Found in a 90s American documentation, this circuit uses an integrated from the time that is difficult to obtain today. The sensor is a common photodiode.
Light falling on the transistor changes both the mark and the space of the generated signal thanks to the...
This FM receiver tuning step circuit was found in a 1960 documentation. No information about the...
This circuit is from an old documentation from the 80's. The circuit provides an output signal for a...