Arduino Leonardo - without Headers


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Arduino Leonardo is based on the Atmel megaAVR ATmega32U4. Less expensive than other versions, the Leonardo do not need a USB to Serial conversion chip like the UNO as the ATmega32U4 microcontroller has this built-in function.

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 It has the same shape and connectors as the UNO but a simpler circuit and other features like USB emulation (mouse, keyboard...) and more analog pins (12 for the Leonardo, 6 for the UNO).

The USB type B connector is replaced with a micro USB connector.

This version comes without headers pre-soldered. You can purchase compatible headers on Evola.



ATMEGA32U4 Datasheet
Pin mapping Arduino - ATMEGA32U4
Arduino Programming Language Reference
Getting Started with Arduino


Arduino Software
Eagle Files



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