If you’ve ever sat through a power outage watching your phone battery tick down — or worse, found yourself off the grid with no way to call for help — then you already know how clutch a backup power ...

Everyone loves to play with electricity and plasma, and [Hyperspace Pirate] is no exception. Inspired by a couple of 40×20 N52 neodymium magnets he had kicking around, he decided to put together a ...

A hand-operated electrical generator, type GN-35, for a type SCR-131 radio. Rectangular metal case, olive drab color. Comes with two crank handles and a stand. Metal tag reads: "Signal Corps U.S. Army ...