NPN and PNP transistor tester (CB22146E)

This simple transistor tester was found in old English documentation. Suitable for general purpose transistors.

Power supply circuit with separate sources (CB25186E)
This circuit uses separate sources for the power supply and the operational stage. The output...
Electronic Tornado (CB25108E)
This is the well-known lightning lamp that was published in the March 1988 issue of Saber...
Dwell Meter (CB4961E)
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...