This static switch circuit or solid-state contactor was found in a Motorola documentation from 1968. The circuit can control a 5 A load with the indicated transistor.
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...
We found this circuit in a Radio Electronics from January 1967. The SCR is already the C106, which...
This power source with silicon diodes at a time when valves were still used was found in Radio...