Arduino Leonardo R3 Board


In stock

  • ATmega32u4 Microcontroller: Powers projects with ample memory and processing capability.
  • USB Connectivity: Emulates keyboards and mice for interactive applications.
  • Digital and Analog I/O: Offers 20 digital I/O and 12 analog input pins for versatile project integration.
  • Arduino IDE Compatibility: Easy programming and extensive library support.
  • Compact and Robust: Suitable for diverse electronics projects from prototyping to advanced applications.


In stock

The Arduino Leonardo R3 Board is a versatile microcontroller board based on the ATmega32u4 microcontroller. It offers a wide range of features and capabilities, making it suitable for various electronics projects, from simple prototypes to complex interactive devices. Here’s a detailed description of its features, specifications, and applications:

Key Features:

  1. ATmega32u4 Microcontroller: Powered by the ATmega32u4 microcontroller with 32KB of flash memory, 2.5KB of SRAM, and 1KB of EEPROM, providing ample space for storing code and data.
  2. USB Connectivity: Built-in USB communication allows the Leonardo to emulate a keyboard, mouse, or other USB devices, enabling seamless interaction with computers and peripherals.
  3. Digital and Analog I/O: Offers 20 digital I/O pins, including 7 PWM outputs, and 12 analog input pins, facilitating connections with various sensors, actuators, and external devices.
  4. Integrated Libraries: Compatible with the Arduino IDE, supporting a vast library of pre-written code for easy development of projects without starting from scratch.
  5. Onboard Peripherals: Includes a 16MHz crystal oscillator for precise timing, a micro USB connector for programming and power, and a reset button for restarting sketches.
  6. Direct Plug-in Capabilities: Utilizes a micro USB connector for easy programming and power supply, eliminating the need for additional programmer hardware.
  7. Versatile Applications: Suitable for a wide range of applications, including robotics, IoT devices, interactive art installations, and educational projects due to its easy programmability and extensive community support.
  8. Compact and Durable: Compact form factor for easy integration into projects, with robust build quality ensuring reliability in various operating conditions.


  • Microcontroller: ATmega32u4
  • Operating Voltage: 5V
  • Input Voltage (recommended): 7-12V
  • Digital I/O Pins: 20
  • PWM Digital I/O Pins: 7
  • Analog Input Pins: 12
  • Flash Memory: 32KB (of which 4KB used by bootloader)
  • SRAM: 2.5KB
  • Clock Speed: 16MHz
  • USB Interface: Micro USB


  • Interactive Projects: Create responsive and interactive projects using its USB communication capabilities.
  • Educational Use: Learn programming and electronics with its user-friendly Arduino IDE and extensive online resources.
  • Automation: Build automation systems and control devices with its digital and analog I/O capabilities.
  • Prototyping: Quickly prototype new ideas and concepts in electronics and IoT applications.
  • Creative Projects: Design interactive art installations and innovative gadgets leveraging its versatile features.

Why Choose the Arduino Leonardo R3 Board?

The Arduino Leonardo R3 Board stands out for its USB-based communication capabilities, which allow it to act as a human interface device (HID), making it ideal for projects requiring keyboard or mouse emulation. Its compatibility with a wide range of sensors, actuators, and peripherals, combined with its ease of use and extensive community support, makes it a top choice for hobbyists, educators, and professionals alike.

Explore the possibilities of interactive electronics with the Arduino Leonardo R3 Board and bring your creative ideas to life.

Note: Images are for illustration purposes only.

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