This circuit consists of an electrostatic sensor that can check if a cable is energized by simply approaching it. The circuit is from an Electronics Now from December 1998.
We found this circuit in Ferranti's 1974 transistor manual. Transistors are general-purpose types...
This circuit was found in a Dutch documentation from 1970. The circuit makes use of semiconductors that...
The scratching noise is quite unpleasant for those who pass the sound of vinyl records to other...