Found in the July 1980 Radio Electronics magazine, this circuit uses an integrated circuit from the time and a power Darlington. The Darlington must be equipped with a heat sink.
This circuit is from a 1998 Electronics Now and can be easily assembled since it uses a common...
We find this circuit in an American 80's documentation. No further information about the...
With this circuit, an external circuit can be controlled by turning it on or off and reversing it (if...