Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analogue 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.

• Microcontroller ATmega328P
• Operating voltage of 5V
• Maximum supply voltage 6 to 20V
• Digital I/O pins 14 (of which 6 provide PWM output)
• DC current per I/O pin 40mA
• DC current for 3.3V pin 50mA
• Flash memory16KB of which 2KB is used by boot loader
• SRAM 2KB, EEPROM 1KB
• Clock speed 16MHz
• Can be powered via the USB connection or with an external power supply