This uses a very old parallel keyboard with a new life with PICAXE projects
A replacement using a 14M2 for a 19-year-old discrete IC wire-wrap board
Uncharacterized
projects
A thermostatically-controlled
Exhaust Fan.
A LED strip activated by radar used as a nightlight
LEGO Castle
A fun project made entirely with LEGO blocks and embelleshed by flashing colored LEDs
A 10 cps mechanical counter with a choice of voltage or contact-closure input.
Op Amp with differential inputs and both fixed and external custom feedback.
John’s contributions to the SNOTEL Master Station
This is a window fan which switches on when it gets cooler outside
A remote control for the garage door
This is a battery-powered microwave motion sensor using doppler radar technology. It has its own indicators and relay plus control and information 433 MHz transmissions.
2x25W amplifiers
FM Radio
This is a battery-powered FM radio base on a Si4703 single-chip receiver. It is inside a 1950’s era AM radio box and front panel I made in England before emigrating.
This is the wooden Art-Deco cabinet of a 1941 GE model LCP-609 AM tube radio, with entirely modern electronics inside