Practical Electronics SDIY articles index (view source)
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! Month!!Year!!Article name!!Author!!PPNo!!Classification
|-
| Nov||1964||Electronic Didjeridoo||A. J. Bassett||39||Effect
|-
| Jan||1965||Electronic Guitar||S. Chisholm||217||Guitar
|-
| Sep||1965||Echo Unit||A. T. J. Carrington||769||Effect
|-
| Feb||1966||Electronic Vibrato Unit||G. Wareham||91||Effect
|-
| Dec||1966||The Electronic Organ||Alan Douglas||848||Organ
|-
| Jan||1967||The Electronic Organ||Alan Douglas||31||Organ
|-
| Feb||1967||The Electronic Organ||Alan Douglas||99||Organ
|-
| Mar||1967||The Electronic Organ||Alan Douglas||200||Organ
|-
| Apr||1967||The Electronic Organ||Alan Douglas||271||Organ
|-
| May||1967||The Electronic Organ||Alan Douglas||349||Organ
|-
| May||1967||Bass Guitar||S. Simpson||359||Guitar
|-
| Jun||1967||The Electronic Organ||Alan Douglas||439||Organ
|-
| Oct||1967||Electronic Music Techniques||Not given||720||Synth
|-
| Nov||1967||Electronic Music Techniques||Not given||845||Synth
|-
| Dec||1967||Spring Line Reverberation Unit||A. J. Bassett||880||Effect
|-
| Jan||1968||White Noise Generator||A. J. Bassett||44||Effect
|-
| Jan||1968||Sine to Square Wave
|-
| Feb ||1968||PE Glissandovibe||R. Bebbington||94||Instrument
|-
| Mar||1968||Rhythmic Sound Effects Unit||A. J. Bassett||168||Drums
|-
| Apr||1968||Sound Effects Unit||A. J. Bassett||267||Effect
|-
| May||1968||Electronic Cymbals||A. J. Bassett||342||Drums
|-
| Jun||1968||Drummer's Whoosh||A. J. Bassett||443||Drums
|-
| Jul||1968||Waa-Waa Pedal||B. H. Baily||470||Effect
|-
| Nov||1968||Rhythm Generator||P. R. Allcock||792||Drums
|-
| Dec||1968||Rhythm Generator||P. R. Allcock||861||Drums
|-
| Feb||1969||The Harmonaphone||M. P. R. Hamer||107||Effect
|-
| May||1969||PE Organ||Alan Douglas||356||Organ
|-
| Jun||1969||PE Organ||Alan Douglas||440||Organ
|-
| Jun||1969||Ingenuity Unlimited: Bass-Maker||P. E. Clancy||466||Effect
|-
| Jul||1969||PE Organ||Alan Douglas||508||Organ
|-
| Jul||1969||Ingenuity Unlimited: Simple Guitar Treble Booster||S. J. Price||505||Effect
|-
| Jul||1969||Ingenuity Unlimited: Variable Waa-Waa||M. P. R. Hamer||505||Effect
|-
| Aug||1969||PE Organ||Alan Douglas||596||Organ
|-
| Aug||1969||Spring Line Reverberation Unit||F. C. Judd||566||Effect
|-
| Sep||1969||PE Organ||Alan Douglas||641||Organ
|-
| Oct||1969||PE Organ||Alan Douglas||746||Organ
|-
| Nov||1969||PE Organ||Alan Douglas||830||Organ
|-
| Dec||1969||PE Organ||Alan Douglas||932||Organ
|-
| Jan||1970||PE Organ||Alan Douglas||52||Organ
|-
| Feb||1970||PE Organ||Alan Douglas||134||Organ
|-
| Mar||1970||PE Organ||Alan Douglas||203||Organ
|-
| Jul||1970||Waa Waa Unit||D. C. Hamill||568||Effect
|-
| Dec||1970||Fuzz Circuit||S. Sharpes||1002||Effect
|-
| May||1971||Tremulant Systems||F. C Judd||372||Effect
|-
| Jun||1971||Tremulant Systems||F. C Judd||477||Effect
|-
| Oct||1971||Electronic Music Synthesis||A. Douglas||802||Information
