Skip to Content

Changes for page Sensor Module

Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 35.6
edited by Heimir Thordarson
on 2026/01/26 16:59
Change comment: There is no comment for this version
To version 37.1
edited by Heimir Thordarson
on 2026/01/26 17:19
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -80,7 +80,20 @@
80 80  Where:
81 81  
82 82  * {{mathjax}}\(R_f\){{/mathjax}} = The upper resistor in the voltage divider which stays fixed, which in this case is 4.7k {{mathjax}}\(\Omega\){{/mathjax}}
83 -* {{mathjax}}\(V_{out}\){{/mathjax}} =
83 +* {{mathjax}}\(V_{out}\){{/mathjax}} = The voltage over the thermistor, and the voltage that the microcontroller will measure.
84 +* {{mathjax}}\(V_{in}\){{/mathjax}} = The supply voltage of the voltage divider, which in this case is a constant 3.3 {{mathjax}}\(V\){{/mathjax}}
85 +* {{mathjax}}\(R_T\){{/mathjax}} = Resistance of the thermistor
84 84  
85 -(% class="wikigeneratedid" %)
86 -
87 +Knowing this, the resistance of the thermistor can be added into the following equation. This will determine the temperature of the thermistor based on the known resistance and the beta value of the thermistor.
88 +
89 +(% style="font-size: 1.5em;" %)
90 +(((
91 +{{mathjax}}
92 +$$
93 +T = \frac{1}{\frac{1}{T_0} + \frac{1}{\beta} \ln\left(\frac{R_T}{R_0}\right)}
94 +$$
95 +{{/mathjax}}
96 +)))
97 +
98 +* {{mathjax}}\(\beta\){{/mathjax}} = material constant that defines the steepness of its resistance-temperature curve between two temperature points, usually 25/85 degrees celsius. In this case it is 3694 //**K**//
99 +* //{{mathjax}}\(T_0\){{/mathjax}} =//