- I made a robot arm years ago out of Legos, servos and other miscellaneous hardware. I wrote some C code for the Arduino to program the movements of the robot arm. There was a Python program that communicated with the Arduino and sent different commands. This was done as a small experiment to teach my kids about programming and robotics. The video is here https://www.youtube.com/watch?v=NDqzGEMYmTE.