--- In "kvnherrera" <> wrote:
>
> I finally found the answer!!!
>
> The designers didn't include the ADC documentation on the manual, and
> that was the real problem. The deal is that in 0-5 V range you don't read
> from 0-4095 (like you would expect, or at least like I would).
>
> The thing is that 0 = 2048 but it's not wrong!, because the scale it's
> split, so 0 end's in the middle (next to 4095), like in 3.5V; add noise and
> lack of experience in this kind of hardware and you get lot of pain...
Hi Kevin --
Sorry, I didn't notice that was your problem the first time. The ADC returning
signed values has confused a few people on this list. More background and and
links to past threads are here:
http://tech.groups.yahoo.com/group/ts-7000/message/11067
regards, ........ Charlie
>
>
> I really hope that this help's someone else.
>
> Kevin H.
>
>
>
>
>
>
> --- In Matthew Harrell <lists-keyword-yahoo.fd265e@>
> wrote:
> >
> > > I think that maybe you're right,the only thing is that I keep reading
> > > weird
> > > numbers, for example if I connect it to 0V I read a 2095. Do I need to
> > > wire
> > > something in order to read 0 with 0V, or why am I getting this behavior?
> >
> > I do usually read noise on the line even when nothing is there. It's a
> > relatively steady number but mine tends to be about 1000. You can
> > experiment
> > with the voltage range values and other settings to adjust that but I did
> > always notice some noise. If you're not doing it already then maybe you
> > should try using it in differential mode so you're measing the difference
> > between the signal lines and not just the total signal
> >
> > --
> > Matthew Harrell
> > Bit Twiddlers, Inc.
> > mharrell@
> >
>
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