I've supplied with +5V coming from arduino board. I know that the recommened suply is 12V, but it supposed that arduino can manage until 20V.
I obtain the same 4.6V if a connect the LM35. BTW A0 has 4.6V, A1 has 3.0V and A2,3,4,5... and so on have 0V in "floating connection"
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