Arduino Leonardo Development Board – ATmega32u4, USB HID, Arduino Compatible
The Arduino Leonardo is a compact and versatile microcontroller board powered by the ATmega32u4. Unlike earlier Arduino boards, the Leonardo uses its microcontroller’s built-in USB communication, eliminating the need for a separate USB-to-serial converter. This allows the board to function as a keyboard, mouse, or virtual COM port (CDC) in addition to running your Arduino sketches, making it an excellent choice for HID (Human Interface Device) projects.
With 20 digital I/O pins (7 PWM outputs and 12 analog inputs), a 16 MHz crystal oscillator, and a lightweight form factor, the Leonardo is ideal for creative projects where space and native USB functionality matter. It comes with everything needed to get started—just connect it to your computer with a USB cable or power it via an adapter or battery.
Key Features
- Native USB Support: Appears directly as a keyboard, mouse, or serial device.
- Compact & Lightweight: Ideal for portable or embedded projects.
- Versatile I/O: 20 digital pins, 7 PWM channels, and 12 analog inputs.
- Beginner-Friendly: Plug-and-play with the Arduino IDE, no additional drivers needed.
- Affordable Innovation: A budget-friendly board for students, makers, and educators.
Technical Specifications
- Microcontroller: ATmega32U4
- Operating Voltage: 5V
- Input Voltage (recommended): 7–12V
- Input Voltage (limits): 6–20V
- Digital I/O Pins: 20 (7 PWM outputs)
- Analog Input Channels: 12
- DC Current per I/O Pin: 20 mA
- DC Current for 3.3V Pin: 50 mA
- Flash Memory: 32 KB (4 KB used by bootloader)
- SRAM: 2.5 KB
- EEPROM: 1 KB
- Clock Speed: 16 MHz
- Built-in LED Pin: 13
- Dimensions (L × W): 68.6 mm × 53.3 mm
- Weight: 20 g
The Arduino Leonardo is a go-to choice for USB interface projects, robotics, and educational applications. Whether you’re building a custom keyboard, a simple IoT prototype, or an interactive art installation, the Leonardo provides simplicity, flexibility, and powerful USB integration in a compact form.
