Found in a 1970 documentation, this SCR bistable can be implemented with modern equivalent SCRs. Observe the controlled loads.
This is a typical source of the time (1989) using the well-known regulator integrated circuit 723....
This 8 A high output power amplifier uses two National Instruments LM12s. The maximum capacity of the...
Found in Popular Electronics from the 90s, this circuit turns off an appliance at the end of the...