With the configuration shown in the figure, we have the relay being activated when the microphone picks up a sound and shutdown when the X1 reset sensor is activated.
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...