Touch controlled voltage source (CB22141E)

We found this circuit in an old English documentation. Transistors support modern equivalents.

High Sensitivity Fan Control (CB15519E)
Great sensitivity for the circuit can be obtained with a Darlington amplification step for the...
Class D Experimental Amplifier (CB5009E)
This 2005 circuit was found in an English publication and can be implemented with virtually any...
Vehicle Alarm (CB4867E)
This car alarm was found in an American '80s documentation. The circuit automatically activates...