ABSTRACT
As we have seen in our earlier experiments with toy clocks and simple oscillators, the photoresistor changes resistance in response to changes in light level. Th is change is resistance in turn aff ects the speed of a clock or pitch of an oscillator. A photoresistor can also be used as a kind of gate or volume control to pass, block, or fade any audio source (such as the output of a CD player, a hacked toy, or a microphone).
