This dual-operator thermometer circuit was found in the September 1982 issue of Radio Electronics magazine. The sensor consists of a general-purpose transistor.
We found this circuit in a French technical documentation from 1982. The circuit is still current, as...
This circuit from a Radio Electronics from February 1966 uses an LDR as a sensor. The transistor is a...
This circuit is from a 1968 General Electric manual. It produces a pulse of light when fired,...