Hello everyone,
I am looking for an accurate formula to use for my thermistor, but I want to avoid the Steinhart one, do you have any better formula to suggest ?
Link to the thermistor:
Thank you in advance,
Napster
I am looking for an accurate formula to use for my thermistor, but I want to avoid the Steinhart one, do you have any better formula to suggest ?
The Steinhart-Hart formula does an approximation to the third order. Is that too precise for you? Why do you want to avoid that formula? Is the calculation overhead too big?
The data sheet contains the curve of resistance versus temperature. Fit that curve with any function you like. In any case, you still have to calibrate the thermistor.
you can use multimap - Arduino Playground - MultiMap - to make a direct mapping of the analogRead values to temperature in Celsius or Fahrenheit. Whatever you like. You can use the float (my advise) or the long version .
This will match your NTC very well.
Serial with 2k7. Code shown
https://dl.dropboxusercontent.com/u/43081398/ardino-ntc-outdoor-regning.pdf