kazunori ogasawara / NTCThermistor

NTC Thermistor class.

Dependents:   FermenterTempArray

Fork of Thermistor by kazunori ogasawara

Diff: NTCThermistor.cpp

Revision:
2:b052ac698148
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NTCThermistor.cpp	Tue Sep 09 02:48:51 2014 +0000
@@ -0,0 +1,21 @@
+#include "NTCThermistor.h"
+
+/** Create a NTCThermistor instance
+*@param T0 basic temperature[degrees/celsious]
+*@param R0 basic resistance[ohm]. Thermistor takes this resistance at basic temperature T0.
+*@param B B-parameter. 
+*/
+NTCThermistor::NTCThermistor(float T0,float R0,float B){
+    T0_ = T0;
+    K0_ = T0_+273.0;
+    R0_ = R0;
+    B_ = B;
+}
+
+/** Transfer temperature from resistance 
+*/
+float NTCThermistor::trans_R2T(float R){
+    float K =  (B_*K0_)/(K0_*log(R/R0_)+B_);
+    float temp = K-273.0;
+    return temp;
+}
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