(Phys.org) —Valve engineer Ben Krasnow is clearly one of those guys that sees things differently than the rest of us. How many people would look at an optical trackball, for example, and think to themself, hey, maybe I could make that work with my tongue. But that's just what he's done, taken the guts from an optical trackball, add a cable, changed out the bulb and attached it all to an orthodontic type retainer which he puts in his mouth to use as a controller that can be run by his tongue. And that's just one device—he's also created another gadget that a person sits on to control some of the action on a computer screen.
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