Discontinued.
Arduino Uno R3
Arduino UNO SMD REV3 [A000073] : Electronics
The Arduino UNO R3.0 kit Download Scientific Diagram
Arduino® UNO R4 WiFi — Arduino Official Store
Arduino UNO R3 - now showing 3 red LEDS (is this faulty?) - Hardware - Arduino Forum
Arduino Uno R3-compatible with ESP8266 and external Antenna — PMD Way
Enhanced and improved, the Arduino UNO R4 Minima is armed with a powerful 32-bit microcontroller courtesy of Renesas. Brace yourself for increased processing power, expanded memory, and a whole new level of on-board peripherals. The best part? Compatibility with existing shields and accessories remains intact, and there's no need to make any changes to the standard form factor or 5 V operating voltage.
Arduino Uno R4 Minima - ABX00080
Arduino UNO R3 USB Microcontroller – Addicore
Arduino UNO Rev3; 16MHz Clock Rate; 32KB Flash Memory; 1KB EEPROM; ATmega328P Microcontroller - Micro Center
Build an Arduino Uno R3 From Scratch Part 1
Arduino Uno - R3 SMD - DEV-11224 - SparkFun Electronics
Arduino Uno R3 - AzureFilm
Arduino Uno - R3 (original chip) - Mikroelectron MikroElectron is an online electronics store in Amman
Arduino® UNO R4 WiFi — Arduino Official Store
Uno R3 SMD with CH340 USB - ProtoSupplies
