Arduino UNO Mini Limited Edition

Product ID: 5333


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Update: Dec. 9, 2021 - that was fast! We sold through all of them, we have multiple emails to Arduino about officially stocking these, we've not heard back yet, if and when we do in whatever way (we can get more, or not) - we'll update this page: Ladyada & pt

Squee! It's the cutest, tiniest little Arduino yet! The Arduino Uno Mini Limited Edition packs all of the pizzazz of the Arduino UNO but squished down to a diminutive 34.2mm x 26.7mm size. Powered by the same ATmega328P but with a USB-C connector. Additionally, the pin pitch is also squished down to 1.27mm or 0.05", half the distance on the UNO.

Because the Mini runs just about exactly as the classic UNO, it can easily be re-used in any previous UNO projects. You can use it for basic Arduino sketches as well as USB client projects like making it appear as a mouse or keyboard to your computer, and more!

Comes with female socket headers pre-soldered and runs at 5V logic with a 16MHz crystal. All in an adorable collectable box with signatures from the founders.

Each one is individually numbered, however we do not know which number you will get nor can we guarantee a number.

For more technical details and starting guides, check out the Arduino website

Play video: New Products 12/8/21 feat. Adafruit MSA311 Triple Axis Accelerometer - STEMMA QT / Qwiic!

Technical Details

Additional hardware documentation can be found here


  • Microcontroller: ATmega328P
  • Connector: USB-C
  • Built-in LED pin: 13
  • Digital I/O pins: 14
  • Analog input pins: 6
  • PWM pins: 6
  • UART: yes
  • I2C: yes
  • SPI: yes
  • Circuit operating voltage: 5V
  • Input voltage (limit): 6-12V
  • Battery connector: n/a
  • DC current per I/O pin: 20mA
  • DC current per 3.3V pin: 50mA
  • Main processor: ATmega328P 16MHz
  • USB-serial processor: ATmega16U2 16MHz
  • Memory Atmega328P: 2KB SRAM, 32KB Flash, 1KB EEPROM