Joe Groele of Allegany, N.Y., took a flash camera, added a few electronic components and turned it into a coin-tossing gadget. He converted the flash into a strobe, then he ran the electricity through a coil to create a magnetic field. “The changing magnetic field causes an electric current in the coin, called an eddy current, which produces an opposite magnetic field,” says Groele. The nifty current makes the coin repel off the coil and into the air, thus tossing the coin.
The process of turning a camera into a coin flipper came with a few blips. Groele ran a few bumpy tests before a slight nudging of the coin turned into a full toss. Most notably, he discovered that working with high voltages “can be painful.” He also says he should have been “more careful drilling holes in fragile plastic.” Lastly, he found out he didn’t have to destroy nearly as many cameras as he expected. But after numerous trials, he hit pay dirt: a contraption that routinely flips a coin.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.