William Krause, 17, of Pasadena, demonstrated how he and others from a nonprofit student group unlock their inner science nerd for the benefit of homeless children. He described the workings of a ...

[Brad] just acquired a 32×32 RGB LED matrix and he jumped right into the deep end with his first project. To try out his skills on the device he used an Arduino to drive a slew of pixels with bouncing ...

A Waboba is a ball that bounces on water (water bouncing ball, geddit?). That makes it kind of unusual since a simple experiment will show that many balls do not bounce on water. And that raises an ...