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NTC capteurs température » History » Version 2

Frédéric Blanc, 2021-05-20 10:51

1 1 Frédéric Blanc 
h1. NTC capteurs température
2 





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https://www.giangrandi.org/electronics/ntc/ntc.shtml





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!clipboard-202105201030-v1vwo.png!





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ex R0=50K  B=3950 T0=25°C =>298.15°K





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    2
    Frédéric Blanc
    





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!clipboard-202105201046-eb06u.png!





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<pre>





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<code>





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voltageDividerR1 = 3300 //tension pont 3.3V





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BValue = 3950 //constante NTC





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R1 = 10000 //résistance pont 10K





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T1 = 298.15 // temp 25°C





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NADC= 2^N-1 //bits ADC





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R2 = (voltageDividerR1*mesure)/(NADC-mesure)





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e = 2.718281828





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a = 1/T1;





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b = log10(R1/R2)





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c = b / log10(e)





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d = c / BValue 





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T2 = 1 / (a- d)





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tempcelsius=T2 - 273.15





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</code>





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</pre>