Arduino Leonardo ATmega32u4 with headers
Discontinued: This product has been discontinued.
The Arduino Leonardo is a microcontroller board based on the ATmega32U4, featuring built-in USB communication that allows it to appear as a keyboard, mouse, or serial device to a connected computer — no secondary USB chip required. This version comes with all headers pre-soldered for easy breadboard and shield use.
With 20 digital I/O pins (7 PWM, 12 analog inputs), a 16MHz crystal oscillator, micro USB connection, power jack, and ICSP header, the Leonardo contains everything needed to get started. Also available without headers for a thinner, more compact option.
Key Features
- Native USB – Built-in USB on the ATmega32U4 enables keyboard, mouse, and serial device emulation
- Pre-Soldered Headers – Ready for immediate use with breadboards and compatible shields
- 20 Digital I/O Pins – 7 usable as PWM outputs, with 40mA per pin
- 12 Analog Inputs – 10-bit resolution on pins A0–A11
- Multiple Power Options – Micro USB, DC power jack (7–12V), or VIN pin header
Specifications
- Microcontroller – ATmega32U4
- Operating Voltage – 5V
- Input Voltage – 7–12V recommended
- Digital I/O Pins – 20
- PWM Channels – 7
- Analog Input Channels – 12
- Flash Memory – 32KB (4KB used by bootloader)
- SRAM – 2.5KB
- EEPROM – 1KB
- Clock Speed – 16MHz
Note: The Leonardo differs from the Arduino Uno in its USB handling and is best suited for users with some Arduino experience. Not all Uno-compatible shields will work with the Leonardo. Requires Arduino IDE 1.0.1 or higher.
Ideal For
- USB HID projects (custom keyboards, mice, game controllers)
- Interactive installations and MIDI controllers
- General-purpose electronics prototyping
Package Contents
- 1× Arduino Leonardo ATmega32U4 (with headers)
The Arduino Leonardo ATmega32u4 with headers appears in the following collections:
SKU AF-849
by Adafruit
