Hi! I'm having trouble to read the voltage value of the potenciometer's wiper "leg". I connected it to the 5V-GND of the Arduino, and connect the wiper into A0 analog pin. At 100ohms, I should have read 2.5V, but instead, I got 0,49V! I'm using Matlab instead of IDE. I set the A0 pin in two diffe…

200ohms potenciometer as analog input, Arduino UNO

fungus November 19, 2012, 7:42pm 2

fofro:
potencmt=a.analogRead(0);

What's the value returned by analogRead(0)?

0.49 is after you've done some math on it. What's the raw, unmodified value?

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