> It is likely that you'll have to "massage" your input signal to comply
> with the requirements of the A/D input pin: scale down the voltage,
> and possibly use an OPAMP to increase impedance (see a previous
> discussion about this on this same list). What is more relevant is the
> frequency of your signal: if it is too high, the A/D converter will be
> too slow to convert it. With the AC transformer I assume you're
> measuring a 50 Hz signal, which should be no problem for any PICmicro
> with A/D converter.
> 
> Displaying the result on an LCD is a different story, but at 50 Hz
> should certainly be possible. Most graphical LCD don't have a fixed
> response time, so they might "hang" for a while occasionally as you
> write to them. An interrupt buffering the A/D conversions is a
> solution there.

Hi,
I can use a pc to display the results, with uart or usb to transfer the 
samples. But do I need to think about any other problems. For
example, what about eliminating noise, and also what is the best
sampling period, since I can choose the a/d sampling time. I.e.
if I choose a long sampling period will I be more exposed to the
noise problem. Should I use an RC circuit to filter out noises?
Tia

> 
> Greetings,
> Maarten Hofman.
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