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.
The voltage reference integrated circuit used in this 1980s unit is hard to find today. The power...
The circuit presented was suggested by National Semiconductor in its Linear Applications Handbook. The...
This low frequency oscillator with an operational amplifier of type 741 has adjustment of the mark...