Dear support team.
I bought an arduino nano, i've installed drivers and software IDE and Works fine. Using the function analogRead(x) on any analog ports i get a value int equal to 300 (or nearby), but without to connect it any sensor or voltaje input. (input=0v).
This is a hardware problem??? I must to buy another. All analog input ports (A0,A1, etc.) Works at same.
P.D. When i put a 5v signal in analog port input...function analogRead(x) returns 1024 value int, but if i reduce to 4 volts, 3v or 2v it returns almost 0 value int...never i get intermediate values.
Thanks for any information.