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http://www.popularmechanics.com/technology/industry/4224763.html

Ever noticed how powerlines and clotheslines oscillate in the breeze causing them to "sing"?

Shawn Frayne did, so he stuck a magnet to the oscillating wire, and put coils of wire in the frame. The rest is history.


hattip
shellybear

http://community.livejournal.com/zombie_survival/545136.html?thread=7946864#t7946864

Comments

( 1 comment — Leave a comment )
(Deleted comment)
thekit
May. 21st, 2009 10:50 am (UTC)
I think we could probably build one out of wood, with an old fan belt, the magnets and coils from a dead hi-fi speaker and four diodes (the diodes are needed to make a bridge rectifier).
( 1 comment — Leave a comment )

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