Arduino Leonardo R3 Microcontroller ATmega32u4 Development Board - Arduino Compatible

Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).  

The Leonardo is Arduino's first development board to use one microcontroller with built-in USB. Using the ATmega32U4 as its sole microcontroller allows it to be cheaper and simpler. Also, because the 32U4 is handling the USB directly, code libraries are available which allow the board to emulate a computer keyboard, mouse, and more using the USB-HID protocol!  

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.

Features of the new Leonardo R3

• The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary USB processor.
• The Leonardo can appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port

Specifications

• 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: 40mA
• DC current for 3.3V pin: 50mA
• Flash memory: 32Kb (ATmega32u4) of which 4Kb is used by bootloader
• SRAM: 2.5Kb (ATmega32u4)
• EEPROM: 1Kb (ATmega32u4)
• Clock speed: 16MHz

Package Include:

• Arduino Leonardo R3 (Compatible)
• Mini USB Cable