Rain-powered LED umbrella

PhotonBoy

Flashlight Enthusiast
Joined
Mar 11, 2003
Messages
3,304
Location
Annapolis Valley, Nova Scotia, Canada http://tinyu
"Anyone who has been caught in a torrential downpour knows that rain can be pretty powerful stuff. That's why the Lightdrops umbrella prototype is so ingenious. The polyvinylidene fluoride (PVDF) umbrella features a "collective membrane" that powers its LED lights with energy from the rain."

lightdropsledumbrellafq9.jpg


http://cleantechnica.com/2008/12/16/lightdrops-umbrella-is-powered-by-rain/

This would obviously have limited use in drier climates. - PB
 

gillestugan

Enlightened
Joined
Nov 20, 2007
Messages
242
Location
Nora, Sweden
Seems very useful!
Almost as useful as those DX "solar powered flashlights" lol, who needs a flashlight in sunlight?

(Unfortunately it's only the title, as it has a small rechargable battery inside.)
 

Lynx_Arc

Flashaholic
Joined
Oct 1, 2004
Messages
11,212
Location
Tulsa,OK
I sort of find it kind of silly when the crank lights were $15 you could buy an LED light and $10 worth of batteries and not have to crank it for a long time. If you are running 5mm LEDs just buy batteries for them.
 

defloyd77

Flashlight Enthusiast
Joined
May 10, 2007
Messages
2,612
Location
Wisconsin
For some reason this makes me think of the sidewalk that's in Michael Jacksons Billie Jean music video lol. I know not much on physics, but if it works like they show it, it could lead to greater things.
 
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