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Are you sure? Is there any possible threat to the motor driver if I try to solder them as you told me?
I didn't fix it yet. I found out something that just made me think WTF? The motor can be controlled without power on the vcc. I just unplugged the VCC wire and ground from the arduino and the motor driver still spins the one motor. I am trying with a battery pack now. Maybe usb gives arduino enough power for everything else? I am simply amazed at the fact that I can control the driver without powering it.