HELP with Robot Arm

Hello,

I was wondering if anyone had heard of "How to Mechatronics" and tried some of Dejan's projects.
I am trying to get the robot arm to work after assembling it and uploading the code by Dejan to a MEGA.

Here is the link to the project:

Looking for any advice or ideas, Cheers :slight_smile:

What is the problem?

Cheers,
Kari