Here an Instructable on using the iRobot Create, parts of an old injet printer, and some C/C++ programming to create a marker-wielding posterbot.

PosterBot: Make a Marker-Writing Robot out of an Old Inket printer and an iRobot Create – Link

Related:

  • The Make:: Drawbot Draws! – Link
  • Make Podcast: Weekend Projects – Making A Drawbot – Link
  • HOW TO – Make a Kid’s “Draw Bot” – Link