We found this multiple thermostat circuit in July 1980 Radio Electronics magazine. It uses opto-triacs for power control and operates on a 117 VAC mains.
November 2016 - Mouser Electronics already has the new Microchip MCP1810 Low Dropout (LDO)...
This bistable touch sensor circuit uses a relay and is very sensitive. We found it in a 1990...
This transmitter has a few watts of output power, having been found in a 1997 documentation. L1...