The UNO R3 board compatible with Arduino has micro controllers: ATmega328 This UNO board compatible with arduino has 14 digital input/output pins (of which 6 can be used as PWM outputs) 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button Input Voltage (Recommended): 7V ~ 12V The package includes: 1x UNO R3 board compatible with Arduino and 1x USB cable This is the new arduino uno R3. In addition to all the features of the previous board, the uno now uses an ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows for faster transfer rates and more memory. No drivers needed for Linux or Mac (inf file for Windows is needed and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc. The Uno R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The Uno R3 works with all existing shields but can adapt to new shields which use these additional pins. 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).
Digital I/O Pins: 14 (of which 6 provide PWM output) Flash Memory: 32 KB (ATmega328P) of which 0.5 KB used by bootloader. SRAM: 2 KB (ATmega328P),.
Flash Memory: 32 KB (ATmega328P) of which 0.5 KB
used by bootloader. SRAM: 2 KB (ATmega328P), Operating Voltage 5V
used by bootloader. SRAM: 2 KB (ATmega328P),
It is an ATmega328P based Microcontroller The Operating Voltage of the module 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 Analog i/p pins are 6