On 22/11/2010 05:19, V G wrote:
> Hi all,
>
> I want to construct a simple device for plotting discharge curves for
> batteries. I want to be able to measure voltage to the nearest
> millivolt.
>
> How would I go about doing this? Would an ADC on a PIC suffice?
You can get a quite cheap DVM with serial or USB and automatically fill=20
up excel at a desired time interval. No idea what accuracy it is, but a=20
PIC with 10bits is likely only  +/- 15mv to +/- 35mv on 10V range as the=20
ADC is going to be +/- 1 bit , approx 10mV in 10V before reference and=20
divider accuracy is considered.
--=20
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