Dubbed the PropEtcher, this Etch-a-Sketch is powered by a Parallax Propeller chip and controlled with a computer. While it can’t produce any complex drawings…yet, the custom creation is still being tweaked. Video after the break.
As it happens, there is some appreciable mechanical slop, also known as backlash, in the system. At first I thought the backlash was in the tubing between the stepper motors and the Etch-a-Sketch, but in fact it’s mostly in the Etch-a-Sketch mechanism itself.