Changes for page Sensor Module
Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 17.2
edited by Heimir Thordarson
on 2026/01/22 12:45
on 2026/01/22 12:45
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To version 20.1
edited by Heimir Thordarson
on 2026/01/22 13:37
on 2026/01/22 13:37
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... ... @@ -57,7 +57,7 @@ 57 57 58 58 == Typical Application == 59 59 60 -This section will cover the sensors which will be used for AR26 and how the sensor module is designed to accomodate them. 60 +This section will cover the sensors which will be used for AR26 and how the sensor module is designed to accommodate them. 61 61 62 62 === Air Temperature Sensor === 63 63 ... ... @@ -66,8 +66,26 @@ 66 66 [[image:circuit with marks.png||height="195" width="465"]] 67 67 68 68 (% class="wikigeneratedid" %) 69 -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 69 +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. 70 70 71 +{{mathjax}} 72 +(% style="font-size: 1.5em;" %) ((( {{mathjax}} 73 +$$ 74 +R_T = R_f \frac{V_{out}}{V_{in} - V_{out}} 75 +$$ 76 +{{mathjax}} ))) 77 +{{/mathjax}} 78 + 79 +(% class="wikigeneratedid" %) 80 +where: 81 + 82 +* {{mathjax}}$$R_f$${{/mathjax}} = The resistance of the upper resistor, which in this case is 4.7k Ohms 83 +* {{mathjax}}$$V_{out}$${{/mathjax}} = Voltage measured by the microcontroller 84 +* {{mathjax}}$$V_{in}$${{/mathjax}} = Supply voltage of the voltage divider, which in this case is 3.3 Volts 85 +* {{mathjax}}$$R_T$${{/mathjax}} = Resistance of the thermistor in Ohms 86 + 87 +The resistance R_T can then be put into this 88 + 71 71 === Suspension Displacement Sensor === 72 72 73 73 === Oil Temperature Sensor ===