Is this just some inaccuracy or did I do something wrong?
You should also measure the "REF" pin to see what voltage the Arduino as using to compare the 2V voltage against. My guess is the "REF" pin will read less than 5V.There may be other issues but checking the voltage reference seems like a good place to start looking for the problem.
I will be starting a project using several analog inputs, but haven't played with the boards yet.What is a good way of avoiding an unknown REF voltage? Use a regulated power supply for the board?
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