ARDUINO - ATMEGA32U4, LEONARDO (+HEADERS) - A000057

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 getting started page.

This version of the Leonardo comes assembled.

Technical specifications

Microcontroller - ATmega32u4

Operating Voltage - 5V

Input Voltage (recommended) - 7-12V

Input Voltage (limit) - 6-20V

Digital I/O Pins - 20

PWM Digital I/O Pins - 7

Analog Input Pins - 12

DC Current per I/O Pin - 40 mA

DC Current for 3.3V Pin - 50 mA

Flash Memory - 32 KB

Flash Memory for Bootloader - 4 KB

SRAM - 2.5 KB

EEPROM - 1 KB

Clock Speed - 16 MHz

Lenght - 68.6 mm

Width - 3.3 mm

Links:

getting started page