avrdude stk500_getsync(): not in sync resp=0x30 error for Arduino Uno?/ Computer doesn't read Arduino Uno R3 anymore? Answered
My Arduino used to work well till yesterday until I had made a mistake. I accidentally connected a 12v supply into the "5v" female header pin on the board instead of "Vin" and at the same time I had it connected to my computer usb. While uploading a sketch, I realized what mistake I had done in the wiring and pulled out the usb and disconnected the 12v supply. Since then my computer does not even read my Arduino anymore. However power LED and built in orange LED on pin 13 still turns on when I connect Arduino to my computer now.
Can any body help me?? I know I was too careless, but please help me with some solution.