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Hand crank

PostPosted: Mon Dec 08, 2008 5:19 pm
by adtrace
Hello, congratulations on the new marketing idea (buy one, give one). It's good, and I hope proves to be very effective.

I was familiar with this project back when it was in the brainstorming stage, and one of the biggest selling points was the hand crank for regions with no power. I had understood that this was to be built into the laptop originally, but now it appears that it is a supplemental part that needs to be ordered? Can someone clarify this?

Re: Hand crank

PostPosted: Mon Dec 08, 2008 7:39 pm
by AuntiMame
adtrace,

The hand crank proved to be unfeasible. There were prototypes created: I saw one at the OLPC offices. But you have to crank for hours to fully charge the battery!
Child: Daddy, daddy! I have homework. Will you charge my laptop for me?
Dad: groan!
:lol:

There are very low cost solar panels available. And OLPC works with large deployments to determine a good power solution.

The XO is designed to be tolerant of power fluctuations, so it could be charged using wind, water, solar, car battery, generator, etc.

Hope this helps,
AuntiMame

Re: Hand crank

PostPosted: Mon Dec 08, 2008 9:38 pm
by adtrace
Hey AM, thanks so much for the reply. I was very curious. So my new question is that when a child receives this laptop, if they're in an area where there's no power (and even in one where there is, it would be difficult to know if its stable) are they provided with the solar panel or some kind of device to help charge it? Or that's at an extra cost?

Thanks so much for the quick reply.

Re: Hand crank

PostPosted: Mon Dec 08, 2008 9:42 pm
by jakeosx
i thought there was a yo-yo like thing that someone had made? no? and there had been talk of a sewing maching set up where you pushed a pedal to make power... but as already said, these still would take some time.

Re: Hand crank

PostPosted: Tue Dec 09, 2008 3:41 am
by ektoric
There are loads of information on the wiki about alternative charging sources. http://wiki.laptop.org/go/Battery_and_power and http://wiki.laptop.org/go/Peripherals#Power to name a few

adtrace wrote:if they're in an area where there's no power (and even in one where there is, it would be difficult to know if its stable) are they provided with the solar panel or some kind of device to help charge it?


Per http://wiki.laptop.org/go/Deployment_Gu ... astructure, the choice of off-grid power source is determined by the participating governing body. They may decide that solar power is most efficient in their locale and ship the XO laptops with solar panels. Others may choose other human powered generators. Unfortunately I do not have at readily under my fingertips the wiki links that show which power units were shipped in the different pilot programs. But I do remember that some were indeed shipped with alternative power sources instead of the wall outlet plug.

Re: Hand crank

PostPosted: Tue Dec 09, 2008 5:43 pm
by AuntiMame
adtrace,
the solar panels are low cost -- but still extra $.

jakeosx,
The Yo-yo is still in development and the treadle thingy is commercially available from Freeplay.

follow the links that ektoric listed for more comprehensive info.

Aunti

Re: Hand crank

PostPosted: Thu Sep 17, 2009 1:05 am
by marryroy
Hello...
I am marry here.I read your comment regarding the hand cart,The problem that you have discussed is not understood by me.So please try to describe it little briefly.I hope that you will get nice solution of that.Thank you for sharing the comment...