NTC Voltage Divider Lookuptable
This page requires Javascript!
Either you have javascript disabled or your browser does not support it.
This page can not work with your current settings.
Given a voltage divider R1 connected to VCC and a NTC connected to ground.
Calculation is done in two steps. First you have to enter three pairs of temperature/resistance. From these, the coefficients for the Steinhart Hart formula are computed.
A fast microcontroller might calculate the temperature according to the coefficients in real time. More oftenly, you'll need only few discrete values that can be called from a lookup table more efficiently. Output is formatted like <Temp>,<Value>,<Voltage> where Temp is the temperature in degrees celsius, Value is the AD converter value and Voltage is the actual measured voltage.
Notice:
Until now, I only use NTCs from Vishay who specify the coefficients for
the Steinhart Hart equation directly. Therefore, the form for the
Vishay-
© 2007-2013 Robert Loos
All results without warranty!