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.
Remember what I said last week about water supplies?
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I wrote about the need for reserve supplies of water just last week. It's
emerged that my country of origin, South Africa, appears set to become a
la...
7 hours ago
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