We found this circuit in 1964 General Electric documentation. The circuit works with mechanical drive and can be adapted to operate as a didactic shield sensor.
This 2004 circuit is based on the ionization effect that occurs in old incandescent lamps with...
This bidirectional current sensing circuit was found in a 2005 Linear Technology application manual....
This circuit can be used in decoration or to draw attention, in a “fake” assembly for example. What he...