Arduino Leonardo without headers

Arduino Leonardo without headers

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Arduino Leonardo without headers but with its Micro-USB to upload program and power the board.


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.


Please note that this board is very new and so is best used by people with existing Arduino experience as there may be a bug that trips up beginners. Prefer an Arduino Uno R3 if you start with Arduino.

This board is only supported in the latest Arduino IDE 1.0.1 so you will also need to update the IDE.


You also need a Micro USB cable.


Attention !

Some shields doesn't work with this board, we did not had time yet to test all of them and to include the board into our libraries.


Details of the ATmega32u4 signals on the hacking pages of the official webste and on this picture.


A test in german on Arduino Praxis (read).



  • Microcontroller ATmega32u4
  • Operating Voltage : 5V
  • Input Voltage (recommended) : 7-12V
  • Input Voltage (limits) : 6-20V
  • Digital I/O Pins : 20
  • PWM Channels : 7
  • Analog Input Channels : 12
  • DC Current per I/O Pin : 40 mA
  • DC Current for 3.3V Pin : 50 mA
  • Flash Memory : 32 KB (ATmega32u4) of which 4 KB used by bootloader
  • SRAM : 2.5 KB (ATmega32u4)
  • EEPROM : 1 KB (ATmega32u4)
  • Clock Speed : 16 MHz


More informations on the Arduino official page.


Like all our products, this kit is RoHS.

Logo RoHS

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