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This charming Knock Clock was made by three Copenhagen Institute of Interaction Design students for a 48-hour design project. When you knock on the top of this minimalistic wooden box, it knocks back the time of day (to the nearest quarter hour). It even has a basic alarm function, which—naturally—is set by knocking as well. [via Adafruit]

Update: Check out the interior of the Knock Clock here.

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Matt Richardson

Matt Richardson

Matt Richardson is a San Francisco-based creative technologist and Contributing Editor at MAKE. He’s the co-author of Getting Started with Raspberry Pi and the author of Getting Started with BeagleBone.


  • http://www.facebook.com/profile.php?id=1157060162 Ali Essam

    New and cool idea

  • http://www.facebook.com/mikecpayne Michael Payne

    I want one

  • http://www.facebook.com/profile.php?id=1244563591 Pete Rippe

    i like too, just not the servo sound…a solenoid might mimic the original knock 

  • http://www.facebook.com/profile.php?id=1244563591 Pete Rippe

    i like too, just not the servo sound…a solenoid might mimic the original knock 

    • http://twitter.com/AntlersAnchors Michael-Owen Liston

      Hi Pete, we couldn’t agree more – we weren’t able to find any solenoids on short notice, however! ;) Glad you enjoy the project, though.

      • http://www.facebook.com/profile.php?id=1244563591 Pete Rippe

        could make a simple coil-on-a-nail, that pulls a magnet with a swinging hammer, i don’t recall just how strong one of these would be tho

      • http://www.facebook.com/profile.php?id=1244563591 Pete Rippe

        could make a simple coil-on-a-nail, that pulls a magnet with a swinging hammer, i don’t recall just how strong one of these would be tho

  • Adam Eyring

    Very clever for its simplicity. I would put the photoresistor on the side instead of top so dust doesn’t accumulate in the hole and make it difficult to keep clean.

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