Hi, Accidently, I have damaged my Arduino Nano 3.0 board by shortcutting Vin and GND pins (because of bad soldering). Now the board can only be powered by USB. As I should use an external power supply, I tried to fix the problem. According to the schematic, this board uses an UA78M05 (U3) as a vol…

Arduino Nano Voltage Regulator Problem

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