Original ATMEGA328P-PU DIP-28 Microcontroller IC ARDUINO UNO R3

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 - Genuine ATmega328P Microcontroller, Digital/Analog I/O Pins

Arduino UNO R3 (compatible) Atmega328P with CH340 USB

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

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

Atmega328 Programmer Shield for Arduino UNO - DIY Kit