Some devices are elaborately made to appear as if they operate on Faraday’s Law, when in fact the components have as much functionality as a pet rock All the rage a few years back, shake-to-charge ...

I was looking at one of these:<BR>http://www.thinkgeek.com/gadgets/lights/5a9f/<BR><BR>As a gift or the larger hand crank one.<BR>http://www.thinkgeek.com/gadgets ...

Hold the flashlight horizontally and shake it so the magnet moves through the coil. Shine the light at the audience. Original construction: purchased. The flashlight has had its capacitor and on/off ...

We may earn a commission when you click links to retailers and purchase goods. More info. I’m not sure that I can even count all of the flashlight apps in the market these days (nor would I want to ...

As Y2K approached and the world waited for blackouts that never came, human-powered electric gadgets saw a surge of popularity. These radios, flashlights and other devices don't need batteries -- they ...

Readers offer their best tips for using their smartphone as a flashlight, reading their favorite blogs, and mounting their phone on the dash of a rental car. Every day we receive boatloads of great ...

In the very late 1990s, something amazing was invented. White LEDs. These magical pieces of semiconductors first became commercially available in 1996, and by the early 2000s, you could buy a single ...

Flashlight apps are a dying breed. Google began adding them to Android as early as Lollipop, and OEMs have included them on their OEM skins for far longer. The need for this dwindles as the market ...