The EasyPoint™ N35P112 is a hall-effect based miniature joystick module. The integrated two-dimensional linear encoder monitors the movement of the magnet incorporated in the knob and provides the x and y coordinates via I²C output. A mechanical push button built in to the module even provides a “select” function. In other words: It's a really cool little joystick! Project description, more information and ordering can be found at https://www.sparkfun.com/products/10835 Datasheet: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/BreakoutBoards/N35P112_Datasheet_v1_1.pdf Example Code: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/BreakoutBoards/EasyPoint_Demo.ino Product Video: http://youtu.be/3Kg6MP163dQ?t=4m59s