We will be closed on November 25, 2021 and November 26, 2021 in observance of the Thanksgiving holiday. We will resume normal operations on November 29, 2021. Wishing you a safe and happy holiday from all your friends at SparkFun!


Receive a free SparkFun USB Thumb Drive with every order this weekend. Details.

SparkFun USB Mini-B Breakout

This new version now has all 5 pins broken out on the connector. We have no idea what USB device you are hooking up to, but if you need to add a miniUSB/USB Mini-B connector to your breadboard - here it is. Also good for an un-regulated, non-limited 5V supply up to 100mA.

  • [Eagle Files](http://cdn.sparkfun.com/datasheets/BreakoutBoards/miniUSB Breakout v13.zip)
  • GitHub

SparkFun USB Mini-B Breakout Product Help and Resources

mbed Starter Kit Experiment Guide

November 27, 2014

This Experiment Guide will get you started with the wonderful world of mbed microcontrollers. Need to find that next step after mastering the Arduino? This a great place to take those skills to the next level.

Connector Basics

January 18, 2013

Connectors are a major source of confusion for people just beginning electronics. The number of different options, terms, and names of connectors can make selecting one, or finding the one you need, daunting. This article will help you get a jump on the world of connectors.

Core Skill: Soldering

This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.

1 Soldering

Skill Level: Noob - Some basic soldering is required, but it is limited to a just a few pins, basic through-hole soldering, and couple (if any) polarized components. A basic soldering iron is all you should need.
See all skill levels


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • How about a mini A/B? The reason for asking some of the projects that have OTG, ie UBW32

  • Anyone have a schematic to connect this to the atmega328?

    • That's tricky and depends on what you want to do. The ATMega328 does not support USB, so you would need some sort of interface depending on what you were looking to do.

  • Sorry for the stupid question, but would this board predominantly be used for making temporary connections for boards such as the Arduino Pro Minis which lack a USB connection for the purpose of programming them? I assume by using a temp connection, this board could be used to program multiple Arduino Minis?

    • sorry, found the answer i needed - im looking for an FTDI board/cable. May i take this time to think all you ppl for those tutorials. I am forever in your debt for teaching me how to fish.

  • For all of those who don't have Eagle or don't want the hassle of going into Eagle and making the measurements... (all measurements are in mm) All holes are 2.54 away from the edge 13.97 from center of hole to center of hole 19.05 from edge to edge on one side 20.32 from center of hole to center of hole 25.4 from edge to edge on the other side

  • Where can I find the Eagle file for this board?

  • Does "Also good for an un-regulated, non-limited 5V supply up to 100mA" mean that you can plug a wall wart power plug with mini-usb connector into it to power a project (with appropriate regulation/filtering)?

  • is it really only 100 mA? I'm almost positive it's 1000 mA, did y'all leave out a third zero by accident?
    edit: for what it's worth, I'm only planning on making a very short charge-only cable for use with wall-wart USB adapters... will I run into problems pumping more than 100mA or will the wall adapters know not to?

    • I believe the USB spec allows the host to supply up to 100 mA for "unknown" USB devices. For recognized devices (i.e., the host OS has a driver for it), the host can supply up to 500 mA.

  • I want to know the difference between "BOB-08401" and "BOB-09966", Could you tell me infomation about their deimensions, etc..?

  • what is the pin spacing?.1"?

  • Just wondering if the board comes populated as shown in the pictures? Seems like a really good deal if so..considering the mini-B connector itself is a buck five-0

  • What does the ID pin do?<br />
    <br />
    Thanks -- mfc

    • some devices will send information about itself over that pin. for all practical purposes the ID pin can be left disconnected.

Customer Reviews

4.6 out of 5

Based on 8 ratings:

Currently viewing all customer reviews.

Great product

Standard good quality SparkFun construction. Versatile with 5 pins. Many uses.

Very good product

Works very well.. I really like the connection pin spacing.. It fits 0.1 pin headers perfectly.

great easy to use product SparkFun USB Mini-breakout

well made easy to correctly wire and good mounting surface

Great produst

Very well made and works perfectly.

Handy gadget

I use these on prototyping boards to power projects. Since I seem to have a surplus of wall worts with mini usb connectors, makes a very fast way to add power without having to add voltage regulators to the project.

Used it to test some home made USB power cords

Worked perfectly.