We found this circuit in an EDN from the 90s. The circuit is a voltage quadruplicator using operating equipment of the time. The output current is low.
This circuit is from an American 1964 documentation. Transistors of the time are used, but modern...
This protection circuit for battery chargers was found in an old Elektor. The relay is according to...
Found in an Electronics Now from the 90s, this circuit is used to control the supply of...