✦Crystal Radio - Parts: A crystal earphone, a ground connection and a 50,000-watt AM transmitter.

✦Carbon-mic intercom - Parts: a carbon microphone (a variable resistor), a speaker and battery.

✦Semiconductor Fucker - a transformer and a battery. (Hey. I was only 8 years old at the time)

✦Lux Meter - a solar cell and a meter.

✦Audio Signal Generator - my first electronic kit

✦Digital White/Pink Noise Generator - using one chip from Tandy Electronics (part now discontinued)

✦X-Y Laser Deflection System - 2 speakers connected to mirrors, a stereo amp and some software, amplifiers and a laser.

✦Realtime Bandpass Audio Spectrum Analyzer - A HUGE project which might have worked great if I'd known what the Nyquist rate was.

✦Talk-back intercom - Used for communication in live music production.

✦UItrasonic Interferomic Microphone - Measuring sound using sound.

✦Realtime Fast Fourier Transform (FFT) Spectrum Analyzer - Poor response when written in BASIC and running on a 4 MHz processor.

✦Midilink - A device for transferring MIDI data over very long distances.

✦Pulsed Reluctance Motor - My first experiment into REALLY weird devices.

✦Gravitional-warp Capacitor Array - My second REALLY weird device. It's how UFOs fly. I was told it would work. It didn't.

✦Fluid Vortex Propulsion Device - Uses a ring vortex for propulsion. Still not built.

✦Various Unix FTP commands - Got my first internet connection (a UNIX shell account).

✦Parabolic Microphone - A microphone and a dish.

✦Ring Vortex Detonation - Too dangerous to complete.

✦Tentertainment System - A portable battery powered stereo, light, gas heater, 240v inverter for use in a tent. The battery went flat after about 2 hours and I was too nervous to leave the gas heater running while asleep in the tent.

✦30A var. DC Supply - A large transformer, some large caps and diodes. Variable for about 5 minutes before the output transistors blew.

✦TVDI - Plug your electric guitar into the motel room TV.

✦4WD Wheel Winch - Fits to the front wheels of a 4WD to make a winch. Never built.

✦Balanced Instrumentation Amp - A high-gain op amp.

✦Dual Regulated Power Supply +5; 0; -5 volts.

✦Jacobs Ladder - Fun and dangerous.

✦Tesla Coil - Fun, dangerous and painful.

✦The Colorwand- I sold a few of these expensive toys.

✦Noise-Canceling Headphones Put these babies on ... if you're brave enough.

✦Pulse-width Modulated Voltage Regulator - using one LM555 IC. Works great.

✦AF/RF Sweep Frequency Oscillator - a handy piece of test equipment.

✦Electric Pushbike - Harder to build than you think.

✦AM Broadcast Transmitter - Fun and illegal.

✦FM Stereo Transmitter - Using the BA1404 chip. Fun and almost illegal.

✦Poynting Flow Vector Thruster - Unconfirmed thrust. But not for me.

✦Parabolic Hydrophone - It got wet and didn't work.

✦Relay-switched Marx Generator - Used to start a xenon bulb in a parabolic reflector for an spotlight Bright enough to cook things at a distance.

✦High Voltage Generator and built a Bipolar Cascade Voltage Multiplier to boost it's output voltage.

✦Vortical Charge Separation test - Top secret. (Still in progress)

✦Radiant Energy Research - Interesting with unresolved problems.

✦One Atmosphere Uniform Glow Plasma Panel - It glowed.

✦Ozone/Al Fuel Cell - An incredibly small amount of energy was generated.

✦Electrohydrodynamic Thruster - A 'lifter'.

✦Setup for observing ion-wind - which is generated sharp, highly charged electrodes.

✦Toroidally-polarised magnetic device - Never built, hard to imagine.

✦PZT thruster - Might work but didn't for me.

✦Vortex Research - Interesting and beautiful to see. (Still in progress).

✦Pressure Safe No information available at this stage

✦Miklos Tube test What's going on here?