New lamp taps old power source: gravity
One of the award-winners from the recent Greener Gadgets Conference in NYC is an innovative LED lamp powered by gravity.
Solar and wind power have one serious disadvantage: neither can be relied upon 24/7, so you need either battery storage or backup power. Gravity, however, is always with us (at least until the Rapture.)
The lamp, dubbed the Gravis, was designed by Virginia Tech student Clay Moulton, and is surprisingly simple in concept. It contains a weight which is raised to the top of the lamp every day. The weight then slowly lowers itself throughout the day, generating enough power to illuminate the LEDs. Grid-free and entirely portable, with no cords to trip over, the Gravia is ideal for camping trips or post-apocalytic lifestyles .
Now if someone can just figure out how to make it work in space...
via [sawf]
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