Found in an old Popular Electronics, this circuit warns when a remote lighting system is not working. The circuit uses an LDR as a sensor and the components used are quite common today.
This circuit was found in the November 1992 issue of Radio Electronics magazine. The circuit has...
This simple power reducer, based on capacitive reactance, was found in a 1995 documentation. The...
This relay circuit is intended for reversing small DC motors. The circuit is from an old...