This sensitive commutator is based on IC1, one operational amplifier with a high input impedance. When the finger touches Se1 sensor, C2 is charged, this will cause the linear dropdown of the IC1 output voltage. When we touch Se2 sensor the opposite occur.
This sensitive potentiometer circuit has different applications and can be user anywhere is needed a potentiometer wich can be controlled with variable voltage.
If you need normal commutators or buttons place serial 1M resistor.




Sensitive commutator circuit diagram

sensitive potentiometer 300x269

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