[OLPC India] [Community-news] OLPC News 2007-10-20

[Arjun Sarwal]

Hi,

In our design, we are using a dynamo taken from a Fiat car - in Mumbai these
Fiats are used as Taxis and are quite common.

Though, we have a general idea of the characteristics of the dynamo, it'd be
great if someone could help us by providing with specific and detailed
characteristics of the dynamo.

thanks,
Arjun

On 10/22/07, Sameer Verma <sverma at sfsu.edu> wrote:
>
> Arjun Sarwal wrote:
> > Hi Jaya,
> >
> > We plan to drive a dynamo (taken from an old Fiat)  through a system
> > of belts and pulleys using cows/cattle.
> >
> > Some initial pics here
> > http://dev.laptop.org/~arjs/cp1.JPG
> > <http://dev.laptop.org/%7Earjs/cp1.JPG>
> > http://dev.laptop.org/~arjs/cp2.JPG
> > <http://dev.laptop.org/%7Earjs/cp2.JPG>
> >
> > We are currently working on finalizing the mechanical and electrical
> > design aspects.
> >
> > regards,
> > Arjun
> >
>
>
> Way cool!!!
>
> This reminds me of the days (almost in a previous life) when I would go
> to my grandmother's place and run a pair of oxen to draw water using a
> persian wheel. Of course, we were no where close to doing this on a
> daily basis, but it was quite the task. Minding oxen that go around a
> circular path for hours is a bit mind-numbing. However, it produced very
> low rpm, but steady power. Do you guys know if this will be used to
> charge a bank of batteries directly, or will it be used to store energy
> and use it later.
>
> Burning biogas from cow dung will require a lot more in the way of
> infrastructure. We have had one at my grandmother's since the mid 1970s.
> We have had to change the drums several times because they rust easily.
>
> http://sameerverma.org/blog/?postid=122
>
> I suppose you could pipe the gas into a diesel generator (which are
> fairly common) with the appropriate carburettor to mix biogas and air.
>
> On a related note, I wonder if someone has looked at the Play Pump
> project where they use merry-go-rounds in school to pump water into an
> overhead tank. Kids supposedly love to go to school because they get to
> play in the morning before going to class and every spin of the
> merry-go-round pumps water!
>
> A play pump like setup could be used to charge batteries just like
> Arjun's cow power effort.
>
> http://www.pbs.org/frontlineworld/rough/2005/10/south_africa_th.html
>
> Sameer
>
> --
> Dr. Sameer Verma, Ph.D.
> Associate Professor of Information Systems
> San Francisco State University
> San Francisco CA 94132 USA
> http://verma.sfsu.edu/
> http://opensource.sfsu.edu/
> _______________________________________________
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>



-- 
Arjun Sarwal ( arjun at laptop.org )
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