Transistor Tester (CB21956E)

This transistor tester was found in a publication by Gernsback from 1960. The circuit can be used with current transistors.

Nicad charger (CB9543E)
Found in National Semiconductor documentation from the 90s, this circuit makes use of components from...
Capacitance Meter (CB25988E)
This circuit was originally designed to measure capacitance with an ICL7107 but can be used with...
Receiver TDA7000 (CB15974E)
The TDA7000 is a Philips integrated circuit that contains a complete FM receiver with the need for...