In this project we are going to build the most annoying thing one could imagine... THE THEREMIN!
By using a photoresistor to detect ever-so-slight changes in light when we move our hands, our microcontroller will change the pitch and volume of the speaker output to create different notes!
A person playing an actual theremin will move one hand to change the frequency of a note and the other hand to alter the amplitude (volume). Check out this video from SciShow to learn more!