Sit & Stand Mechanical Man
thingiverse
Demo video can be seen here. https://youtu.be/qnd-QQArHQ0 Build video #1 the base the battery and the legs. https://youtu.be/0WxRUOiPqnc Build video #2 the body and arms. https://youtu.be/0epFptVg-VY Build video #3 the Head. https://youtu.be/7UbKOKwlNYI Version 2 of the robot can be seen here. https://youtu.be/1FYuiNTSiLM The robot can stand from a sitting position, wave its arm, move its mouth and has light up eyes. I used the slowest RPM gearmotor "N20 style" that I could find. Rated at 16 RPM at 12 volts no load. I am running the motor on 6 volts so 8 RPM no load.
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