Piezoelectric Crystal Speaker Build
If you are into high end audio this project is probably not for you. If you are into tinkering with electronics then dig in. RimstarOrg shows us how to build a Piezoelectric Crystal Speaker. He took a Rochelle Salt Crystal that he made and electrically connected to it using some tinfoil, once rubber banded to a tin can for amplification the speaker was complete. When an alternating voltage is