So the whole idea is to power a LED while walking?

Why does your client need a battery only?

How does your client define battery? What chemistry? What voltage?

When you say you are able to generate 3mJ per 10 steps - How? Piezo, static=
=20
charges? How much current/voltage per pulse/step?

First you said 40mJ, then 100mJ and now 60mJ. Which one is it?

Is there any reason why the battery can't store more than xxmJ?

There are still too many unknown parameters here to get you an answer that =
may=20
be of use to you.

/Ruben


> I am harvesting energy while walking. i am able to generate 3mJ (m stands
> for milli) per 10 steps.
> so in 200 steps i can generate 60mJ. i need to store this energy. If i am
> using an ordinary battery of 50mAh and 1.2V battery, 60mJ wont give me
> enough voltage for power an LED. So i need a battery to store the energy =
and
> power an LED for 1-2 seconds. I know i can use a capacitor, but
> my client need a battery only.
>=20
> *Sarin Sukumar A*
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> *Design Engineer*
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> *ni Logic Pvt Ltd, Pune*
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> *** +91 9372195481*
> My profiles: [image:
> Google]<http://www.google.co.in/search?q=3Dsarin+sukumar&ie=3Dutf-8&oe=3D=
utf-8&aq=3Dt&
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kit2-
> clone.html>
> Contact me: [image: Google Talk/] sarinsukumar [image: Skype/] sarinsukum=
ar
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> On Wed, Oct 20, 2010 at 8:07 AM, Olin Lathrop
> <olin_piclist@embedinc.com>wrote:
>=20
> > Ruben J=F6nsson wrote:
> > > A 2000uF capacitor charged to 10V.
> >
> > Yes, but you have to drain it to zero to get the whole 100mJ out.  In
> > practise you'll need a bigger cap or higher voltage.
> >
> >
> > ********************************************************************
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Ruben J=F6nsson
AB Liros Electronic
Box 9124, 200 39 Malm=F6, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
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