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General Discussion

gcomeau

(5,764 posts)

1. While it's a neat light...

Reply to HiPointDem (Original post)

Tue Dec 18, 2012, 02:43 AM

Dec 2012

...it does *not* run off gravity any more than a wind up watch runs off the spring. They both run off muscle power. In the case of the watch the energy a person uses to wind the spring... in the case of the light the energy the person uses to lift the rocks. It's not a new concept.

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Highlight:

Duo create Lamp that runs off of gravity [View all] HiPointDem Dec 2012 OP

While it's a neat light... gcomeau Dec 2012 #1

so could you skip the hanging the rocks step and just wind it up or something? HiPointDem Dec 2012 #4

Yep jberryhill Dec 2012 #7

i think a crank would be better than rocks. who wants to study under a bag of rocks? HiPointDem Dec 2012 #8

Actually a you could attach a coil, and use that as a cell for the crank. Sirveri Dec 2012 #15

For that matter... jberryhill Dec 2012 #18

You're absolutely correct Brother Buzz Dec 2012 #5

That's fantastic! WastedSaint Dec 2012 #2

Should market this using a Tom's shoes/hipster desire to use inconvenient things strategy Exultant Democracy Dec 2012 #3

That's a good idea. HappyMe Dec 2012 #12

K&R. Very cool. n/t Egalitarian Thug Dec 2012 #6

Very interesting idea! Phentex Dec 2012 #9

It sounds like the ubiquitous $12 crank dynamo powered emergency flashlights. eShirl Dec 2012 #10

is it another one of those perpetual motion machines srican69 Dec 2012 #11

crank lights are all over Africa already JCMach1 Dec 2012 #13

The minor advantage here being no battery jberryhill Dec 2012 #14

It's the same concept as an old fashioned grandfather clock. Sirveri Dec 2012 #16

It more runs on human muscle power, but very cool item. Thanks cthulu2016 Dec 2012 #17