|-
| Nov||1971||Rhythmetron||F. C. Judd||890||Drums
|-
| Mar||1972||Tremolo Unit||A. Russell||206||Effect
|-
| Apr||1972||Treble Booster||A. Russell||320||Effect
|-
| May||1972||Fuzz Box||A. Russell||396||Effect
|-
| Jul||1972||Digital Electronic Organ Systems||Alan Douglas||559||Organ
|-
| Sep||1972||P.E. Electronic Piano||A. J. Boothman||733||Piano
|-
| Oct||1972||P.E. Electronic Piano||A. J. Boothman||840||Piano
|-
| Nov||1972||P.E. Electronic Piano||A. J. Boothman||924||Piano
|-
| Dec||1972||P.E. Electronic Piano||A. J. Boothman||1038||Piano
|-
| Jan||1973||P.E. Electronic Piano||A. J. Boothman||44||Piano
|-
| Feb||1973||P.E. Sound Synthesiser||G. D. Shaw||140||Synth
|-
| Mar||1973||P.E. Sound Synthesiser||G. D. Shaw||232||Synth
|-
| Apr||1973||P.E. Sound Synthesiser||G. D. Shaw||306||Synth
|-
| May||1973||P.E. Sound Synthesiser||G. D. Shaw||420||Synth
|-
| Jun||1973||P.E. Sound Synthesiser||G. D. Shaw||506||Synth
|-
| Jul||1973||P.E. Sound Synthesiser||G. D. Shaw||596||Synth
|-
| Aug||1973||Audio Compressor||R. A. Penfold||669||Audio
|-
| Aug||1973||P.E. Sound Synthesiser||G. D. Shaw||678||Synth
|-
| Sep||1973||Phasing Unit||D. Benfield||772||Effect
|-
| Sep||1973||P.E. Sound Synthesiser||G. D. Shaw||775||Synth
|-
| Oct||1973||P.E. Sound Synthesiser||G. D. Shaw||882||Synth
|-
| Nov||1973||P.E. Sound Synthesiser||G. D. Shaw||964||Synth
|-
| Dec||1973||P.E. Sound Synthesiser||G. D. Shaw||1082||Synth
|-
| Jan||1974||P.E. Sound Synthesiser||G. D. Shaw||50||Synth
|-
| Feb||1974||P.E. Sound Synthesiser||G. D. Shaw||151||Synth
|-
| Mar||1974||Rhythym Generator||Brice Ward||228||Drums
|-
| Apr||1974||Rhythym Generator||Brice Ward||335||Drums
|-
| May||1974||Sound Bender||D. Bollen||412||Effect
|-
| Jun||1974||Ingenuity Unlimited: Voltage Controlled Selective Amplifier||N. Campbell||438||Synth
|-
| Jul||1974||Ingenuity Unlimited: Patchboards For Synthesisers||J. A. Knife||603||Synth
|-
| Oct||1974||Voltage Controlled Filter||R. Gwinn||884||Synth
|-
| Oct||1974||Ingenuity Unlimited: Phasing Control||R. J. Goodwin||877||Effect
|-
| Nov||1974||P. E. Minisonic||G. D. Shaw||952||Synth
|-
| Nov||1974||Ingenuity Unlimited: Voltage Controlled Oscillator||J. S. Broadhurst||964||Synth
|-
| Dec||1974||P. E. Minisonic||G. D. Shaw||1066||Synth
|-
| Jan||1975||P. E. Minisonic||G. D. Shaw||58||Synth
|-
| Feb||1975||P. E. Minisonic||G. D. Shaw||140||Synth
|-
| Feb||1975||Ingenuity Unlimited: Voltage Controlled Amplifier||P. D. Maddison||162||Synth
|-
| Mar||1975||P. E. Minisonic||G. D. Shaw||212||Synth
|-
| May||1975||P. E. Joanna||A. J. Boothman||384||Piano
|-
| Jun||1975||P. E. Joanna||A. J. Boothman||474||Piano
|-
| Jun||1975||Symbiosis - A composition for the P. E. Minisonic||M. Pointon||488||Synth
|-
| Jul||1975||P. E. Joanna||A. J. Boothman||572||Piano
|-
| Jul||1975||Symbiosis - A composition for the P. E. Minisonic||M. Pointon||578||Synth
|-
| Aug||1975||P. E. Joanna||A. J. Boothman||650||Piano
