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 detector uses an unusual sensor today. The circuit is from an 80s documentation. Its...
Found in a 90’s Popular Electronics, this circuit applies to almost any operational amplifier. With...
This circuit divides the voltage of a 6 to 15 V source by 2 in order to obtain a symmetrical...