This circuit comes from a Gernsback Publications of the 90s. The circuit uses a general-purpose transistor as a sensor. The power supply must be symmetrical.
This circuit was found in a General Electric documentation from 1965. The purpose of this circuit is...
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....
This circuit was found in a 1966’s NASA documentation. The circuit shows how to use thermistors...