There are plenty of hand cranked generators to be found online, from tiny devices intended to top up a single phone to sturdy metal boxes intended for battery charging. This one differs from those ...

Chain link fences are woven with a mechanism that is almost hypnotic to watch, so [Levsha] decided to build his own tiny hand-crank tabletop ... practical use for this device that we can see ...

Tullio Pellegrini. The film explains the workings of a variable shutter in motion picture cameras, detailing its design, functions, and advantages over a standard shutter. It describes how the ...