[maemo-developers] [maemo-developers] Re: Measuring power consumption of 770

[From: Igor Stoppa]

Hi,

On Tue, 2006-03-21 at 11:31 -0500, ext Larry Battraw wrote:
>   I would advocate building a dummy battery out of a piece of
> wood/plastic with a small piece of copper clad board (split into three
> pads) to act as the contacts of the battery.  You can then run wires
> from those to the real battery, passing it through whatever
> resistor/sensing equipment you want.  As soon as you try measuring
> what goes into the DC jack you're then including whatever losses
> incurred by the DC-DC conversion from 5V to whatever used internally,
> as well as issues around having it potentially trying to charge the
> battery at the same time you're measuring.  That, and Igor as much as
> said that things could behave differently based on whether it detects
> wall/DC power vs. battery power alone.  Honestly, at this point you
> probably could have built a couple rigs for measuring power from the
> battery in all the time that has been spent discussing it.  :-)
> 
> Larry
> 
> On 3/21/06, Frantisek Dufka <dufkaf at seznam.cz> wrote:
> 
> > Well I was not thinking about measuring at the mains plug. I was
> > thinking about measuring at the n770 side (5V?) because it is a bit
> > easier then opening the device and messing with battery pins.
> >
> > Frantisek
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did anybody produce anything?

I was hoping that the discussion would bring some interest to the
fabulous world of power management also amongst other developers ...

-- 
Cheers,
           Igor

Igor Stoppa (Nokia M - OSSO / Tampere)