> Problem is that the sense pin (AN2, porta.2) is registering nearly
> the full AVdd when no panel is connected and then around 2-3V
> when the panel is connected  .  Is this typical for a PIC uC?

Hi Shawn, I don't think you can read anything into the pin appearing
to be at AVdd, as it's a floating input with nothing connected. If you
look at the Analogue Input Model in any PIC manual you'll see there's
nothing to commit the pin either way. Possibly this AVdd reading is
leakage current through an internal diode, induction from nearby power
tracks, or noise from the circuit. The only important thing is that the
ADC gives good results with the source connected. Presumably the
2-3V is the mid-position output, like so many sensors

What's the output impedance of the screen ? Sounds like it's going
to be fairly high, so you'll probably have to buffer it with an op amp
for the PIC, unless it has one built in ?

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