This circuit was obtained in a General Electric documentation from the 80's, and can be used as a shield. The circuit supports current equivalent components.
This circuit was found in a 1973 magazine, but it can still be assembled using modern equivalent...
Found in a 90s Elektor, this circuit deactivates a source in case of excessive current. The relay...
This circuit was found in an American 80's documentation. The operational may be a modern type...