This circuit delivers at its output a voltage that proportional to the amplitude of the input signal in a range of 36 dB. We found it in an American documentation from 1966.
This anti-bounce circuit was found in a 1967 US documentation. Modern transistors such as the...
This metronome circuit was found in an American 1980s documentation. The circuit uses the 4001...
This continuity tester for low resistances was found in an English magazine from 1978. The circuit...