I have motor shield bought from ebay which is the clone for adafruit motor shield V2
It works fine until I was trying to connect power supply(12V,2.5A) to both of the motor shield and the Arduino Mega..immediately there was smoke from the sheild.
Then i try to connect the Arduino mega to PC but my PC wont recognize it. Why is it happen? Isnt the Mega can accept 12V?and why the shield blow up? I dont have any idea..