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Arduino Uno R3

What is Arduino Uno R3?

The Arduino Uno R3 is open-source integration (microcontroller) that reflects the Atmega328 chip module. This mechanism further unites 14 digital (input/output) pins, a B-type USB port for connection, 6 analog input pins, an Onboard ceramic resonator (16 MHz), an ICSP header, a DC power jack, as well as a microcontroller reset button. 

You need an Integrated Development Environment (IDE) to write programs on the board. The in-circuit system programming or ICSP header can be helpful for alternative programming interfaces. The Arduino boards have a massive support community that you can access through


  • Microcontroller: ATmega328P
  • Digital I/O Pins: 14
  • PWM (Pulse Width Modulation) Pins: 6
  • Analog Input Pins: 6
  • Flash Memory: 32 KB
  • SRAM: 2 KB
  • EEPROM: 1 KB
  • In-Built LED: Yes
  • Operating Voltage: 5V
  • Recommended Input Voltage: 7V to 12V
  • Input Voltage (Limit): 6V to 20V
  • DC Current (per I/O Pin): 20 mA
  • DC Current (for 3.3V Pin): 50 mA
  • Clock Speed: 16 MHz
  • Dimensions: 68.6 mm X 53.4 mm
  • Weight: 25 g


  • Additional Pins: Incorporates three new duplicate pins for expanded connectivity options.
  • IOREF Pin: A duplicate unit part of the 5V pin, enhancing compatibility.
  • I2C Pins: I2C pins are now located on the side of the board for simplified interfacing.
  • USB Chip Upgrade: Features a new USB chip (Atmega16U2 – 16K Flash) for improved performance.
  • Reset Button Accessibility: The reset button has been repositioned near the USB connector for ease of access.

Seamless Connectivity and Control: Equipped with a B-type USB port, the Arduino Uno R3 facilitates effortless connection to a computer for programming. Utilizing the Arduino Integrated Development Environment (IDE), users can easily write, compile, and upload code to the board, regardless of their level of expertise.

Reliable Performance: With 32KB of Flash memory, 2KB of SRAM, and 1KB of EEPROM, the Arduino Uno R3 ensures ample storage capacity for programs and data. Its 16 MHz clock speed delivers responsive performance for real-time applications, guaranteeing reliability and efficiency.

Versatile Power Options: Operating at 5V and accepting input voltages ranging from 7V to 12V, the Arduino Uno R3 accommodates various power sources, from USB connections to DC adapters. Its onboard voltage regulator ensures stable operation, even in the face of fluctuating input voltages.

Unleash Your Creativity: Whether you're a hobbyist, educator, or professional, the Arduino Uno R3 invites you to explore the limitless possibilities of embedded electronics. From educational STEM projects to IoT innovations, the Arduino Uno R3 serves as a catalyst for innovation and creativity.



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Arduino Uno R3

Arduino Uno R3

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