Old-fashioned
clock |
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Sasha Jevtic built a spinning analog clock.
(click on some images to enlarge) |
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Closer view |
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The clock face is formed by a row of LEDs spinning 30 times per second on a synchronous motor. |
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A prototype of the circuit. A microcomputer is onboard. |
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The printed circuit board had no errors, on the first try (unusual!) |
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Two arms of the board carry a row of LEDs |
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Since the whole circuit board spins, power is brought in through these slip rings, contacted by graphite brushes. |
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The schematic. Click on the image to see the whole thing, (pdf) |
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The printed circuit board layout. Click on the image to see the whole thing |
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What the clock runs on. |