Source code for my IOIO Plotter. The design is a simple easel-mounted wall-style plotter. A marker is suspended by two strings, each is rolled on spool, which is driven by a stepper motor. The entire setup is controlled by an Android tablet through a IOIO board. The app in this repo allows converting photos (from the camera or gallery) into artistic vector drawings and immediately execute them on the plotter.
Read more and see the plotter in action on my blog:
http://ytai-mer.blogspot.com/2013/05/ioio-plotter-and-motor-control-library.html
http://ytai-mer.blogspot.com/2013/11/how-i-became-artist.html