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Everyone and their grandmamas are building cool clocks these days, and Viacheslav Slavinsky‘s “Strobeshnik” is another example. Viacheslav etched stenciled numerals into a HDD platter and strobed LEDs behind the platter to show the time.

Strobeshnik uses stroboscopic effect to create the illusion of persistent numeric display. The hard drive platter has 10 digits, colon and dash marks, cut all the way through it. Behind the platter, in the HDD chassis, there is a PCB with groups of diffused LED’s. Groups of LED’s in each character position can be strobed independently at any given time. By careful timing of the light strobes, an illusion of still-standing numbers can be created.

See the project description for schematics, Eagle files and source code.

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal nerdage.net


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Comments

  1. Marc de Vinck says:

    It’s still a POV clock……and by far my favorite version! Love it!

  2. Myself says:

    That’s very similar to how chain printers [used to] work. Essentially, a chain with type on it (think linear daisywheel) whizzes around in a loop in front of the paper. For an 80-column printer, there are 80 hammers, which smack the paper against the chain, with the inked ribbon trapped between, at precisely the moment when the appropriate letter is in front of the column in question. They were fast and noisy, but in 1959 that was an acceptable tradeoff!

    Unlike such mechanical beasts, the optical version makes no noise, thankfully. :)

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