Crayola ColorStudio HD Pen Hacking
 Rob Hemsleysent in this great hack that he did using the Crayola ColorStudio HD Pen. By swapping our the stock Microchip PIC 16F505 controller with a Attiny 44 (same pinouts) he is now able to make the $30 device operate as he would like. If you are interested in doing some hacking of your own have a look at the code which is available here. “The Crayola ColorStudio HD