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One of the unsolved challenges posed by the authors of the very fine "Building Robots with Lego Mindstorms" is to construct a robot that propels itself jumping, rather than walking on legs or rolling on wheels. Neither pretty nor smart, Jump-O-Bot manages nonetheless to perform the task it's designed for: maintaining a consistent and sustainable cycle of jumps that move the robot forward. This 35-piece version is in fact the first prototype that performs according to those standards. I am releasing it in its present crude version to encourage building and experimenting by other builders - how about a Spring-O-Matics contest?

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