This circuit was found in an American documentation from 1968. The circuit generates ladder-shaped signals adjusted in a potentiometer. Equivalent transistors can be used.
This circuit is intended to limit the ringing time of a bell. Even if the button is kept pressed for...
Suggested by a 90s EDN, this circuit supports almost any LED as a source and a phototransistor as a...
This 60’s commercial flash was found in the march 1961 Radio Electronics Magazine. The circuit uses...