Hi everyone, I am posting on behalf of a young friend who needs urgent help. I am not known to this, but any help is appreciated.
So my friend was making a small project 3D printer using Arduino (Mega). He is using an external power supply (12V SMPS) for powering the circuit. When he tested the printer's motor, by connecting it through the USB port and commanding through his laptop, everything was fine.
However, the moment he tries to test run the DVD drives with 2 stepper motors, the board gets hot beyond touch and smells burnt for some reason. This is not all; the moment he connects the board to the laptop, it force shuts down.
I am not that good with technical stuff but I think there's some kind of excess current through the board that is heating it up and causing the laptop to protect itself by abruptly shutting down.
I am sharing the YouTube link to the video he has been using as his guide below.
Any idea on what this issue is and how can it be resolved?