This circuit is from an old documentation from the 80's. The circuit provides an output signal for a warning or alarm system that indicates when a fuse or circuit breaker opens.
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...