> What temperature sensors would you recommend for:
>
> -Fast Response Time (90% of actual temp)
> -Relatively Cheap (This is a school project, so nothing that costs
> $100)
> -EASY to program for using PIC16F877 - This is a must! Themistors
> are looking to be very difficult to program for, for a nice accuracy
> -Accuracy of sub +- 1degreeC
>
> I've also messed around with thermistors, just printing out an ADC
> value and they seem to vary the most, but they are hard to program
> for as they are non-linear, and they change over age

Use a look-up table to avoid calculations. You'll need to do at least
one very careful set of measurements to make the table

> Are there any other solutions i haven't thought of? What are your
> opinions of solution i need?

Use the PIC's WDT. Its period changes with temperature and is
pretty linear. You can improve the response time of a sensor by
fixing it to a heatsink - they work both ways. What response time
are you after ?

"EASY to program" is very subjective. Unless you find a sensor
that tells you what it knows the way you want it by 8-bit parallel
data, you'll have to do some calcs

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