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 circuit triggers a load that depends on the characteristics of the transistor when we touch...
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...
This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current...