The Arduino Uno board is a microcontroller based on the ATmega328. Arduino is an open-source prototyping platform and its simplicity makes it ideal for hobbyists to use as well as professionals. The Arduino Uno has 14 digital input / output pins (6 of which can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power outlet, an ICSP connector, 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 an AC-to-DC adapter or battery to start.
The Uno Arduino differs from all previous boards in that it does not use the FTDI USB-serial driver chip. Instead, it features the Atmega8U2 microcontroller chip programmed as a USB-to-serial converter.
“Uno”, one in Italian and is named to mark the upcoming release of Arduino 1.0. The Arduino Uno and version 1.0 will be the reference version of Arduno, going ahead. The Uno is the latest in a series of Arduino USB boards, and the benchmark model for the Arduino platform.
The open-source Arduino IDE drivers can be downloaded for free and we have created a download and installation tutorial for the Windows XP platform.