I am try to use a 100k thermistor to build a thermometer. And the curve is a relation to a LN formula.

I guess, I can still calculate each point or so and put it on an excel sheet.

The problem is that how do I corelate the A/D data from the PIC with a look-up table?

I have the thermistor connected to a 5V pwr supply and gnd. I get the changes is voltage as the temp differs.

I guess, I will feed this into A/D port of the PIC16F877 or maybe a 16F628.
How will I use the data and look-up table to do corelation?

Thanks