|-
| Aug||1975||Ingenuity Unlimited: Fuzz Effect||S. Carter||673||Effect
|-
| Sep||1975||P. E. Joanna||A. J. Boothman||738||Piano
|-
| Oct||1975||Envelope Shaper||E. F. Flint||810||Synth
|-
| Oct||1975||Ingenuity Unlimited: Frequency Doubler||D. Letts||837||Synth
|-
| Oct||1975||Ingenuity Unlimited: Voltage Controlled Oscillator||A. W. Diverall||838||Synth
|-
| Nov||1975||Electronic Tuning Fork||P. W. Busby||882||Test Equipment
|-
| Nov||1975||P. E. Minimix 6||G. D. Shaw||904||Audio
|-
| Dec||1975||Ingenuity Unlimited: VCO Programmer||J. Stott||979||Synth
|-
| Dec||1975||P. E. Minimix 6||G. D. Shaw||998||Audio
|-
| Jan||1976||Audio Compressor||S. Whitt||56||Audio
|-
| Feb||1976||White Noise Generator||J. Hoggarth||150||Synth
|-
| Mar||1976||Synchronome||A. Briar||198||Music
|-
| Apr||1976||ADSR Envelope Shaper||P. R. Williams||288||Synth
|-
| Apr||1976||Sounds Extraordinary||Not given||Supp||Information
|-
| Apr||1976||Ingenuity Unlimited: Frequency Changer For Synthesisers||B.Hatton||326||Synth
|-
| May||1976||Ingenuity Unlimited: Multiple Octave Organ||Pek Yaw Kee||412||Organ
|-
| May||1976||Ingenuity Unlimited: Touch Keyboard||N. B. Sargeant||422||Controller
|-
| Aug||1976||Guitar Overdrive Unit||J. D. Rogers||626||Effect
|-
| Sep||1976||Ingenuity Unlimited: Square Wave Convertor||P. R. Symons||749||Synth
|-
| Sep||1976||Ingenuity Unlimited: Improved Phaser Control||Q. A. Rice||750||Effect
|-
| Oct||1976||Ingenuity Unlimited: Presence Booster for Electric Guitars||N. P. Stevens||829||Effect
|-
| Nov||1976||Ingenuity Unlimited: Patch Panel||R. A. Curtis||909||Synth
|-
| Jan||1977||Ingenuity Unlimited: Guitar Fuzz Unit||J. White||61||Effect
|-
| Feb||1976||Ingenuity Unlimited: Polyphonic Keyboard System||E. F. Flint||136||Controller
|-
| Feb||1976||Ingenuity Unlimited: Percussion Effects||Miss L. Robinson||141||Drums
|-
| Feb||1976||Ingenuity Unlimited: Simple Compressor||Q. A. Rice||141||Effect
|-
| Mar||1977||Autowah||P. J. Goodwin||206||Effect
|-
| Mar||1977||Ingenuity Unlimited: Simple Tuning Fork||Pek Yaw Kee||221||Test Equipment
|-
| Mar||1977||Ingenuity Unlimited: Sawtooth Triangle Convertor||D. F. Bowers||226||Synth
|-
| Apr||1977||Transient Generator||R. Gwinn||296||Synth
|-
| May||1977||Organ Tremelo Unit||L. F. Reeve||338||Organ
|-
| May||1977||Ingenuity Unlimited: Joanna Modifications||D. A. Boyd||381||Piano
|-
| Jul||1977||Synthesiser Tuning Indicator||C. Yallop||522||Test Equipment
|-
| Aug||1977||Ingenuity Unlimited: Guitar Frequency Doubler||P. G. Ludgate||598||Effect
|-
| Aug||1977||Ingenuity Unlimited: Guitar Reference Tuner||W. P. Bond||600||Effect
|-
| Aug||1977||Ingenuity Unlimited: Low Cost VCA||M. Bryant||602||Synth
|-
| Oct||1977||Guitar Sustain Unit||R. W. Voles and B. Cullen||112||Effect
|-
| Nov||1977||128 Note Sequencer||D. G. Evans||162||Synth
|-
| Dec||1977||128 Note Sequencer||D. G. Evans||246||Synth
|-
| Jan||1978||Rhythm Generator||N. A. Cooke||332||Drums
