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 was obtained in a 1970 engineering documentation. The operational is the 741, but...
A version of a monostable that uses the 4528, but is triggered by negative transitions of the...
The CMOS 4046 integrated circuit is seldom used, both due to the difficulty of finding it and the...