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 low-pass filter was found in an American publication from the 80's. The circuit uses an...
This continuity tester for low resistances was found in an English magazine from 1978. The circuit...
This low-pass filter with 741 op and symmetrical source was found in the August 1993 issue of...