|-
| Feb||1978||Rhythm Generator||N. A. Cooke||432||Drums
|-
| Mar||1978||P. E. String Ensemble||A. J. Boothman||482||Synth
|-
| Apr||1978||Ingenuity Unlimited: Versatile VCO||J. A. Oliver||570||Synth
|-
| Apr||1978||Ingenuity Unlimited: Double Tremelo Unit||S. J. Baxendale||571||Effect
|-
| Apr||1978||P. E. String Ensemble||A. J. Boothman||592||Synth
|-
| May||1978||P. E. String Ensemble||A. J. Boothman||648||Synth
|-
| May||1978||Ingenuity Unlimited: Voltage Controlled Oscillators||E. F. Flint||666||Synth
|-
| May||1978||Ingenuity Unlimited: Voltage Controlled Oscillators||E. F. Flint||667||Synth
|-
| May||1978||Ingenuity Unlimited: The 8038 VCO||E. F. Flint||667||Synth
|-
| May||1978||Ingenuity Unlimited: Repeat/Percussion Circuit||E. F. Flint||668||Synth
|-
| May||1978||Ingenuity Unlimited: Saw to Triangle Converntor Circuit||E. F. Flint||668||Synth
|-
| Jun||1978||Headphone Amplifier||J. P. Macauley||744||Amplifier
|-
| Jun||1978||P. E. String Ensemble||A. J. Boothman||752||Synth
|-
| Jun||1978||Ingenuity Unlimited: Simple Waa-Waa||S. D. Le Maistre||772||Effect
|-
| Jun||1978||Ingenuity Unlimited: Waveform Generator||A. Damper||774||Synth
|-
| Jul||1978||P. E. String Ensemble||A. J. Boothman||834||Synth
|-
| Aug||1978||Ingenuity Unlimited: Envelope Shaper||Stephen Trouse||920||Synth
|-
| Aug||1978||Ingenuity Unlimited: Touch Sensetive Keyboard||P. R. Williams||920||Controller
|-
| Sep||1978||Analogue Computer||P. J. Kronis||970||Other
|-
| Sep||1978||Emphasises Beat Metronome||M. Butt||1010||Music
|-
| Oct||1978||Analogue Computer||P. J. Kronis||1074||Other
|-
| Oct||1978||Ingenuity Unlimited: Synthesiser Repetetive Waveform Generator||B. Hatton||1081||Synth
|-
| Oct||1978||Ingenuity Unlimited: Simple Fuzz||D. McCabe||1082||Effect
|-
| Oct||1978||Ingenuity Unlimited: Accenting Metronome||D. A. Seddon||1082||Music
|-
| Oct||1978||Ingenuity Unlimited: External Input Unit for Synthesiser||P. G. Ludgate||1084||Synth
|-
| Nov||1978||Analogue Computer||P. J. Kronis||1165||Other
|-
| Nov||1978||Analogue Computer||P. J. Kronis||1236||Other
|-
| Dec||1978||Guitar Sound Processor||M. A. Sawicki and A. Kowalewski||1246||Effect
|-
| Dec||1978||Ingenuity Unlimited: Sub-Octave Generator||P. L. Watson||1267||Synth
|-
| Jan||1979||Guitar Sound Processor||M. A. Sawicki and A. Kowalewski||18||Effect
|-
| Jan||1979||ADSR Envelope Generator||D. J. Stephenson||32||Synth
|-
| Feb||1979||Ingenuity Unlimited: Envelope Shaper||A. N. Oliver||45||Effect
|-
| Feb||1979||Guitar Sound Processor||M. A. Sawicki and A. Kowalewski||48||Effect
|-
| Feb||1979||Stereo Mixer||J. P. Macauley||62||Audio
|-
| Mar||1979||Sequencer||Linsay Robinson||22||Synth
|-
| Mar||1979||Ingenuity Unlimited: Simple Phaser||T. P. Hopkins||68||Effect
|-
| Apr||1979||Ingenuity Unlimited: Organ Rhythm Generator||P. Gladdish||25||Organ
|-
| Apr||1979||Sequencer||Linsay Robinson||22||Synth
|-
| Apr||1979||Phaser||D. S. Gibbs and I. M. Shaw||50||Effect
