Found in documentation from the 1980s, this highly sensitive circuit is based on the conduction by the presence of gas from an ionization chamber. The components are from the time.
This 1998 circuit controls the volume in a stereo system by touching switches. The circuit is for...
A 25 mVpp applied to the input of this circuit produces in the output a 1 Vpp signal. The...
The basic integrated circuits of this 1988 multimeter are no longer very common today, but if...