Arduino Compatible UNO R3 PLUS Sensor I/O Shield Atmega328P 16U2 Expansion Board

Arduino MEGA 2560 R3 (compatible) with ATmega16u2 USB UART

UNO R3 PLUS Sensor I/O Shield Atmega328P 16U2 Expansion Board for Arduino

2 x Atmega328P-PU Arduino Bootloader installed (for UNO R3)

For Arduino UNO R3 Shield Board Prototype PCB Atmega328P 2.54mm Pitch Breadboard

Arduino UNO R3 (compatible) Atmega328P with CH340 USB

Pro Mini Enhancement ATMEGA328P 16MHz 5V Compatible Arduino PRO Module

1-10x Mega2560 R3 ATMEGA2560 CH340 Atmega2560-16AU Development Board For Arduino