Greeatings . I make my own board with mega2560 16u mcu . I use 16mhz crstal. My power suplly is 3.3v . I have now problem. I can upload program to my mega 2560 but this program dont work. I upload blink example on pin 51 but that dont work. Have anyone to know what is problem is problem power…

mega2560 problem

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