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).
Common operational amplifiers can be used on this circuit. The resistor with no value in series with...
The purpose of this circuit is to detect the movement of a person by the changes in light that...
Found in an Analog Devices documentation from the 90s, this circuit uses a component of the time,...