This circuit with SCR is from a Radio Electronics magazine from September 1965. It is a commercial control from Heathkit for controlling universal motors.
Found in American documentation from the 1990s, this circuit oscillates at a low frequency when a...
This circuit was found in a 1973s Japanese publication. The power transistors used are of the era...
This strobe light circuit with xenon lamp was found in a 1995 documentation. The circuit is...