This circuit fires with the noise captured by the touch of a sensor. Signal shapes are given next to the diagram. The circuit is from the 80s, using components from that time.
This relay circuit with a dual channel MOSFET (not very common today) was found in an old American...
This circuit was obtained from a Radio & Electronics Constructor in March 1976. The magazine no...
This circuit is from the 1993 Linear Technology Applications. We can implement the same oscillator...