Back in the fall of 1989, I was a freshman at Williams College, and one Monday night that fall there was some sort of problem with the cable TV in our dorm, so a bunch of us went next door to watch ...

[Eric Archer] constructed an analog computer to model the physics of a bouncing ball. The core is a TL074 opamp that does all the integral math. He had no trouble finding descriptions of analog ...

[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 ...

Back on Sunday, I devoted a "Football Physics" post to talking about erratic bouncing and an amazing rugby play where a ball popped up high at just the right moment. That's the sort of play that ...