This simple transistor tester was found in a Japanese magazine in 1967. It tests general purpose transistors of both the NPN and PNP type and is powered by 4 batteries (6 V).
July 1017 - Maxim MAX17290 and MAX17292 PWM boost controllers can now be purchased from Mouser...
This alarm uses several sensors that directly trigger a sensitive relay. A larger relay can be...
This circuit was found in an Electronics World magazine from 1990. The circuit can be mounted...