rgPaiva:
retrolefty:
Well the picture doesn't tell us if you correctly identified the pot's wiper terminal to wire to the analog input pin. You should take a multimeter voltage reading from ground to the input pin to see if the voltage does change from 0 to +5vdc as you move the pot's know through its range. Also 110K ohm pot is awful large value, analog input pins work best with 10k ohm or less of source impedance.Lefty
I correctly identified the pot's outputs, because i tested it on the arduino uno today , and it worked perfectly, the same code, all works fine with uno but not with this mega 2560.
I can only tell you how I would approch troubleshooting this symptom. I would first take a meter and measure the actual voltage applied to the pin and see if it tracks with turning of the pot. That would give me a good indication to next look at wiring or the sketch code. If you don't own a meter you should get one soon, as anyone building even simple projects using an arduino should.
Lefty