I was following same code and wiring as Lesto, but it act's very strangely.
First is analog input, second clock 1 (0-2.5V), third clock 2 (strange 0-(-0,4V)), fourth seems like shift gate.
Also when I partially cover the sensor reading seems to stop in like 70% of sensor then goes black.
The sensor isn't covered in two places but It shows like it is.
Also. Have anybody tried reading using Mega? I tried but failed. I even changed ports in code but it didin't helped either. Can anyone please know what's going on, if it's sensor fault?