[PD] arduino problem with analog sensors
B. Bogart
ben at ekran.org
Thu Nov 12 18:25:23 CET 2009
Try grounding all the unused analog ins(especially a few between the two
ins that are cross-talking), ideally shielding the wires would help too.
Indeed magnetic fields in those wires do move through space!
.b.
altern wrote:
> hi
>
> not a PD question I guess... i dont know much of electrical stuff. i am
> connecting two analog sensors to the arduino. One is a pressure sensor
> and the second a potentiometer, they are both from an old icube.
>
> i noticed that when i raise the potentiometer (analog pin 5) the
> pressure sensor (analog pin 2) reports values ranging 0 to ~0.16
> increasing together as the potenciometer goes up. It is like some kind
> of residual noise comming from pin 5 that goes into pin 0.
>
> the power cables of both sensors go together to 5v inlet of the arduino
> and the ground cables go to ground pin, each of the data cable goes to
> its separate analog pin.
>
> I am using arduino from Pure Data extended using latest Firmata, so i am
> just filtering out any value smaller than 0.16 coming from analog pin 0.
>
> is there anything I am doing wrong? or is this normal?
>
> thanks
>
> enrike
>
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