This is one of the many versions we have of a 12 V power supply with the 7812. We found it in the Radio Electronics magazine of July 1984. The integrated circuit must be mounted on a heat sink.
In this circuit, a switch, reed-switch or sensor is used to control a half-wave alternating...
This circuit is from an old Electroics Now. Its purpose is to protect the fax and modem lines of...
This circuit uses a thyristor (four-layer device) in a trigger circuit that works like a...