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 for several frequencies was obtained in an American documentation from the 90s. The...
The 2 uF capacitor used in this circuit must be of excellent quality with a minimum of leakage to...
When the 24 V battery voltage drops below 18 V, this circuit cuts off its discharge. The circuit...