Arduino Leonardo

Arduino Leonardo Australia
Arduino Leonardo Australia Arduino Leonardo Australia Arduino Leonardo Australia Arduino Leonardo Australia Arduino Leonardo Australia
Product ID: PL-2192


We can get 61 units from Pololu Australia.
If you order today we can dispatch this stock between Wednesday, Mar 20 and Monday, Mar 25 2019.

Updated about 1 month ago
Data Sheets & Documents
Updated 11 months ago
Updated about 1 month ago
Pololu's Description of the Arduino Leonardo


Arduino Leonardo, top view.

Arduino Leonardo, bottom view.

Note: There are differences between the Leonardo and previous Arduino boards. As such, there could be incompatible Arduino shields and libraries. The Leonardo works with our motor and robot shields, and it works with our Wixel shield in a limited capacity: the wireless serial features work, but the wireless reprogramming does not.


The Arduino Leonardo is a microcontroller board based on the ATmega32U4. It has 23 digital input/output pins (of which 7 can be used as PWM outputs and 12 can be used as analog inputs), a 16 MHz crystal, a USB connection, a power jack, an in-circuit system programming (ICSP) header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer (or appropriate wall power adapter) with a Micro USB cable or power it with a AC-to-DC adapter or battery to get started (USB cable and power supply are not included). This board ships with the power jack and through-hole headers soldered in, as shown in the product picture.

The Leonardo differs from all preceding Arduino boards in that the user-programmable ATmega32U4 AVR microcontroller has built-in USB functionality, eliminating the need for a secondary processor. This makes the Leonardo more versatile: in addition to supporting a virtual (CDC) serial/COM port interface, it can appear to a connected computer as a mouse and keyboard. See Arduino’s getting started page for more implications of the Leonardo’s single-MCU design.

The Arduino has a large support community and an extensive set of support libraries and hardware add-on “shields” (e.g. you can easily make your Arduino wireless with our Wixel shield), making it a great introductory platform for embedded electronics. Note that we also offer a SparkFun Inventor’s Kit, which includes an Arduino Uno along with an assortment of components (e.g. breadboard, sensors, jumper wires, and LEDs) that make it possible to create a number of fun introductory projects.

More information about the Arduino Leonardo is available on Arduino’s website. Note that the Leonardo only works with the Arduino IDE version 1.0.1 or later.

Warning: We recommend not connecting the Arduino to USB while it is powered through VIN. See this forum post for more information.

Choosing the right controller

The table below compares the Arduino Uno, Leonardo, and our A-Star 32U4 Prime controllers. The A-Star Primes are based on the same ATmega32U4 AVR microcontroller as the Leonardo and ship with Arduino-compatible bootloaders, so they can be used a direct substitutes for the Leonardo in typical applications. The Primes also offer many advantages, including superior power management that enables efficient operation from 2.7 V to 11.8 V (LV version) or 5 V to 36 V (SV version).

Arduino Uno R3

Arduino Leonardo

A-Star 32U4 Prime LV

A-Star 32U4 Prime SV
Clock:16 MHz resonator16 MHz crystal16 MHz crystal
User I/O lines:202326
PWM outputs:677
Analog inputs:61212
Ground access points:4443
User LEDs:333
User pushbuttons:3
Reset button:yesyesyes
Power switch:  yes
Buzzer option:  yes
microSD option:  yes
LCD option:  yes
USB connector:BMicro-BMicro-B
power selection:
input voltage:
7 V to 12 V7 V to 12 V2.7 V to 11.8 V5 V to 36 V
Regulator type (5 V):linearlinearswitching
5 V
at 3 V in0.75 A
at 5 V in1.5 A0.2 A
at 7 V in1.0 A1.0 A1.5 A1.0 A
at 9 V in0.5 A0.5 A1.5 A1.0 A
at 11 V in0.35 A0.35 A1.5 A1.0 A
at 24 V in1.0 A
via USB
0.5 A(1)0.5 A(1)1.5 A(1)1.5 A(1)
Weight:28 g20 g13 g to 33 g

1 With sufficiently capable USB power supply.

Side-by-side comparison of the A-Star 32U4 Prime LV microSD to the Arduino Leonardo.

Arduino Leonardo is listed in: