This circuit is from a Radio Electronics from October 1970. The circuit uses transistors from that era and has a low impedance output. The resistance R1 depends on the impedance of the input signal.
This shield or interface makes it possible to control power loads connected to the power grid from...
This interesting circuit consists of a calendar whose switching is done by sensing dusk and dawn,...
This 3 and-a-half digit circuit was found in a Teledyne documentation from the 90s. The circuit uses...