Arduino Uno - R3
63 units available with a short lead time.
The Arduino Uno R3 is the most popular Arduino board and an ideal starting point for learning electronics and programming. Built around the ATmega328 microcontroller, it offers a robust platform for prototyping, interactive projects, and connecting to sensors, actuators, and other hardware.
The R3 revision features an ATmega16U2 USB controller (replacing the earlier 8U2/FTDI), enabling faster transfer rates, more memory, and native USB device emulation — allowing the board to appear as a keyboard, mouse, joystick, or other HID device. Additional SDA/SCL pins and an IOREF pin improve shield compatibility.
Key Features
- ATmega328 Microcontroller – 32KB flash memory, 2KB SRAM, 1KB EEPROM
- 14 Digital I/O Pins – 6 of which provide PWM output
- 6 Analogue Inputs – For reading sensors and variable signals
- 16 MHz Clock Speed – Reliable performance for most projects
- ATmega16U2 USB Controller – Faster uploads and native USB HID support
- Input Voltage – 7–12V recommended (6–20V limits)
- SDA/SCL Pins – Dedicated I2C header pins alongside AREF
- IOREF Pin – Allows shields to automatically adapt to board voltage
- No Drivers Required – Plug-and-play on Linux and macOS; Windows drivers included with the Arduino IDE
Ideal For
- Beginners learning electronics and programming
- Prototyping interactive projects and IoT devices
- Robotics, home automation, and sensor-based applications
- Educational use in schools and universities
Package Contents
- 1× Arduino Uno R3
Resources
The Arduino Uno - R3 appears in the following collections:
