This triac circuit was found in the October 1987 Radio Electronics magazine. The triac is load-dependent and must be mounted on a heat sink.
In the original version of this 1987 circuit, the loads are lamps, but it can be adapted to drive a...
This transmitting circuit for an infrared intercom is from Texas Instruments. The operational...
This circuit emits a sound at regular intervals to prevent you from falling asleep, for example. It...