Using the Arduino platform, a lot of servos and an incredible variety of objects, Gabriella Levine has made a robotic water snake. Although this sounds rather far-fetched, it really works. The servos are controlled using her custom library to replicate the motion of a real snake, causing a degree of propulsion and steering. To protect against moisture the servos have been modified, and a variety of greases and sealants are used to keep it dry inside the tube. The snake is a work of art and really works well, for example:
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