Common collector stage (CB22226E)

This circuit employs an old germanium transistor. The circuit is from a 1950s publication and uses RC coupling.

Emergency Lighting (CB5948E)
This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's...
Simple Transistor Test (CB3815E)
This ttransistor test was found in a 1987 documentation. It is a simple oscillator that allows to...
Touch Activated Motor (CB1547E)
In the circuit of the figure we used a potentiometer of 1 k ohm. We can use a larger...