Thanks a lot! I managed to find some additional 5V PSU for powering driver logic and it fixed the problem. But I still fail to see why is problematic to use the Arduino's 5V output in first place..
Thanks a lot! I managed to find some additional 5V PSU for powering driver logic and it fixed the problem. But I still fail to see why is problematic to use the Arduino's 5V output in first place..