Arduino Leonardo Microcontroller Development Board with Headers

The Arduino Leonardo is an ATmega32u4-based microcontroller development board featuring integrated USB communication and pre-soldered headers. It is an ideal platform for students, educators, and hobbyists looking to build custom electronics projects and interactive USB peripherals.

ATmega32u4 microcontroller core

Powered by the ATmega32u4 chip, the board executes embedded programs directly while handling integrated peripheral tasks on a single piece of silicon.

Native USB functionality

Thanks to native USB support, the Leonardo can appear to a connected computer as a generic mouse, keyboard, or custom human interface device.

Digital and PWM interfaces

The board provides 20 digital input and output pins, 7 of which can be utilised as PWM channels for dimming LEDs or driving actuators.

Extensive analogue inputs

With 12 dedicated analogue input channels, you have ample capacity to connect a wide variety of analogue sensors and potentiometers.

Micro USB connection

A built-in Micro USB interface facilitates simple firmware flashing, serial communication, and board power through a standard cable.

Downloads & documentation

• datasheet
• arduino-leonardo-schematic
• Arduino leonardo reference design