DS18B20 vs TMP36

Using Arduino General Electronics
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Hello

What is the difference between those two temps and which one is better to use normally?

Thanks

  • DellBell
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See attached..

sf-DS18B20.pdf (256 KB)

TMP35_36_37.pdf (335 KB)

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DellBell:
What is the difference between those two temps and which one is better to use normally?

The DS18B20 is a digital temperature sensor using the Dallas 1-wire protocol. To use it, you have to include the 1-wire library:

http://playground.arduino.cc/Learning/OneWire#.UyyjS_k8Cao

The TMP36 is just an analog output temperature sensor. You connect it to your analog input pin and scale the voltage to a temperature.

Which is better? I don't know. I like the digital one better because you don't have to deal with inaccuracy in the analog line. But I'm not sure how inaccurate that is typically.

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The analog sensor needs (constant) calibration, esp when power supply fluctuates.
The digital sensor is more stable.

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The other thing I like about the DS18B20 is that it uses a bus, so the three sensors I have, only use one input.

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