MSOE EE2905 / Mbed 2 deprecated Audible_Thermometer

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Dependencies:   mbed

Diff: thermistor.h

Revision:
0:59f09202ccbb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thermistor.h	Thu Oct 05 20:02:27 2017 +0000
@@ -0,0 +1,16 @@
+/* thermistor.h
+
+   Contains the definition for the Fahrenheit temperature calculation
+   
+   The input is the analog reading, and the returned float value is the
+   temperature in degrees Fahrenheit.
+
+*/
+
+float temp_calc(float analog_value) {
+        double R_ratio = (1/analog_value - 1);
+        double logR_ratio=log(R_ratio);
+        double T_kelvin=1/(.003354016+.000256985*logR_ratio+.000002620131*logR_ratio*logR_ratio);
+        float T = 1.8*(T_kelvin - 273) + 32;
+        return T;
+}
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