Found in the May 1988 issue of Radio Electronics magazine, this circuit is sensitive to small variations in input voltage. The power supply must be symmetrical.
This simple transistor tester uses a common 3 mA analog instrument that has its scale changed as...
This circuit was obtained from an English publication from the 70's. The circuit is still current for...
This commercial circuit N-101 was obtained in a Japanese publication from 1971. It is a typical...