This time the game got serious! Photoresistors and logarithmic potentiometers were deployed for the 'circuit warriors' armed with Star Wars swards in Pitch Bend modulation...
**
So, what are them?
A potentiometer is a three-terminal resistor with sliding contact in the center. For us it worked as a variable resistor, manually adjustable and sound empowering.
A photoresostor is a particular kind of variable resistor whose resistence decrease with increasing incident light intensity. Technically if the light falling on the device is of high enough frequency, photons absorbed by the semiconductor give bound electrons enough energy to jump into the conduction band. The resulting free electron conduct electricity, thereby lowering resistance.
Aaah that's why the finger..!!
**
Here a little demonstration:
