This circuit was found in a 1967 EEE. The components are from that time, but the circuit can be implemented with modern equivalent components.
This rapid response amplifier uses an integrated one that is not common today but can be...
This 2000 circuit, found in the documentation of the time, is intended for charging this type of...
This sensitive electroscope uses a MOSFET 3N128 and can detect electrostatic charges of objects....