Skip to Content

Changes for page Sensor Module

Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 57.3
edited by Heimir Thordarson
on 2026/02/09 19:55
Change comment: There is no comment for this version
To version 57.1
edited by Heimir Thordarson
on 2026/02/09 19:52
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -168,7 +168,6 @@
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 -
172 172  (% style="font-size: 1.5em;" %)
173 173  (((
174 174  {{mathjax}}
... ... @@ -180,7 +180,7 @@
180 180  
181 181  Where:
182 182  
183 -* {{mathjax}}\(R_f\){{/mathjax}} = The upper resistor in the voltage divider which stays fixed, which in this case is 1k {{mathjax}}\(\Omega\){{/mathjax}}
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}}
184 184  * {{mathjax}}\(V_{out}\){{/mathjax}} = The voltage over the thermistor, and the voltage that the microcontroller will measure.
185 185  * {{mathjax}}\(V_{in}\){{/mathjax}} = The supply voltage of the voltage divider, which in this case is a constant 3.3 {{mathjax}}\(V\){{/mathjax}}
186 186  * {{mathjax}}\(R_T\){{/mathjax}} = Resistance of the thermistor
... ... @@ -198,7 +198,7 @@
198 198  
199 199  where:
200 200  
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.**//
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.**//
202 202  * {{mathjax}}\(T_0\){{/mathjax}} = The test temperature at which the thermistor is 10k {{mathjax}}\(\Omega\){{/mathjax}}, which in this case is 25 degrees celsius.
203 203  * {{mathjax}}\(R_0\){{/mathjax}} = The resistance of the thermistor when it is 25 degrees celsius.
204 -* {{mathjax}}\(R_T\){{/mathjax}} = The live resistance of the thermistor.
203 +* {{mathjax}}\(R_T\){{/mathjax}} = The current resistance of the thermistor.