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, which uses an unusual integrated, is from the Motorola Linear Databook of 1990....
This circuit is used to test an inductor (coil) allowing the observation of its opration in an R-L...
This analog to digital converter was obtained from an American documentation from the 90s. Used...