What you are doing could be considered a software low pass filter.
There are a great many ways to implement one, though, so you need to
more carefully define what you are trying to accomplish.

We have talked about this on the list before, try looking for other terms:
digital filter
average
averaging
sensor filter
smoothing

-Adam

On 6/19/07, Andre Abelian <aabelian@mason-electric.com> wrote:
> Hi to all,
>
> I am using external 13 bit ADC witch originally won't necessary
> to go that high resolution "not under my control" now the result
> I am getting is noisy numbers are going high and low. what I did is
> reading it 10 times then I add them together then divide it by 10.
> It helps but one of our engineer asked me to add software low pass
> filter witch I am familiar with it. Reading 10 times values are up to 15 point
> different.
> My question is do you have any experience or know how software LPF work?
> any link or info will appreciate. I searched piclist.com not enough info
> I found to understand what to do.
>
> thank you for your help
>
> Andre
>
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