NTC Thermistor readout equations | adafruit | Page 1

shy basin Sep 15, 2023, 10:42 AM

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example values vs what I get:
A=-5.23, B=1.07, C=-0.01

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The temperature that currently comes out (with nothin connected to those pins) is 273.38°C and 273.06°C but it should probably be negative (273.15 is 0K)

coral pecan Sep 15, 2023, 11:43 AM

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Perhaps the equations you're using produce a result in K instead of °C?

shy basin Sep 18, 2023, 5:30 AM

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coral pecan Perhaps the equations you're using produce a result in K instead of °C?

the coefficients are already off tho

shy basin Sep 18, 2023, 10:22 AM

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found the issues... not adding 273 to the temperatures when calculating Y1 to Y3,
Resistance in Ohms parameters had only 8 bits and some minor things

#NTC Thermistor readout equations