Found in American documentation from the 1970s, this circuit can be designed based on a modern SCR, such as the TIC106. The SCR must be provided with a heat sink.
This small audio amplifier uses germanium transistors and a 12 V supply. The circuit is from a...
This low-current control circuit has a lamp as a load, but can have other types of devices, such...
This circuit transforms your low sensitivity analog multimeter into an electronic voltmeter with...