This is a diagram of a 1970s reel or tape recorder. It is an Italian Geloso recorder, quite popular at the time. The circuit is a reference for equipment recovery.
This circuit can convert an AC voltage signal into a current up to 1 A for powering a load. The...
This continuity tester for low resistances was found in an English magazine from 1978. The circuit...
The purpose of this circuit is to maintain the liquid level of a reservoir between two values...