This circuit was found in a 1967s Motorola documentation. The circuit regulates the voltage of an alternator for automotive use, for bench applications.
This flip-flop controlled by an LDR-type photocell was found in Radio Electroinics magazine from...
This relay circuit was found in a 90s American documentation. The transformer windings are...
This circuit simulates a multi-position switch using programming buttons. The circuit is from an...