This circuit triggers by choosing the higher of two voltages. The circuit is from a 1964 Electronic Design. The transistors are of the time and can be replaced by current equivalents.
We found this circuit in a technical documentation from the 70's. Any double-gate MOSFET can be...
We found this thyristor power supply in a 1987 documentation. It uses common SCRs as rectifiers and...
This simple circuit has its trigger point set in the trimpot. The transistor can be any general...