the gravity powered LED lamp

Lee_Teschler — Thu, 21 Feb 2008 15:38:00 GMT

Here's an interesting idea: The slow fall of a mass spins a rotor that powers 10 high-output LEDs. A Virginia Tech student made a lamp using this concept which you can read about here:

http://www.newswise.com/articles/view/537851/?sc=swtr

It is about four feet high and apparently operates more of less the same as an hourglass. But they don't say how often you have to tip the thing over.

from the editor's desk : gadgets

the gravity powered LED lamp