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).
Using an old integrated circuit, this low power amplifier, on the order of a few watts, includes tone...
This wired intercom circuit was found in an English publication from the 80's. The integrated...
It is an ideal assembly to be implemented as work by students of digital electronics courses, as...