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Make: Technology on Your Time Volume 25 by Mark Frauenfelder

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Make: Projects

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Photograph by Garry McLeod

Our “Big 3” projects will make you the hit of the neighborhood. Wow your friends with a model rocket whose spring-loaded helicopter rotors pop out for a gentle return to Earth. Then, keep them guessing with a gumball machine that knows your secret knock. Finally, treat them to a unique, slow-cooked gourmet meal, sous vide style.

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