LightDrops
A Rain Powered Electric Umbrella
Screenshots
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Hunter's comment
LightDrops looks like an ordinary umbrella but don’t let that fool ya. There’s more than meets the eye here. As water pours over the surface, potential energy from raindrops slamming onto the conductive membrane called polyvinylidene fluoride (PDVF) transforms into electrical energy powering embedded LEDs sending your umbrella ablaze with light. The heavier the rain, the brighter the light to help you see your way.
This working principle behind this umbrella is Piezoelectric Effect i.e. Certain materials produce electric charge when mechanical stress is applied on them.
Totally an ingenious idea to use the piezoelectric effect to light the way while raining.
Link
http://www.yankodesign.com/2008/12/08/umbrella-lights-the-way/
Contributors
Hunter: @xabi
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WOW nice idea, it happened to me at night and with torrential rains. That there are places where can not seen anything with this umbrella that has light everything will be easier.
It's the first time I see one of these
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