This power supply circuit for high power audio amplifiers was found in Radio Electronics from the 90's. Power MOSFETs admit modern equivalents. The output current is 5 A.
This circuit for igniting gas flames was found in a 1967 Electronic Design. The SCR firing device is a...
We found this circuit in a 1966 US documentation. It simulates a variable capacitor that can vary...
Found in Radio Electronics, this circuit is intended to activate the lighting system of garages...