|-
| May||1979||Sound to Light||Ben J. Duncan||28||Other
|-
| May||1979||Low-Noise Pre-Amp||J. Gerrard||54||Audio
|-
| May||1979||Ingenuity Unlimited: Varitone Stylophone||T. J. Barker||70||Organ
|-
| May||1979||Sound to Light||Ben J. Duncan||26||Other
|-
| Jun||1979||Ingenuity Unlimited: Guitar Fuzz/Sustain Unit||A. Niemiro||66||Effect
|-
| Jul||1979||Switched Tone Treble Boost||J. D. Rogers||64||Effect
|-
| Aug||1979||Class A Headphone Amplifier||Stephen Price||62||Amplifier
|-
| Sep||1979||6 Channel Mixer||S. R. W. Grainger and C. R. Harding||18||Audio
|-
| Sep||1979||Ingenuity Unlimited: ADSR Envelope Shaper||P. V. Saduikis||24||Synth
|-
| Sep||1979||Smooth Fuzz||D. S. Gibbs and I. M. Shaw||62||Effect
|-
| Oct||1979||6 Channel Mixer||S. R. W. Grainger and C. R. Harding||50||Audio
|-
| Jan||1980||Ingenuity Unlimited: Phased White Noise||R. Otterwell||37||Effect
|-
| Feb||1980||Ingenuity Unlimited: Waveform Convertor for Minisonic||P. G. Ludgate||62||Synth
|-
| Mar||1980||Audio Isolator||G. Davies||22||Audio
|-
| Mar||1980||Ingenuity Unlimited: Wah-Wah Pedal||Richard Fuller||58||Effect
|-
| Mar||1980||Ingenuity Unlimited: Simple Guitar Tremolo||A. R. Curits||59||Effect
|-
| Apr||1980||PE Congress||Graham Jackson||38||Amplifier
|-
| Apr||1980||Ingenuity Unlimited: Low Noise Mic Pre-Amp||F. R. Williams||65||Amplifier
|-
| May||1980||PE Congress||Graham Jackson||26||Amplifier
|-
| May||1980||Split Phase Tremolo||J. McCarthy||34||Effect
|-
| May||1980||Ingenuity Unlimited: Rhythm Generator for Minisonic||A. R. Bradford||58||Synth
|-
| Jun||1980||PE Congress||Graham Jackson||26||Amplifier
|-
| Jun||1980||Mastertune||B. J. Hamill||39||Music
|-
| Jul||1980||Ingenuity Unlimited: Noise Gate||C. Bishop||59||Effect
|-
| Jul||1980||Ingenuity Unlimited: Stepset Sequencer||P. R. Wiliams||61||Synth
|-
| Sep||1980||Disco Desk||Ben J. Duncan||24||Audio
|-
| Sep||1980||Programmable Sound Generator||D. Coutts||32||Computer
|-
| Sep||1980||Class 'A' Amplifier||K. Garwell||58||Amplifier
|-
| Sep||1980||Ingenuity Unlimited: Function Generator||M. Rodgers||68||Synth
|-
| Oct||1980||Lead Tester||Chris Lane||36||Test Equipment
|-
| Oct||1980||125W Amplifier||Not given||52||Amplifier
|-
| Oct||1980||Disco Desk||Ben J. Duncan||62||Audio
|-
| Nov||1980||Disco Desk||Ben J. Duncan||56||Audio
|-
| Dec||1980||P. E. Master Rhythm||A. J. Boothman||32||Drums
|-
| Dec||1980||Disco Desk||Ben J. Duncan||60||Audio
|-
| Dec||1980||Ingenuity Unlimited: Keyboard Switches||R. M. Pimlott||64||Controller
|-
| Jan||1981||P. E. Master Rhythm||A. J. Boothman||22||Drums
|-
| Jan||1981||Disco Desk||Ben J. Duncan||60||Audio
|-
| Mar||1981||Microphone Mixer||R. A. Penfold||46||Audio
|-
| Apr||1981||Ingenuity Unlimited: Envelope Differentiator||Martin Russ||68||Synth
|-
| Apr||1981||Ingenuity Unlimited: Synth Processor||Martin Russ||68||Controller
|-
| Apr||1981||Ingenuity Unlimited: TVC for Synths||Martin Russ||68||Controller
