The Doodle Bot is a very simple robotic platform for beginners, students and hobbyist.
The Chassis is a simple laser cut panel with two ball raced geared motors and a servo for raising and lowering a white board marker, jumbo chalk or crayon. Each wheel is fitted with an 8-pole magnet that is monitored by hall effect sensors to form two simple wheel encoders.
The kit includes an Arduino compatible controller with an ATmega8A processor, USB interface (CP2102) and FET, dual "H" bridge. Sample code allows the user to write simple alpha-numeric text messages.