Genuino Uno R3

Description
The Arduino Uno is a microcontroller board based on the ATmega328. It has 20 digital input/output pins (of which 6 can be used as PWM outputs and 6 can be used as analog inputs), a 16 MHz resonator, a USB connection, a power jack, an in-circuit system programming (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 Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features an ATmega16U2 programmed as a USB-to-serial converter. This auxiliary microcontroller has its own USB bootloader, which allows advanced users to reprogram it.
The serial pins of an Arduino board are TX (1) and RX (0) pins and these pins can be used to transfer the TTL serial data. The connection of these pins can be done with the equivalent pins of the ATmega8 U2 USB to TTL chip.

Features
It is an ATmega328P based Microcontroller
The Operating Voltage of the Arduino is 5V
The recommended input voltage ranges from 7V to 12V
The i/p voltage (limit) is 6V to 20V
Digital input and output pins-14
Digital input & output pins (PWM)-6
Analog i/p pins are 6
DC Current for each I/O Pin is 20 mA
DC Current used for 3.3V Pin is 50 mA
Flash Memory -32 KB, and 0.5 KB memory is used by the boot loader
SRAM is 2 KB
EEPROM is 1 KB
The speed of the CLK is 16 MHz