Arduino boards are equipped with analog inputs. Using the input voltage as 5V reference, one can read the analog input of any given 0-5V voltage with an accuracy of 5V/1024 = 4.88 mV (hint: don't expect accuracy to be anywhere near that number). Arduino in fact can take a different input as its vo...By: techprolet
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from Instructables: exploring http://ift.tt/1xcHXHa
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