Polargraph

« A polargraph is what I decided to call this drawing machine that I made, but it also describes the output. The machine is a simple device, that draws picture using a normal pen, some motors and some string. It is only just good enough to get the job done, and in keeping with this technical brevity, I’m going to spare you more explanations about how it works: The pictures tell the story better. »

http://www.polargraph.co.uk/