ADC Differenzeingang

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hallo alle.
ich bin neu im forum und habe als kleines kind mal mit bascom die avrs programmiert. :)
nun bin ich über arduino gestolpert und habe gleich ein projekt für mich gefunden um das system mal auszuprobieren.
nun würde ich gerne die differenz adcs mit 20 facher verstärkung nutzen, leider kann ich
keine informationen finden wie die ports in arduino benutzt werden.
also falls einer ein code beispiel für mich hat wäre ich echt dankbar.
angeschlossen wird ein o2 sensor mit einer ausgangs spannung von ca. 10 - 50 mv.

gruß
claus

ich verstehe nicht:
quote
nun würde ich gerne die differenz adcs mit 20 facher verstärkung nutzen

was meinst du? die adc das controllers oder einen externen adc-wandler?

grüße uwe


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