> For current, add a small dropping resistor as a current-sense
> resistor (do
> this after the voltage divider), and then amplify that with
> an op-amp, then
> send that to another ADC channel.  Power (should be minimal)
> for the op-amp
> can be compensated for in code if you wish.
>
> Cheers,
> -Neil.
>
Additionally, for current, it would be recommended to put the dropping
resistor (i.e. sense resistor) in series with the negative return path to
the power supply and ground, this way, the voltage drop across the resistor
is referenced to ground.

Rgs
Ian.

>
>
> On Wednesday 24 March 2004 04:45 pm, Rfiles scribbled:
> > Hi all,
> >
> > I was wondering whats the best way to measure the current
> and voltage of na
> > circuit the simple way possible, without any specialized
> chip, for example
> > using a pic and his ADC. I did a search on google but no
> usefull thing was
> > found.
> >
> >
> > Regards,
> > Ricardo Reis
>
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