Arduino Pro Mini 328 – 3.3V/8MHz



  • SparkFun
Availability: Temporarily Out Of Stock

The Pro Mini is SparkFun’s take on a minimal design approach to Arduino. This microcontroller is based on the ATMEGA328 and operates with 3.3V logic level and 8MHz.

Out of Stock - Available on Backorder

SKU: MCR-029 Manufacturer: SparkFun Mfg Part Number: DEV-11114 Category: Tags: , , ,


It’s blue! It’s thin! It’s the Arduino Pro Mini! SparkFun’s minimal design approach to Arduino. This is a 3.3V Arduino running the 8MHz bootloader. Arduino Pro Mini does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. We recommend first time Arduino users start with the an Uno or a SparkFun Redboard / Adafruit Metro. It’s a great board that will get you up and running quickly. The Arduino Pro series is meant for users that understand the limitations of system voltage (3.3V), lack of connectors, and USB off board.

SparkFun really wanted to minimize the cost of an Arduino. In order to accomplish this they used all SMD components, made it two layer, etc. This board connects directly to the Adafruit FTDI Friend and supports auto-reset. The Arduino Pro Mini also works with our FTDI cable but the FTDI cable does not bring out the DTR pin so the auto-reset feature will not work. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you’re supplying unregulated power to the board, be sure to connect to the “RAW” pin and not VCC.

The latest and greatest version of this board breaks out the ADC6 and ADC7 pins as well as adds footprints for optional I2C pull-up resistors! It does not include any headers so best pick up a few if you are planning to use this with a solderless breadboard!

Please Note: A portion of this sale is given back to Arduino LLC to help fund continued development of new tools and new IDE features.


  • ATmega328 running at 8MHz
  • USB connection off board
  • 5V regulator
  • Over current protected
  • DC input 3.3V up to 12V
  • Analog Pins: 8
  • 0.8mm Thin PCB
  • Supports auto-reset
  • Max 150mA output
  • Weighs less than 2 grams!
  • On board Power and Status LEDs
  • Digital I/Os: 14

Package Contents

  • 1 x Arduino Pro Mini 328 - 3.3V/8MHz

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  Difficulty Level

Soldering Skill: Beginner
Prototyping Skill: Beginner
Programming Skill: Beginner

  Product Certifications

  Product Attributes

Weight: 5 g

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.

More Information:
For more information on our Warranty and Return Policies, please consult our   Terms of Service


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