We are using Arduino microcontrollers: ATmega328P and ATmega16U2 to control the Max306EUI 16-channel MUX, we have built the PCB board. But the board doesn't work after flashing the firmware. I think it is the schematic problem, does anyone have service to help customer to build the UNO R3 applicati…

UNO R3 application board

sterretje April 5, 2024, 6:38pm 6

You need to flash the 16U2 firmware as well as the 328P bootloader. Did you?

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