Changes for page Sensor Module
Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 42.4
edited by Heimir Thordarson
on 2026/01/27 14:39
on 2026/01/27 14:39
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To version 42.3
edited by Heimir Thordarson
on 2026/01/27 14:36
on 2026/01/27 14:36
Change comment:
There is no comment for this version
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... ... @@ -57,7 +57,7 @@ 57 57 58 58 The air temperature sensor will be used to have a dynamic reference setpoint for the cooling system. This could reduce the current draw from the low voltage system compared to having a fixed reference point. This is because the regulator will not try to cool the water to a temperature lower than the ambient temperature. The sensor works as a resistor which varies depending on its temperature. Where in this case, the resistance lowers when the temperature increases (NTC). To make the microcontroller able to measure the changes in resistance, the thermistor is put into a voltage divider circuit. 59 59 60 -[[image:circuit with marks.png||height="2 37" width="566"]]60 +[[image:circuit with marks.png||height="218" width="520"]] 61 61 62 62 (% class="wikigeneratedid" %) 63 63 As shown in the figure above, the thermistor is put into a voltage divider circuit with a 4k7 ohm resistor to convert the resistance changes of the thermistor to a measurable voltage. To find the temperature of the thermistor based on the voltage measure by the analog-to-digital converter (ADC), the resistance of the thermistor needs to be calculated based on the voltage from a voltage divider.