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Electromagnetic Hourglass

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Written by Paul Strauss | November 2, 2022

We’ve seen some unique clocks and timers, but this is the first time we’ve seen one that displays time using the kind of metal filings you’d find in a Wooly Willy toy. B.B. Korry created this electromechanical clock which uses a grid of electromagnets to attract and release iron filings to count down seconds. It’s really loud, though.


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