hi, i accidentally fried my elegoo uno r3, i applied 12 volts between the 5v pin and gnd, when i connect it to the pc it is not detected but the on and L leds are on and the 5v pin seems to work, there is a possibility of to repair it or is it better to buy a new one?
It can be repaired, but you would probably have to replace every IC on the board. Cheaper and better to buy a new one.
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i understand, thanks for the reply, i guess that from now on i'll just use it as a source of 5 and 3.3v
If you have the socketed DIP version you can buy a bootloaded chip for $6 plus shipping
A Power Supply the Arduino is NOT! In this case not much left to damage.
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