OK so i just thought of something, but I don't know if it can be done. Ive googled and such, but i was unsuccessful. Is it possible to take an audio frequency and create electricity? Similar to a solar panel, but the instead of taking light, i take sound. Ive seen on instructables those LED candles that play a song. You can hear it with a solar panel and an amplifier. I want to know how to do the reverse. Could I take a sound, and power something with it. it would have to have SOME power to begin with, i would assume. maybe a charged capacitor? maybe i would take a microphone and somehow convert it into power (not data) I don't know how to do this. Does audio have positive and negative leads when connected to a circuit? this is really cool. I could charge my cell phone by talking on it! I could scream at my light bulb for being turned off (due to know power) and watch it light!
could anyone please either post an instructable (and let me know), post a detailed explanation on how to do this, or post a link to said detailed explanation