|-
| Jul||1981||Ingenuity Unlimited: New Voices For Your Organ||B. F. Smith||Supp||Organ
|-
| Aug||1981||Audio Analyser||Michael Tooley and David Whitfield||24||Audio
|-
| Sep||1981||Drum Synthesiser||P. Bailey||50||Drums
|-
| Sep||1981||Audio Analyser||Michael Tooley and David Whitfield||68||Audio
|-
| Oct||1981||Audio Analyser||Michael Tooley and David Whitfield||67||Audio
|-
| Nov||1981||PE Bandbox||A. J. Boothman||32||Drums
|-
| Nov||1981||Ingenuity Unlimited: Accented-Beat Metronome||P. C. French||62||Music
|-
| Dec||1981||PE Bandbox||A. J. Boothman||32||Drums
|-
| Jan||1982||PE Bandbox||A. J. Boothman||37||Drums
|-
| Feb||1982||PE Bandbox||A. J. Boothman||62||Drums
|-
| Apr||1982||Ingenuity Unlimited: Octave Bank for VCO's||Martin Russ||63||Synth
|-
| Apr||1982||Ingenuity Unlimited: Quality Mic Amplifier||Tony Sercombe||64||Amplifier
|-
| May||1982||12W FET PA||R. Immelman||68||Amplifier
|-
| Jun||1982||
|-
| Jun||1982||Sound Synthesis||A. R. Bradford||Supp||Information
|-
| Jul||1982||Audio Test Set||Michael Tooley and David Whitfield||26||Test Equipment
|-
| Jul||1982||Instrument Tuner||Stephen Ibbs||32||Test Equipment
|-
| Jul||1982||
|-
| Aug||1982||Combo Amplifier||Fred Judd and E. A. Rule||26||Amplifier
|-
| Aug||1982||
|-
| Aug||1982||Audio Test Set||Michael Tooley and David Whitfield||48||Test Equipment
|-
| Sep||1982||Audio Debug Probe||Chris Lare||31||Test Equipment
|-
| Sep||1982||Combo Amplifier||Fred Judd and E. A. Rule||56||Amplifier
|-
| Oct||1982||Semi-Professional Mixer||Tim Orr||30||Audio
|-
| Oct||1982||Ingenuity Unlimited: Percussion Synth||R. A. Jagger||57||Drums
|-
| Oct||1982||Mini Chorus Unit||R. A. Penfold||60||Effect
|-
| Oct||1982||Combo Amplifier||Fred Judd and E. A. Rule||66||Amplifier
|-
| Nov||1982||Semi-Professional Mixer||Tim Orr||58||Audio
|-
| Dec||1982||Stylocord||Stephen Ibbs||22||Organ
|-
| Dec||1982||Semi-Professional Mixer||Tim Orr||44||Audio
|-
| Apr||1983||Switched Capacitor Phaser||R. A. Penfold||40||Effect
|-
| May||1983||Personal Stereo Amplifier||R. A. Penfold||55||Amplifier
|-
| Jun||1983||Rocktone||D. Head and P. D'Lemos||26||Test Equipment
|-
| Jun||1983||Percussion
|-
| Jul||1983||Percussion
|-
| Jul||1983||Fairlight Music Computer||Ray Hammond||32||Information
|-
| Sep||1983||Guitar Active Tone Control||A. Scragg||39||Effect
|-
| May||1984||Sustain Unit||R. A. Penfold||26||Effect
|-
| Aug||1984||Ingenuity Unlimited: A Simple VCO||A. Flind||48||Synth
|-
| Sep||1984||Mono/Stereo Echo & Reverb||John M. H. Becker||10||Effect
|-
| Oct||1984||Filter Shift Phaser||John M. H. Becker||10||Effect
|-
| Nov||1984||Ring Modulator||John M. H. Becker||10||Effect
|-
| Dec||1984||Ring Modulator||John M. H. Becker||23||Effect
|-
| Dec||1984||Audio Noise Generator||Tom Gaskell||48||Audio
|-
| Jan||1985||Mono/Stereo Chorus Flanger||John M. H. Becker||10||Effect
|-
| Jan||1985||Ingenuity Unlimited: Accented-Beat Metronome||H. J. Karmazyn||42||Music
