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First, watch the video! https://www.youtube.com/watch?v=QymeqrlsQgI
MT-20 is an animated MakerTron Robot controlled by an Arduino and actuated via 5 servos. If you don't have those items, do not worry! you can still build it, it's an hybrid robot. You simply have to print "MT20_Servo.stl" 5 times to replace the real servos.
None of the pieces require support, except "MT20_Torso.obj" which only requires a few, and are easily detachable.
It uses Snap-fit ball joints for articulations of legs, arms, hands, and feet.
Head and limbs are designed around the most common micro servo, available here : 5 Mini SG90 Micro 9g Servos
I'm using this Arduino board : Arduino Starter Kit
You can get my Arduino code to control the Servos here : https://github.com/jrbedard/MT20-Robot It includes animations such as wave, walk, run, etc. You can of course create your own!