New answers tagged analogread
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Arduino Uno, does a lower Aref voltage work well for measuring current? without increasing ADC integral non-linearity
If you used the 3.3 volt pin as external AREF a 1.5Ω resistor would drop 3V @ 2 Amps, 3V would produce an ADC value of 930 or 2.15mA per ADC count.
If you use the 1.1V internal AREF, a 0.5Ω resistor ...
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