The UNO is an entry level Arduino board and perhaps the most popular board for beginners. It is powered by ATmega328 microcontroller. The board has 14 digital I/O pins (6 of them can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connector, a regular DC power jack and a reset button.
How do I power this board?
To power the board, you can connect use a USB Type A to Type B cable that connects to a computer or a 5V power supply. This is useful when you want to upload your Arduino sketch to the board. Take note that in this mode, current draw is limited to around 500mA only.
The recommended way to power this board is using the a DC power supply such as wall plug or a battery connected to the DC barrel jack (5.5mm x 2.1mm, center positive). Unlike the Raspberry Pi, the DC barrel jack for Arduino/Genuino UNO can accept a wider range of voltage from 7V to 12V. This is our recommended power supply.
This is an official and genuine Genuino UNO board, made by authorized manufacturer.
