Description: The UNO R3 board is 100% compatible with the original Arduino and now it has perfect quality and performance .Arduino is an open source physical computing platform based on a simple I/O board and a development environment that implements a processing/wiring language.Arduino can be used to develop standalone interactive objects or can be connected to software on a computer (e.g. Flash. Processing, MaxMSP). The open source IDE can be downloaded for free (currently available for Mac OS X, Windows and Linux). This is the new Tosduino Uno R3. In addition to all the features of the previous motherboard, Uno R3 now uses the ATmega16U2 instead of the ATmega8U2 chip. This allows faster transfer rates, no drivers for Linux or Mac (requires Windows inf file), and the ability to have Uno display as keyboard, mouse, joystick, etc. Note: TOSduino Uno R3 requires the Arduino 1.0 driver folder to install correctly on some computers. We have tested and confirmed that R3 can be programmed in older versions of the IDE. However, the first time you use R3 on a new computer, you will need to have Arduino 1.0 installed on that computer. the small chip is the ATmega16U2, 28