Arduino Uno

The Arduino Uno is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a 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 Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega16U2 (Atmega8U2 up to version R2) programmed as a USB-to-serial converter.

Picture 1: Arduino Uno Board (front)


Specifications:


> Microcontroller: ATmega328;
> Operating Voltage: 5V;
> Input Voltage (recommended): 7-12 V;
> Input Voltage (limits): 6-20 V;
> Digital I/O Pins: 14 (of which 6 provide PWM output);
> Analog Input Pins: 6;
> DC Current per I/O Pin: 40 mA;
> DC Current for 3.3V Pin: 50 mA;
> Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader;
> SRAM: 2 KB (ATmega328);
> EEPROM: 1 KB (ATmega328);
> Clock Speed: 16 MHz.


The Arduino Uno can be powered via the USB connection or with an external power supply. The power source is selected automatically. The Arduino Uno can be programmed with the Arduino software.


More information for Arduino Uno Board.


Source: ARDUINO.