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ITP students Will Jennings and Lia Martinez built a small catapult (not a trebuchet in the strictest sense) that, when pulled back and released, announces “Banana” and triggers a video projection of said fruit flying into the wall. From Lia’s site:

The technical part wasn’t too difficult. Will wired up the catapult with a reed sensor and an Arduino (we had a back-up tilt switch in case the glass of the reed sensor shattered, but we never had that problem). The Processing code is simple as well, where there are two states and two behaviors depending on the state: catapult up will play this, and catapult down will play this. We used wav files for the audio and a CSV to mark entry points for the video.

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Michael Colombo

Michael Colombo

In addition to being an online editor for MAKE Magazine, Michael Colombo works in fabrication, electronics, sound design, music production and performance (Yes. All that.) In the past he has also been a childrens’ educator and entertainer, and holds a Masters degree from NYU’s Interactive Telecommunications Program.


  • jihgo

    It’s not a trebuchet in any sense, strict or otherwise.

  • your a loser

    epic fail… its not a trebuchet, idiots

  • http://www.karlward.com/blog/2012/10/physical-computing-midterm-brainstorm/ Physical Computing Midterm: Brainstorm | Karl Ward

    […] liked the Cavendish Trebuchet because the interaction was really simple and well-mapped to the result, which was surprising and […]

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