PDA

View Full Version : Gravity Light -- this is cool!


N2CHX
12-20-2012, 11:58 AM
http://phys.org/news/2012-12-duo-gravitylight-lamp-gravity-video.html#ajTabs

Simple design and much like an old grandfather clock, but what a great idea!
KC2UGV
12-20-2012, 12:06 PM
I'm wondering if something like this can be made from an old grandfather clock? Wind up the light, and let it go...
n2ize
12-20-2012, 12:50 PM
Clever little idea. And it works. Of course the light from a kerosene light or candle is softer and warmer. But the LED gravity light has it's place and is safer than combustion lighting.
XE1/N5AL
12-20-2012, 01:22 PM
Neat idea. But, as far as reducing health issues, I wonder how many of these poor villagers are still going to burn wood (and other materials) to provide heat for their dwellings?
KB3ZGV
12-20-2012, 02:50 PM
I bought a flash light in Walmart that you charge the batteries with a cranked magneto. It lasted 5 years and then it got smashed. It cost 4 dollars and change
KG4CGC
12-20-2012, 04:38 PM
Natural Science.
Someone go wind up the stove.
n2ize
12-21-2012, 05:57 AM
It's a clever idea and can also work with a windup mechanism. But, can anyone explain why it is not "free energy" ?
N2CHX
12-21-2012, 07:30 AM
It's a clever idea and can also work with a windup mechanism. But, can anyone explain why it is not "free energy" ?

Well technically, the person pulling the weight up expended their own energy to power it. So in reality, it's powered by last night's dinner.
KC2UGV
12-21-2012, 07:31 AM
It's a clever idea and can also work with a windup mechanism. But, can anyone explain why it is not "free energy" ?

Because you're just converting mechanical energy into electrical (And then into light). You lift the weight (Mechanical).
N2CHX
12-21-2012, 07:34 AM
Because you're just converting mechanical energy into electrical (And then into light). You lift the weight (Mechanical).

Smarty-pants. I like my answer better.
KC2UGV
12-21-2012, 07:37 AM
Smarty-pants. I like my answer better.

Didn't see yours, and I like your answer better...
N2CHX
12-21-2012, 07:44 AM
Didn't see yours, and I like your answer better...

:lol:
w0aew
12-21-2012, 08:04 AM
It's great unless you live in a gravity-free zone.
NY3V
12-21-2012, 09:12 AM
8349

Aw, why not let the rats power the lights? ;)
kb2vxa
12-21-2012, 09:11 PM
Because they were last night's dinner for the one who lifts the rocks.
n2ize
12-22-2012, 02:05 AM
It's great unless you live in a gravity-free zone.

That can be a problem.... ;)
n2ize
12-22-2012, 02:05 AM
8349

Aw, why not let the rats power the lights? ;)

That don't look like no rat to me.
KB3ZGV
12-22-2012, 02:31 AM
http://www.youtube.com/watch?v=q4P7zUFFGtQ