Arduino Uno - R3

The Arduino Uno R3 is the most widely used Arduino board, perfect for beginners and experienced makers alike. Built around the ATmega328P microcontroller with an ATmega16U2 for USB communication, it provides faster transfer rates and the ability to appear as a keyboard, mouse, or other HID device.

The R3 revision adds dedicated SDA/SCL pins and an IOREF pin for shield voltage compatibility. Works with all existing Arduino shields while supporting future designs.

Key Features

• ATmega328P Microcontroller – 16 MHz clock speed
• 14 Digital I/O Pins – 6 with PWM output
• 6 Analog Inputs – 10-bit resolution
• 32KB Flash Memory – For your sketches
• USB-B Connector – Programming and power
• ATmega16U2 USB Chip – HID device capability
• IOREF Pin – Shield voltage compatibility

Specifications

• Microcontroller: ATmega328P
• Operating Voltage: 5V
• Input Voltage: 7-12V (recommended)
• Digital I/O: 14 pins (6 PWM)
• Analog Input: 6 pins
• Flash Memory: 32KB
• SRAM: 2KB
• EEPROM: 1KB
• Clock Speed: 16 MHz

Ideal For

• Learning electronics and programming
• Prototyping projects
• Interactive installations
• Physical computing experiments

Package Contents

• 1× Arduino Uno R3

Resources

• Arduino IDE Download
• Official Product Page
• Schematic (PDF)