Arduino Leonardo development 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, 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.

Processor
Microcontroller model:	ATMega32u4
Microcontroller frequency:	16 MHz
Memory
Flash memory:	0.032 MB
SRAM (Static Random Access Memory):	2.5 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory):	1 KB
Ports & interfaces
Wi-Fi:
Ethernet LAN:
USB ports quantity:	1
Number of digital I/O pins:	20
Number of analog I/O pins:	12
PWM digital I/O pins:	7
Features
Form factor:	Arduino
Power
DC input voltage:	7-12 V
Operating voltage:	5 V
Input voltage (max):	6 - 20 V
DC current per I/O pin:	40 mA
Weight & dimensions
Board dimensions:	53.3 x 68.6 mm
Weight:	20 g