The tutorial I studied online is using TMP36 as an example to build up a temperature sensitive product. The sensor I picked up from IDeAte lad is TMP37. Though there is only a tiny difference in their names, it greatly changed the equation part in the code in which I need to transfer the number sensor reads to voltage and finally to temperature in Celsius. The fact is that TMP36 have an output scale factor of 10 mV/°C and TMP37 provides an output scale factor of 20 mV/°C.
Detailed difference can be found here:
http://www.analog.com/media/en/technical-documentation/data-sheets/TMP35_36_37.pdf
2. Understand how temperature sensor works
The sensor's working base is the voltage that's read across the diode. The temperature rises when the voltage increases.
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