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 crystal oscillator, 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.

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

1. Origainal ARDUINO – Compare Board Specs
2. Compare Arduino Uno vs Mega 2560

	Keywords	arduino, uno, atmega328
	Device	UNO rev3
	Type	UNO | rev3 | Microcontroller | Board
	References	Arduino Page