The Music Prism is a project for a Physical Computing class created using an Arduino. When the user taps the side of the prism, a light and a note is emitted. Depending on which side of the prism is lying on the ground, a different note is created.
Video of the final version: The speaker inside was slightly too weak for the project, therefore the note is harder to hear than in the prototype video.
The schematic and inside wiring:
Video of the prototype:
