Crist=F3v=E3o Dalla Costa wrote:

> Yes, a problem with the PIC's hardware. Maybe it's just the
> particular PIC I'm using. But I don't think that it's a problem with
> my hardware since I plugged in a 16 bit AD from Analog Devices and it
> has just about 1 lsb noise, and the PIC's 10 bit AD has at least two.


I have used a 16F88 on a solderless breadboard to measure and log temps =

from an LM34.  I didn't sleep during the conversion and I still had no =

trouble obtaining consistant 10 bit readings.  I used an external Vref =

that was simply a variable resistor and a filter cap.  1.024V well =

outside the minimum allowed by the datasheet ;-), but hey I wanted .1 =

degree resolution so I needed 1mV resolution in the ADC.  Seemed to work =

just fine.

I don't think you should see that kind of noise in your readings, unless =

you have it in your power supply as well. =


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