NOTES: As long as your UNO LED is flashing at a steady rate (fast or slow, doesn't matter) the UNO is ready to accept the programmer sketch

Remove any SD cards from the board BEFORE flashing the bootloader. The pins are shared with the programming header.

UNO Bootloader Kit: https://www.th3dstudio.com/product/ar...
Software download: https://bootloader.th3dstudio.com/

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