As I mentioned in earlier article, analog input once has been a little bit complicated process.
First, you needed to connect a spacial IC, Analog-to-Digital converter to your microcontroller and then start converting data to a suitable form into display.
But this is not the case anymore.
With Arduino, you can read analog input from any device with some simple commands and then show them on LCD or your computer or even your smartphone.
Here is the full article on instructables
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