Tyree--the Smiling, Tail Wagging Robot
thingiverse
Tyree is a joyful, wagging-tailed 3D printed robot that lacks sensors. Despite this, he can detect motor current when colliding with objects, prompting evasive maneuvers. Essentially, Tyree's wheel turning difficulty due to obstacles serves as his 'sensor'. Detailed instructions for creating this unique bot are available at http://www.instructables.com/id/Tyree-the-Smiling-Tail-Wagging-Sensor-Less-3d-P/. This robot was crafted using a MakerBot Replicator.
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