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Arduino Uno Microcontroller Board

Arduino Uno is a microcontroller development board based on the Atmel ATmega328 MCU. The Arduino Uno 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. This Arduino MCU board 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 Arduino Uno differs from other development boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega8U2 programmed as a USB-to-serial converter. The Arduino Uno MCU board can be powered via the USB connection or with an external power supply. The power source is selected automatically.

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• Powered via USB connection or external power supply - with power source selected automatically
  
• External (non-USB) power from an AC-to-DC adapter (wall-wart) or battery
  
• Operates on external supply of 6 to 20 volts (7-12V recommended)
  

• 32 KB flash memory (with 0.5 KB used for the bootloader).
• 2KB SRAM
• 1KB EEPROM
  

• 14 digital pins that can be used as an input or output
  
• 6 analog inputs, each of which provides 10 bits of resolution (i.e. 1024 different values)

• Max PCB length and width of 2.7 and 2.1 inches
• USB connector and power jack extend beyond PCB

• Designed to communicate with a computer, another Arduino, or other microcontrollers
  
• ATmega328 provides UART TTL (5V) serial communication
• Onboard ATmega8U2 channels serial communication over USB
  
• ATmega328 supports I²C (TWI) and SPI communication

• Can be programmed with Arduino software
  
• ATmega328 comes preburned with bootloader for uploading new code without external hardware programmer
  
• MCU can be programmed through ICSP (In-Circuit Serial Programming) header