NPN and PNP transistor tester (CB22146E)

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

Cat Meowing (CB12623E)
The critical components of this project from a 1978 publication are the transformers, which can be...
Control for miniature railroad (CB8761E)
Found in a 90s Popular Electronics, this circuit can power a miniature railroad with voltages of 15...
AH1389 Hall Effect Unipolar Switch
August 2017 - Mouser Electronics is now offering the Diodes Incorporated AH1389 Hall Single-pole...