16 in 1 out video switcher, with remote button box.

Sony Lanc time code display on an alphanumeric 8 character LED display.

Sony Lanc remote pause/rec/stop buttons with serial output of time code for data logging of start and stop times.

LCD shutter viewer for checking if a bar line will be visible through a movie camera.

Radio remote control with 8 buttons to control an AV presentation, with matching receiver to output serial data to a Datatong presentation controller.

Telephone audio interface unit with hybrid circuits for CBS news.

RS232 to relay control interface for a Volvo presentation.

Morse code generator, with TX on, code contacts & tone out. My first PIC12C508 design.

Valve audio amplifier, built to test the feasibility of a higher power unit, using two ECL86 & one E88CC valves with fixed bias. This was a totally balanced design with no feedback, and could handle full power with no speaker connected.

Numerically Controlled Oscillator, programmed by a 32 bit word, to produce a good sine wave from fractions of a Hertz to 30MHz. All at crystal accuracy and with very little phase noise.