• Arduino Uno with mount in isometric pose.
  • Close-up of Arduino logo.
  • Bottom of Arduino Uno.
  • Arduino Uno on a table next to other components.
  • Arduino Uno dimensions.

Arduino Uno


Prototype your next project with the Arduino Uno, one of the most popular microcontroller boards available.


  • Popular and well-supported by the community
  • Digital I/O and analog input pins
  • Supports serial, PWM, and SPI communication
  • Genuine Arduino board

The Arduino Uno is a popular microcontroller board that features fourteen digital I/O pins and six analog input pins which can support a variety of projects. Using a USB-B cable (not included), you can connect the Arduino Uno to your computer and program it using the Arduino IDE.

Once the Arduino Uno is programmed, you can remove the USB-B cable and power it using the barrel jack connector. Make sure your external power supply provides 7-12VDC and at least 1A.

Operating voltage5V
Input voltage (recommended)7-12V
Input voltage (limit)6-20V
PWM digital I/O pins6
Digital I/O pins14
Analog input pins6
DC current per I/O pin20mA
DC current for 3.3V pin50mA
Flash memory32KB (0.5KB used by bootloader)
Clock speed16MHz
Built-in LED pin13

Only ships to the United States at this time.


Guaranteed free from manufacture defects for a period of thirty (30) days from the date of purchase.

Please see our Returns and Exchanges Policy for more information.