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.
This circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is based...
The circuit illustrated in Figure allows external loads (8) to be driven from parallel port...
The sensor of this circuit is a thermistor of the same value as the adjustment circuit formed by...