Physicist Michio Kaku : The Screensavers on TechTV.

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Artificial Intelligence
Physics
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This is a hard drive clock I built from a 3.5" hard drive, some tri-color LEDs and a PIC16F252 microcontroller. It works by shining the LEDs underneath a platter with a slot cut into it, and by timing the various colors it can produce an analog clock display as well as other patterns.

I got the idea from this page:
http://alan-parekh.com/project s/hard-drive-clock/

And here is my page with more details:
http://www.ian.org/HD-Clock/

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A high-voltage arc caused by a 500kV Switch opening up in the Nevada Desert. An enormous Jacob's Ladder

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