It's possible to get some crazy sounds using an EBow on the guitar. I know that it works by creating an electromagnetic field to move the strings. Has anybody tried to build one? Are any schematics available?
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2The ebow doesn't just use an electromagnet, it also senses the pitch of the string using a small pickup, and amplifies the pitch using the electromagnet causing the sustain. If it didn't use a pickup, the pitch it would have to use an arbitrary frequency, which would cause the string's vibrations to cancel or switch to odd harmonics. – Mar 05 '11 at 16:58
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You might also get answers at [the Electronics SE site](http://electronics.stackexchange.com/). – Goodbye Stack Exchange Mar 05 '11 at 18:52
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Take a look at this page. It provides some decent background technical information.
It sounds like a fairly interesting DIY project, considering as real ones go for over £70-80!
Hope this helps.
Ali
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of course calling the contraption an e-bow (and especially trying to sell it) would cause you serious legal trouble. It's a trademarked name, and there might be patents involved as well. – Mar 07 '11 at 07:00