This circuit was found in an old American documentation. Its purpose is a proportional scanning signal for the oscilloscope of the time, which used cathode ray tubes.
This dimmer or light control for incandescent light bulbs or even small heaters, is one of many...
This alarm with sensors in series and parallel was found in the 1995 Encyclopedia of Electronic...
This circuit was found in an American 1960s documentation. The circuit uses transistors of the...