Spin an old harddrive with a Soleniod

I got a kick out of this since it reminds me of steam power engines.  The author basically re-uses most of the hardrive and just attaches a bar from the heads (motor driver) to the platters.

http://hackaday.com/2015/02/21/spin-up-an-old-hard-drive-with-a-solenoid-motor/

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