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How to interface USB to custom Arduino Uno Schematic and programming atmega? - Arduino Stack Exchange
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Problem uploading to standalone ATMega328P by serial/usb - Avrdude, stk500, Bootloader issues - Arduino Forum
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Amazon.com: 2PCS Dorhea for Nano V3.0 ATMEGA328P Module CH340C Chip 5V 16MHz Mini USB Micro-Controller Board with USB Cable : Electronics
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