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.
September 2016 - It can be purchased from Mouser Electronics the new antenna tuning circuit from...
This circuit uses a selector switch to select resistors for timings given in seconds. Capacitor C1 can be...
This circuit trips when the input voltage exceeds 13.8 V, which is an important value in the case...