harvesting energy

2011-10-27 Thread Kristen Eisenberg
If we're talking about kids powering their own devices, I think the way to go is to turn work into play. The merry go round/hard bar swing would fit in this category. So basically, let's look at activities where energy exerted is ambient anyway? What I mean is that the energy is being used up by

Re: harvesting energy

2011-10-27 Thread Tony Anderson
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Re: harvesting energy

2011-10-27 Thread Chris Leonard
On Thu, Oct 27, 2011 at 2:14 PM, Tony Anderson tony_ander...@usa.netwrote: Has anyone estimated the work required to charge an XO? Mike Lee gave a demo some time back at the Washington D.C. Learner's Club which seemed to show that it would be a difficult workload for an adult athlete to charge

Re: harvesting energy

2011-10-27 Thread Ed McNierney
there? FYI, this is exactly the concept behind PlayPumps for water pumping. http://www.playpumps.co.za/ cjl -- next part -- An HTML attachment was scrubbed... URL:http://lists.laptop.org/pipermail/devel/attachments/20111027/8c1f838a/attachment-0001.html

Re: harvesting energy

2011-10-27 Thread DJ Delorie
Due to our battery-management system, it is impossible to charge an XO laptop in less than about 110 minutes. Are humans better at shorter bursts of higher power? Perhaps a human-powered charging system would benefit from some intermediary storage, either electrical or mechanical - supercaps,

Re: harvesting energy

2011-10-27 Thread Paul Fox
alan jhonn aguiar schwyn wrote: I think that not is for an adult athlete... In Uruguay, in a site that not have electricity.. The childrens use this dispositive.. And not need much effort than ride bikes for a while... Regards Alan bear in mind that the *minimum* time it takes

Re: harvesting energy

2011-10-27 Thread Carlos Nazareno
Wow! De ja vu! I think I asked some of the exact same questions ages ago here and have been discussing the exact same harvesting methods with friends when hanging out:) I think the biggest problem about these are currently cost and fragility/durability. The recess/lunch/playtime thing and

Re: harvesting energy

2011-10-27 Thread Sameer Verma
On Thu, Oct 27, 2011 at 12:00 PM, Paul Fox p...@laptop.org wrote: alan jhonn aguiar schwyn wrote:       I think that not is for an adult athlete...   In Uruguay, in a site that not have electricity.. The childrens use this   dispositive..   And not need much effort than ride bikes for a

Re: [BULK] Re: harvesting energy

2011-10-27 Thread Richard A. Smith
On 10/27/2011 11:45 PM, Richard A. Smith wrote: Is the XO running or powered off? Is it for a XO-1.5 or XO-1.5? Oops. XO-1 or XO-1.5 -- Richard A. Smith rich...@laptop.org One Laptop per Child ___ Devel mailing list Devel@lists.laptop.org