Regulated power supply (CB20555E)

This circuit uses the 7815 regulator to obtain a voltage for motor control num shield for PC. The circuit is from a documentation of 1996.

Simple Transistor Test (CB3815E)
This ttransistor test was found in a 1987 documentation. It is a simple oscillator that allows to...
Emergency Light (CB924E)
Although it was found in a British magazine 1976, this circuit can be easily upgraded with the...
100 kHz Crystal Oscillator (CB4853E)
This configuration often addressed on this site is from a 2000 documentation. The circuit can be...