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wrong temperature value with 100k NTC #2500
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Physical down & up values might be off? This is c/p from the sensor code
where ADC reading of 433 aka 0.42V results in your number. you can see the result when chancing the Down or Up resistances (in ohm) |
This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions. |
^ see the godbolt link above with the code reproducing the values from the sensor, and how things change depending on the rdown value (constants at the top) |
No, the R down can't be 100K because in that way the divided voltage would be higher than 1V which ADC can measure. |
What voltage are you seeing right now, with 10k and with 100k? |
Hello,
I use 100k NTC and a downstream resistor of 10K ohm, to read the LED board temperature, my configs and parameters are as below:
but what I read in 25C room temperature is about 80 Celsius, what is the problem?
here is the NTC that I use:
here is my circuit:
and what I read in room temp:
other configs:
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