This circuit was found in RCA documentation from the 90s. It consists of a power control for a load based on a thermocouple. The integrated circuits are uncommon today.
This version of the Pierce oscillator with the 2N3904 was found in the January 1994 issue of...
This circuit sources a Constant current to a load. The current is determined by R2. In the...
This is a very simple atomic radiation detector circuit using a Geiger-Muller tube. The circuit was...