- Raspberry Pi
- Digital & analog sensors
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...where a bunch of geeks got together to make other people's ideas come to life.
This is a Blackberry Trackball. It has four magnetic rollers, one on each side, which are used to track the direction of the ball when paired with four SMD hall effect sensors. In addition to tracking, it can also function as a tactile push button, but a special tactile switch must be mounted underneath it. The ball is also clear so you can mount SMD LEDs under the ball to color it.
This is a great product to add to your next project if you need something like a mouse for your user interface.