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.

Operational Transistor Control (CB12177E)
With this circuit it is possible to control an operational amplifier so that it switches an input...
6 V Battery Eliminator (CB13205E)
The purpose of this simple stabilized source, obtained in a documentation from the 70s, is to...
Signal Tracer (CB921E)
This circuit consists of a good perfromance audio amplifier powered from two or four batteries and has...