Found in a 90s Elektor, this circuit makes use of general-purpose transistors, except T4 that can be replaced by an equivalent.
This circuit was found in an English operational documentation from 1970. The circuit can be...
This circuit was found in a 90s EDN. It activates a protection relay in case of reversing the...
We found this receiver on a single chip in the 1976 Siemens integrated circuits manual. The...