.. From a recycled hot water service heater!
Custom control panel and electrical design for a 10kg Cafe Coffee roaster. 'Cause my buddy asked me to!
Yet Another Current Load, using eBay volt meter, with High / Low ranges and Set / Sense switching.
Hombrew 4 channel isolated voltage / current meter with microcontroller selectable gain, autoscaling, without using expensive reed relays!
A replacement for costly home alarm monitoring - Emulates a phone line to answer the panel, decodes the ADEMCO DTMF signals and sends notifications via SMS.