Back to Arduino

Arduino Pro Mini 328 – 5V/16MHz

$8.95 $6.00

Running a 16MHz bootloader, the Arduino Pro Mini is completely free of connectors, enabling you to connect as many unique connections in whatever way you desire! This is SparkFun’s approach to minimal design to enable the lowest possible cost of an Arduino board for professional users.

This new board breaks out the ADC6 and ADC7 pins and also has footprints for adding I2C pull-up resistors. This board directly connects to the FTDI Basic Breakout Board and supports auto-reset (the Arduino Pro Mini also works with the FTDI cable but the FTDI cable does not bring out the DTR pin so the auto-reset feature will not work). This latest version includes moved FTDI headers so pins don’t hang over the edge of the board and a sturdier power selection switch.

Ideal for getting you up and running quickly and in any orientation you need.


  • The Pro Mini also has an on board regulator that can handle up to 12VDC and regulate it down to the board’s operating voltage of 5V. If you are doing this you need to connect the unregulated voltage to the ‘RAW’ pin and not the ‘VCC’ pin.


  • Weighs less than 2 grams!
  • On board Power and Status LEDs.
  • Directly connects to the FTDI Breakout Board.
  • Over current protected.
  • ATmega328 chip running at 16MHz.
  • 0.8mm thick PCB.
  • 8 Analog pins, 14 Digital I/Os.
  • Contains footprints for I2C pull-up resistors.


  • 1 x Pro Mini 328 – 5V/16MHz.


  • PCB Length: 33mm.
  • PCB Width: 18mm.
  • PCB Height: 0.8mm.
Buyer protection
Safe shopping
Easy returns and refunds
Free shipping worldwide

It’s blue! It’s thin! It’s the Arduino Pro Mini!. This is a 5V Arduino running the 16MHz bootloader. Arduino Pro Mini 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 Uno R3. 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 (5V), lack of connectors, and USB off board.

Shipping and delivery

We are proud to offer international shipping services that currently operate in over 200 countries and islands worldwide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says "no information available at the moment".

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you have specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

Refunds & returns policy

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • You do not receive them within the guaranteed time (45 days not including 2-5 day processing)
  • You receive the wrong item
  • You do not want the product you have received (but you must return the item at your expense and the item must be unused)

We do not issue the refund if:

  • Your order does not arrive due to factors within your control (e.g. providing the wrong shipping address)
  • Your order does not arrive due to exceptional circumstances outside our control (e.g. not cleared by customs, delayed by a natural disaster)
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on page.

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

There are no reviews yet.
Write a review

Shopping cart


No products in the cart.