I've got an A/D circuit on my 16F874.
I have a couple of OP Amps hooked to some resistors a few Pots and a
thermistor so that I get a 5X gain on the voltage. (schematic available
if needed)
I have it giving me 2.5V at room temp. But for the LIFE of me I can't
figure out how to convert the 0-1023 value into a usable temperature.
I have an Excel spreadsheet that will tell me the readout if I type in
the voltage example: 0v=0, 5V=1023, 2.5V=512, 2.813782991V=576

>From my chart that last Voltage should correspond to a reading of 68F
(20C)
Maybe it's late and it's really simple but I can't figure it out.. any
help out there?

                                Damon Hopkins