|-
| Feb||1985||Modular Audio Power System||M. Tooley and D. Whitfield||10||Amplifier
|-
| Feb||1985||Mono/Stereo Chorus Flanger||John M. H. Becker||59||Effect
|-
| Mar||1985||Modular Audio Power System||M. Tooley and D. Whitfield||40||Amplifier
|-
| Apr||1985||Modular Audio Power System||M. Tooley and D. Whitfield||23||Amplifier
|-
| May||1985||Amstrad Synthesiser Interface||R. A. Penfold||10||Computer
|-
| May||1985||Stereo Noise Gate & VCA||John M. H. Becker||14||Effect
|-
| Jun||1985||An Analogue/Digital Waveform Generator||Tom Gaskell||22||Computer
|-
| Jun||1985||Digital Delay & Sound Sampler||John M. H. Becker||40||Effect
|-
| Jul||1985||Digital Delay & Sound Sampler||John M. H. Becker||44||Effect
|-
| Aug||1985||Computer Envelope Shaper||R. A. Penfold||10||Computer
|-
| Aug||1985||Digital Delay & Sound Sampler||John M. H. Becker||38||Effect
|-
| Sep||1985||Digital Delay & Sound Sampler||John M. H. Becker||50||Effect
|-
| Oct||1985||Modulated Syndrum||R. A. Penfold||32||Drums
|-
| Jan||1986||Modular Mixer||John M. H. Becker||20||Audio
|-
| Feb||1986||Modular Mixer||John M. H. Becker||18||Audio
|-
| May||1986||Notcher Effects Unit||John Simon||24||Effect
|-
| Jun||1986||Guitar Tracker||R. A. Penfold||26||Synth
|-
| Jul||1986||Echo and Reverb Effect Unit||M. P. Horsey||38||Effect
|-
| Mar||1987||Micro Tuner||John M. H. Becker||25||Test Equipment
|-
| May||1987||ADA-Polywhatsit||John Becker||12||Computer
|-
| May||1987||Bright Fuzz||Robby Rockett||34||Effect
|-
| Jun||1987||ADA-Polywhatsit||John Becker||34||Computer
|-
| Sep||1987||MIDI Interfacing||The Prof||19||MIDI
|-
| Oct||1987||Guitar To Synth Interface||Robert Penfold||12||Synth
|-
| Nov||1987||MIDI Extender||Robert Penfold||24||MIDI
|-
| Dec||1987||RS232C to MIDI Convertor||Robert Penfold||12||MIDI
|-
| Feb||1988||Tremolon||John Becker||24||Effect
|-
| Apr||1988||Light Metal Effects||Robert Penfold||12||Effect
|-
| Jul||1988||Ingenuity Unlimited: Waa-Vol Effect Pedal||C.Duncer||33||Effect
|-
| Sep||1988||Ingenuity Unlimited: Simple Low-Cost VCO||T. Thompson||42||Synth
|-
| Dec||1988||Panning Mixer||Robert Penfold||12||Audio
|-
| Jun||1989||Deluxe Metronome||Robert Penfold||12||Music
|-
| Aug||1989||Hand Clapper||Harvey Kent||26||Drums
|-
| Oct||1989||Mono-Stereo Echo Station||John Becker||27||Effect
|-
| Dec||1989||Mono-Stereo Echo Station||John Becker||27||Effect
|-
| Jan||1990||Mini Metronome||John Becker||48||Music
|-
| Aug||1990||AF Octave Measurer||Joe Chamberlain||23||Test Equipment
|-
| Sep||1990||AF Octave Measurer||Joe Chamberlain||23||Test Equipment
|-
| Oct||1990||AF Octave Measurer||Joe Chamberlain||37||Test Equipment
|-
| Mar||1991||MIDI Analyser||R. A. Penfold||10||MIDI
|-
| Mar||1991||Computerised Signal Generator||John Becker||20||Computer
|-
| Oct||1991||Samfex, A Digital Sound Sampling System||John Becker||45||Effect
|-
| Oct||1992||Echo and Reverb Effect Unit||P. M. Horsey||40||Effect
|}
|