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Instructables user Back Roads just posted this tutorial describing the low-cost pneumatic system he hacked together to build this haunted house prop. [via Hack a Day]

Make: Halloween Contest 2009

halloween 09 How To:  Pneumatic pop up Halloween screamer

Microchip Technology Inc. and MAKE have teamed up to present to you the Make: Halloween Contest 2009! Show us your embedded microcontroller Halloween projects and you could be chosen as a winner.

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.

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