An electronic tambourine that is completely powered by the playing of the instrument. Yellow LED lights on the jingles light up when the corresponding piezo is rattled. The harder the tambourine rattles, the greater the voltage generated by the piezoelectric elements and the brighter the light. If the tambourine is rattled with enough force, blue and red LED lights on the band also light up. Thus, the player can both hear and see the music generated by this instrument.

This project is based on the energy harvesting shoe project from the Responsive Environments Group.
Jie Qi: "I’m interested in the questions that arise when we use circuits and programming as raw materials for creating art– especially the magical possibilities that these techniques and materials enable, and the resulting effect on our aesthetic experience of modern technology."    http://technolojie.com/piezo-powered-tambourine-6/