SparkFun Blackberry Trackballer Breakout

The SparkFun BlackBerry Trackballer Breakout gives you easy access to a trackball which measures up, down, left, and right movements, clicks on the board, as well as adding a bit of flair to your project with four built-in LEDs. The trackballer breakout can be hooked into an Arduino compatible device to provide you with an intuitive direction controller.As you can see (and probably gather from the name), the BlackBerry trackball is the main feature of this board. Four tiny spindles on the trackball each have small magnets on their ends that each trigger a paired SMD hall effect sensor, giving the user the ability to track up, down, left, and right movement of the trackball. Underneath the trackball, there is a small SMD momentary switch. This allows the user to trigger events or make selections with a simple ‘click’. Also underneath the trackball are four LED which include white, red, green, and blue that can light up the clear trackball any color desired by the user. Combinations of t