The Arduino Leonardo is a microcontroller board based on the ATmega32u4 (). It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port. It also has other implications for the behavior of the board; these are detailed on the

Related Boards

If you are interested in boards with similar functionality, at Arduino you can find:

Getting started

Find inspiration for your projects with Leonardo board from our tutorial platform

The page contains all the information you need to configure your board, use the , and start tinkering with coding and electronics.

From the section you can find examples from libraries and built-in sketches as well other useful information to expand your knowledge of the Arduino hardware and software.

Need Help?

Check the Arduino Forum for questions about the , or how to make your own . Need any help with your board please get in touch with the official Arduino User Support as explained in our page.

Warranty

You can find your board warranty information.