Hello,
Im using the SEN0017 with an arduino mega 2560 but whenever I connect the sensor to the arduino it only shows 0 on screen, even when seeing a black surface.
Any help would be much appreciated.
The line tracking sensor SEN0017 (I guess that's what you're using) doesn't have a screen, so you probably use a PC and some connection to the Arduino with a program on it. That's enough of guessing, show us your code, without you won't get much help.