Tactile Trackball
The ball is 3 cm in diameter, held either magnetically so all but a small polar area is exposed. In addition to rotating smoothly, the ball registers (but does not yield to) pressure; "clicking" is emulated by squeezing or pinching the ball with some combination of fingers. An LED blinks or a sound is played to indicate a click is registered.
An internal gyroscope allows smooth scrolling by flicking the ball in any direction. The gyroscope restricts the rotation of the ball to that axis until deactivated by another tactile signal.
With a suction cup or other attachment on the …
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