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Old 12-11-2012, 10:45 AM   #1
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Gravity powered LED. What a neat idea!

http://player.vimeo.com/video/53588182
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Old 12-11-2012, 12:15 PM   #2
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Re: Gravity powered LED. What a neat idea!

Wonder why they didn't just use a wind up spring? Spring cost?
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Old 12-11-2012, 01:05 PM   #3
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Re: Gravity powered LED. What a neat idea!

Beside the cost I'm betting you could pull that weighted bag up faster than winding a spring.
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Old 12-11-2012, 01:41 PM   #4
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Re: Gravity powered LED. What a neat idea!

Gravity is simpler (no spring, no ratchet winder), cheaper and more reliable. And you can adjust the weight to adjust the brightness and duration of the light.

As a retired engineer I have to say the idea is simply brilliant!

It could be scaled up to generate more power. I'd like one to power lights and TV.

Mike
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Old 12-11-2012, 02:50 PM   #5
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Re: Gravity powered LED. What a neat idea!

Probably so___springs and wind up gens aren't too reliable. I was thinking of incorporating some kind of joule robber type circuit like I posted about here
I'll bet in part that is how it works. I do understand about keeping cost down but just wonder how long that thing will last. Interesting though.
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Old 12-11-2012, 05:17 PM   #6
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Re: Gravity powered LED. What a neat idea!

Quote:
Originally Posted by Ford_6L_E350
...It could be scaled up to generate more power. I'd like one to power lights and TV.

Mike
How about a hammock chair suspended from your PH ceiling? You would use your own body as the counterweight to provide power.


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Old 12-11-2012, 05:23 PM   #7
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Re: Gravity powered LED. What a neat idea!

Quote:
Originally Posted by BroncoHauler
Quote:
Originally Posted by Ford_6L_E350
...It could be scaled up to generate more power. I'd like one to power lights and TV.

Mike
How about a hammock chair suspended from your PH ceiling? You would use your own body as the counterweight to provide power.


Herb
If that's the case I could put out a couple mega watts
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