>I am working on a "car monitor" that's going to be used to monitor several
>parameters of an automobile, log and control a few things, using an LCD and
>sound alarms. I am using a MAX186 and an 'F84.
>But I stumbled on a little problem. The temperature of the coolant is
>measured by the car's computer with a thermistor, and I'd like to use it for
>the same purpose, but how or where can I get the response curve for it to
>convert to temperature?
>I know I can take it and place it in ice water, then in boiling water, etc.
>but I would like something more accurate.

I worked on a very similar project, and in the end I made my own
calibration curve. I found that (1) auto manufacturers aren't very helpful
in supplying such information, (2) there is quite a lot of process
variation between components, and (3) it wasn't hard to make my own curve.
My multimeter can take temperature measurements from a thermocouple
attachment, so I was the thermistor and thermocouple in some ice water in a
pot on the stove, and slowly heated the water to boiling, taking
temperature and resistance measurements as I went. I also measured the
other way (hot down to cold) to average out any hysteresis factors.

Stephen.