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Tue Dec 18, 2012, 01:38 AM

 

Duo create Lamp that runs off of gravity



London based designers Martin Riddiford and Jim Reeves have created what they are calling the GravityLight, an LED lamp that runs off of nothing but gravity. The purpose of the lamp is to provide people in third world countries with an alternative to kerosene lamps which cause burns and lung ailments to millions of people too poor to afford any other source of light. Ads by Google Alternative Energy Films - A Series of Short Films that Will Change the Energy Conversation. - RationalMiddle.com

The lamp is as simple as it is inexpensive. A cable hangs from a gear mechanism holding onto a plastic bag filled with dirt or rocks. The energy created by gravity pulling the bag downwards is enough to power an LED bulb for up to half an hour. Riddiford and Reeves have posted their creation on the fund sourcing site indiegogo and thus far pledges have doubled the $55,000 goal.

Read more at: http://phys.org/news/2012-12-duo-gravitylight-lamp-gravity-video.html#jCp

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Arrow 18 replies Author Time Post
Reply Duo create Lamp that runs off of gravity (Original post)
HiPointDem Dec 2012 OP
gcomeau Dec 2012 #1
HiPointDem Dec 2012 #4
jberryhill Dec 2012 #7
HiPointDem Dec 2012 #8
Sirveri Dec 2012 #15
jberryhill Dec 2012 #18
Brother Buzz Dec 2012 #5
WastedSaint Dec 2012 #2
Exultant Democracy Dec 2012 #3
HappyMe Dec 2012 #12
Egalitarian Thug Dec 2012 #6
Phentex Dec 2012 #9
eShirl Dec 2012 #10
srican69 Dec 2012 #11
JCMach1 Dec 2012 #13
jberryhill Dec 2012 #14
Sirveri Dec 2012 #16
cthulu2016 Dec 2012 #17

Response to HiPointDem (Original post)

Tue Dec 18, 2012, 01:43 AM

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

...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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Response to gcomeau (Reply #1)

Tue Dec 18, 2012, 01:51 AM

4. so could you skip the hanging the rocks step and just wind it up or something?

 

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Response to HiPointDem (Reply #4)

Tue Dec 18, 2012, 03:00 AM

7. Yep

But that adds a part - ie a battery, unless you didn't want to do anything but turn the crank.

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Response to jberryhill (Reply #7)

Tue Dec 18, 2012, 03:03 AM

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

 

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Response to jberryhill (Reply #7)

Tue Dec 18, 2012, 04:04 PM

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

Store potential energy in a wound coil, as it uncoils it provides energy.

That said, the gravity drop might be simpler to produce and thus cost less, would have to see the prints to be sure.

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Response to Sirveri (Reply #15)

Tue Dec 18, 2012, 07:10 PM

18. For that matter...

You can attach a crank to a winch and lift the bag of rocks. Still, a bag of rocks is easier to replace than a piece of spring steel.

Seems like we have a few crank addicts here. Whatever turns your crank.

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Response to gcomeau (Reply #1)

Tue Dec 18, 2012, 01:51 AM

5. You're absolutely correct

But this little gizmo demonstrates wonderfully how little power the LED's actually draw. Perhaps it should be used to promote LED's.

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 01:45 AM

2. That's fantastic!

 

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 01:48 AM

3. Should market this using a Tom's shoes/hipster desire to use inconvenient things strategy

sell them for much more then they cost in the US to people who want too reduce their carbon foot print or perhaps as a way to exercise while powering your house lights for the day. Then for each unit sold in the US give a few to someone who doesn't have access to an electrical grid.

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Response to Exultant Democracy (Reply #3)

Tue Dec 18, 2012, 07:32 AM

12. That's a good idea.



Cool lamp.

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 01:53 AM

6. K&R. Very cool. n/t

 

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 07:06 AM

9. Very interesting idea!

I am always fascinated with stories like this.

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 07:22 AM

10. It sounds like the ubiquitous $12 crank dynamo powered emergency flashlights.

Kinetic energy.

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 07:30 AM

11. is it another one of those perpetual motion machines

Guess not....just an old fashioned dynamo

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 08:17 AM

13. crank lights are all over Africa already

As are solar charged lights and simple rechargeable LED bulbs.

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Response to JCMach1 (Reply #13)

Tue Dec 18, 2012, 11:23 AM

14. The minor advantage here being no battery


....which eliminates a toxic part. Slim advantage, but it is a distinguishable difference.

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 04:05 PM

16. It's the same concept as an old fashioned grandfather clock.

Those are kinda nice I guess.

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Response to HiPointDem (Original post)

Tue Dec 18, 2012, 04:40 PM

17. It more runs on human muscle power, but very cool item. Thanks

(Lifting the bag of rocks is where the energy comes from)

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