http://www.jimonlight.com/2009/09/04/a-rotating-autostereoscopic-display/ I believe that a simlar system could be used to project a small 3D image from a LED dot matrix display driven by a microcontroller. The required processing power would be in range for a PIC to keep up. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist