This circuit appears at various points on this site and in this section and can be designed with almost any operational amplifier. This version is from an American documentation from 1975.
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...