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.

Automatic TV turn off (CB10090E)
This old circuit from a documentation from the 70s disconnects a TV from a signal obtained on the...
20 Wrms Transistor Amplifier (CB17226E)
This traditional complementary symmetry circuit provides 20 W of rms power at a load of 8 ohms...
Constant current source (CB21992E)
Using a CA3130 and a power transistor, this circuit can deliver a current of up to 500 mA with the...