Sensors don't just make vehicles more comfortable. Banner Engineering's racing Pontiac GXP.R puts a customized Banner long-range optical sensor on each corner of the car's front end to measure its downforce, the downward pressure that makes the car hug the track. The greater the downforce, the faster the car can go through curves and turns. During practice runs, the car collects a stream of data about the changing distance between the car's front end and the track. Crews then modify the car's tires and suspension to fit the track's combination of curves and straights.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
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