LM3900 Rectangular Oscillator (CB25179E)

This 1 kHz oscillator uses a Norton LM3900 operating system. The frequency depends on C1 and R1 and can be changed.

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...