
P.E. ELECTRUNIC PIANO 733
LOGIC DEMONSTRATOR 750
P.E. DIGI-CAL-3 757
ALPHA-NUMERIC DISPLAYS-7 770
PLASTIC PLANAR TRANSISTORS 741
SPACEWATCH 732
TD-1 UV OBSERVATORY
SPACE SHUTTLE
MARS-3 RUSSIAN SPACECRAFT
POINTS ARISING 753
CHARGER-POWER UNIT
CALLERCORD
P.E. GEMINI TUNER
ELECTRONORAMA 754
MOTOROLA PAGER
ON THE FRINGE 756
PSYCHO BLUES - NOISE
PSITRONICS
INDUSTRY NOTEBOOK 766
LASER COMMUNICATIONS
PATENTS REVIEW 769
CONNECTING UP SLAVE BATTERIES
FIBRE OPTIC IGNITIONS
         
         OCTOBER 1972
         I.C. INTERCOM 818
NOUGHTS AND CROSSES GAME 832
P.E. ELECTRONIC PIANO-2 840
P.E. DIGI-CAL-4 848
DESIGNING WITH I.C.s 829
INGENUITY UNLIMITED 825
TTL EQUIVALENCE GATE
VARIABLE ATTACK AND DECAY
COMBINATION LOCK
SPACEWATCH 824
POINTS ARISING 855
SQUARE WAVE GENERATOR
REPORT FROM AUSTRALIA 856
INDUSTRY NOTEBOOK 858
TXE2 TELEPHONE EXCHANGES
GOONHILLY
PATENTS REVIEW 861
MOVEMENT DETECTOR
ELECTRONIC SPEEDOMETER
OPTICAL FIBRE
I.C. LEAD-OUT IDENTICHART INCLUDED
         
         NOVEMBER 1972
         A.F. SIGNAL GENERATOR 918 
P.E. ELECTRONIC PIANO-3 924 
SIMPLE C-R BRIDGE 934 
P.E. DIGI-CAL-5 940
DESIGNING WITH I.C.s-2 961
INGENUITY UNLIMITED 953
Single shot for oscilloscopes
Sensitive light switch
EDITORIAL 917 
POINTS ARISING 922 
SPACEWATCH 923 
P.E. AT THE AUDIO FAIR 933 
INDUSTRY NOTEBOOK 938 
NEWS BRIEFS 948 
PATENTS REVIEW 949 
ON THE FRINGE 950 
READOUT 954
SPECIAL SUPPLEMENT
ELECTRONIC MUSICAL INSTRUMENTS 936-937
         
         
         DECEMBER 1972
         RALLY DRIVER GAME 1018
HOOTING OWL 1032
P.E. ELECTRONIC PlANO-4 1038
P.E. DIGI-CAL-6 1050
SUBSTITUTES FOR VARACTOR DIODES 1046
INGENUITY UNLIMITED 1058
PROJECTOR SPEED READOUT
LIGHT CONTROL 1061
MODEL TRAIN CONTROL 1062
SPACEWATCH 1025
STRICTLY INSTRUMENTAL 1026
PATENTS REVIEW 1045
CHECKING ENGINE IGNITION
WHEEL SPIN CORRECTION
ELECTRONORAMA 1048
AIDS TO MOTORING SAFETY

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