Arduino Leonardo R3 Microcontroller Board

The Arduino Leonardo R3 is a versatile microcontroller development board built around the ATmega32U4. With native USB support and a rich set of I/O, it’s ideal for engineers, makers, and students building projects with Arduino, electronics components, and modules. Turn your concepts into robust prototypes for automation, HID devices, and interactive systems.

Key Features 🌟

• ATmega32U4 Microcontroller: 32 KB flash and 2.5 KB SRAM provide ample resources for Arduino projects across a wide range of applications.
• Native USB (HID): Acts as a keyboard or mouse without extra hardware—perfect for HID projects, input devices, test fixtures, and automation.
• Flexible I/O: 20 digital I/O pins, including 7 PWM outputs and 12 analog inputs for sensors, actuators, and expansion modules.
• On-board USB connector: Simple programming and serial communication via USB for fast iteration in the Arduino IDE.
• USB cable included 🔌: Ready to connect right out of the box for quick setup and testing.
• Compact, portable form factor 📦: Ideal for embedded builds and mobile prototypes where space and weight matter.
• Open-source ecosystem 🔁: Leverage extensive libraries, examples, and community support for rapid development.

Technical Specifications 📐

• Microcontroller: ATmega32U4
• Flash Memory: 32 KB (4 KB used by bootloader)
• SRAM: 2.5 KB
• Digital I/O Pins: 20 (7 PWM)
• Analog Input Pins: 12
• DC Current per I/O Pin: up to 40 mA
• Operating Voltage: 5 V
• Clock Speed: 16 MHz

Connectivity & Development 🔧

• Arduino IDE support with native USB for programming and serial monitoring.
• Standard interfaces: UART, I2C (TWI), and SPI for easy integration with electronics components and sensor modules.
• Interfacing with Raspberry Pi: Communicate via USB or serial/I2C/SPI bridges for hybrid projects.

Typical Applications 💡

• Custom USB HID devices: keyboards, macro pads, game controllers
• Data logging and sensor fusion with analog inputs and PWM control
• Robotics, motor control, and automation systems
• Educational labs and rapid prototyping with Arduino and microcontroller curricula

Package Contents 📦

• 1 × Arduino Leonardo R3 Development Board
• 1 × USB Cable (for programming and power)

Build Faster with Arduino Leonardo R3 🚀

From quick demos to production-ready prototypes, the Arduino Leonardo R3 delivers reliable performance, native USB HID capability, and broad compatibility with Arduino libraries and electronics modules. Start creating responsive interfaces, smart controllers, and precision data systems with 5 V logic and 16 MHz timing—ideal for both hobbyists and professional engineers.