Arduino Leonardo (with headers)

Description

The Arduino Leonardo is a microcontroller board based on the ATmega32u4 (datasheet). 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.

microcontrollers
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 for 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

TECHNICAL INFO:
Producer's page
ATmega32u4 datasheet
EAGLE CAD files
Schematic [pdf]

Product information