PIC A/D and Voltage Divider
My software has no bugs, only undocumented features.
input of the A/D. This will, of course, limit how fast you can see
changes in the input voltage, but if you are simply measuring DC, then
that shouldn't be a problem. The capacitor will charge to the divided
voltage, and provide current while the A/D is sampling. Accuracy and
low power at the same time.
The cap will also filter out any noise that is induced into the
high-impedance voltage divider.