Arduino Uno is a ATmega328P based microcontroller board. Arduino Uno has 14 digital inputoutput pins, 6 of then can optionally be used as PWM outputs. Arduino also has 6 analog inputs, a USB Port, 12V DC power input port, an ICSP header, a 16 MHz crystal oscillator, a reset button and couple of indicator LEDs. Arduino also has a built in DC converter which outputs 5V and 3.3V DC outputs, which can directly be used to power up a low-power device or components. Arduino uses an open source design. Thus various manufacturers make their own versions of Arduino. This is the China made version which is cheaper.

Arduino Uno is a ATmega328P based microcontroller board. Arduino Uno has 14 digital inputoutput pins, 6 of then can optionally be used as PWM outputs. Arduino also has 6 analog inputs, a USB Port, 12V DC power input port, an ICSP header, a 16 MHz crystal oscillator, a reset button and couple of indicator LEDs. Arduino also has a built in DC converter which outputs 5V and 3.3V DC outputs, which can directly be used to power up a low-power device or components. Arduino uses an open source design. Thus various manufacturers make their own versions of Arduino. This is the China made version which is cheaper.