Arduino Leonardo - R3

Arduino Leonardo - R3

Arduino Leonardo - R3



The version at prices reduced the Leonardo Arduino without Headers connectors

Guarantee of quality This product is an official product of the brand Arduino

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18,95 € tax incl.

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The Arduino Leonardo is based on the microcontroller ATMEGA32U4, it is an evolution of the Arduino UNO at low cost. Everything has been optimized to reduce costs.

It has 14 digital input/kinds (of which 6 can be used as PWM outputs), 12 analog inputs (with 6 shared on the digital inputs), a 16 MHz quartz oscillator, a USB (micro USB) connection, a power jack, an ICSP connector, and a reset button.

It contains everything needed to fly the microcontroller, simply connect it to a computer with a USB cable to use it simply.

USB management is realized with the ATMEGA32U4 to emulate easily a keyboard or a mouse and other USB as a MIDI link and other devices...

Version Rev3 (R3):

1.0 Pinout: 2 pine (SDA and SSL) are added next to the AREF pin and 2 pine (IOREF and a reserve) are added next to the RESET. These pins will be added on the next shields


The Arduino Leonardo is available in two versions: with or without connectors, it lacks the Headers connectors.


  • Micro-controller: ATMEL ATMEGA32U4
  • Nominal supply voltage: 5V
  • Power supply (recommended): 7 - 12V
  • Supply voltage (limits): 6 - 20V
  • Input/output digital: 20 (including 7 that can be used as outputs PWN)
  • Analog inputs: 12
  • DC Current per I/O Pin: 40 my
  • DC Current for 3.3V Pin: 50 my
  • Flash memory: 32 KB and 4 KB used by bootloader
  • SRAM: 2.5 KB 
  • EEPROM: 1 KB 
  • Clock speed: 16 MHz
  • Official Arduino made in Italy


Documentation Arduino:

Arduino in French documentation:

Arduino Leonardo documentation:

Download the Arduino software

ATMEL ATmega32U4 documentation

Mouse and Keyboard for USB bookstores

Guide to get started with the Arduino Leonardo card

A question?

You want information or information, do not hesitate to ask on the forum:

Data sheet

Micro-contôroleur - Horloge16 MHz
Flash32 KB
Entrées/Sorties numériques20
Tension logique (GPIO)5V
Entrées analogiques12
Alimentation nominale7V à 12V
Alimentation limite4,5V à 20V
Connectique pour chargementmicro USB


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