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.

Unregulated power supply (CB22341E)
This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...
Nicad Protected Charger (CB6396E)
This circuit is from a 1968 documentation. It makes use of thermistors (NTC) to indicate...
Small 3-Stage FM Transmitter (CB20405E)
This small transmitter has an RF amplifier stage with coupling made from the central socket of the...