Re: [Gumstix-users] PINTO-TH ADC Issue

[itamarwe <wei...@gm...>]

Has anyone ever worked with the Overo's ADC with the Pinto expansion board?


itamarwe wrote:
> 
> Hi all,
> I am having trouble using the ADC of the Gumstix Overo with the Pinto-TH.
> I am measuring an analog output of an ultrasound sensor with one of the
> ADCs.
> Everything works fine, and I get good results when I use the Tobi board,
> but when I use
> the Pinto board, I get a minimum reading of 120mV even when I ground the
> ADC input.
> It also seems like the scale of the ADC has changed.
> 
> Has anyone ever encountered such a phenomenon?
> Might it be related to the parts that are not placed on the Pinto?
> 
> Just to be clear I would mention that I used exactly the same power source
> for both boards, with exactly the same configuration, and I tried both
> ADC4 and ADC6 that give the same results.
> 
> Thank you in advance for your help.
> 

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