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Changes for page Sensor Module

Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 57.1
edited by Heimir Thordarson
on 2026/02/09 19:52
Change comment: There is no comment for this version
To version 58.1
edited by Heimir Thordarson
on 2026/02/09 19:56
Change comment: There is no comment for this version

Summary

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Content
... ... @@ -107,7 +107,7 @@
107 107  * {{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.**//
108 108  * {{mathjax}}\(T_0\){{/mathjax}} = The test temperature at which the thermistor is 10k {{mathjax}}\(\Omega\){{/mathjax}}, which in this case is 25 degrees celsius.
109 109  * {{mathjax}}\(R_0\){{/mathjax}} = The resistance of the thermistor when it is 25 degrees celsius.
110 -* {{mathjax}}\(R_T\){{/mathjax}} = The current resistance of the thermistor.
110 +* {{mathjax}}\(R_T\){{/mathjax}} = The live resistance of the thermistor.
111 111  
112 112  === Filtering ===
113 113  
... ... @@ -168,6 +168,7 @@
168 168  [[image:Oil_Temp_schematic.png||height="271" width="632"]]
169 169  
170 170  Knowing the beta constant of the thermistor, the equation for the temperature based on the voltage measured by the ADC inside microcontroller can be derived.
171 +
171 171  (% style="font-size: 1.5em;" %)
172 172  (((
173 173  {{mathjax}}
... ... @@ -179,7 +179,7 @@
179 179  
180 180  Where:
181 181  
182 -* {{mathjax}}\(R_f\){{/mathjax}} = The upper resistor in the voltage divider which stays fixed, which in this case is 4.7k {{mathjax}}\(\Omega\){{/mathjax}}
183 +* {{mathjax}}\(R_f\){{/mathjax}} = The upper resistor in the voltage divider which stays fixed, which in this case is 1k {{mathjax}}\(\Omega\){{/mathjax}}
183 183  * {{mathjax}}\(V_{out}\){{/mathjax}} = The voltage over the thermistor, and the voltage that the microcontroller will measure.
184 184  * {{mathjax}}\(V_{in}\){{/mathjax}} = The supply voltage of the voltage divider, which in this case is a constant 3.3 {{mathjax}}\(V\){{/mathjax}}
185 185  * {{mathjax}}\(R_T\){{/mathjax}} = Resistance of the thermistor
... ... @@ -197,7 +197,7 @@
197 197  
198 198  where:
199 199  
200 -* {{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.**//
201 +* {{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 3976 //**K.**//
201 201  * {{mathjax}}\(T_0\){{/mathjax}} = The test temperature at which the thermistor is 10k {{mathjax}}\(\Omega\){{/mathjax}}, which in this case is 25 degrees celsius.
202 202  * {{mathjax}}\(R_0\){{/mathjax}} = The resistance of the thermistor when it is 25 degrees celsius.
203 -* {{mathjax}}\(R_T\){{/mathjax}} = The current resistance of the thermistor.
204 +* {{mathjax}}\(R_T\){{/mathjax}} = The live resistance of the thermistor.