This 32 A circuit uses SCRs of the time. We found it in a 90s General Electric documentation. The transformer is a commercial type of the time.
This circuit simulates an inductor. Or operational amplifier of old type, but a configuration is...
We found this circuit in a 1967 Electronic Design. The circuit uses contemporary transistors that...
To control relays safely with double insulation, we suggest the circuit in the figure. The optical...