Have you ever played with the Neodymium magnets out of those things? Super powerful. DO NOT GET YOUR FINGERS BETWEEN THEM. I take the hard drive apart and steal the magnets..saving up to build a big wind turbine alternator.
http://www.otherpower.com If the motor still works, it's a cool thing to salvage as well.
Your hard drive is sealed from dust, once you open it and anything touches the platter it's almost guaranteed useless. So it's pretty easy to take the next step and destroy the platter if that's what you're into.
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