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A demonstration of Michael Una's Beep-it optical theremin synthesizer, which outputs a square wave whose pitch is variable in relation to the amount of light striking a photocell mounted within the device.

These fine musical instruments are available for purchase here: etsy.com/view_listing.php?listing_id=17195375

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  • Craighton Berman 1 year ago
    Michael, this is brilliant!
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  • Shin Kawasaki 11 months ago
    AWESOME - I'm getting one RIGHT NOW!
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  • Math Rosen 8 months ago
    Wonderful!

    The question now is... do I buy two?

    Is there a way to lock the switch in the ON position, so that it can be operated one-handed?
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  • Rejoice Now.Mov 11 days ago
    Hi. This is really cool. You mention in your video offering instructions on how to make these. I am an electronics student and would love to use this for a project. Thanks!
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