DC Barrel Jack Adapter - Male

This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5x2.1mm, center-positive male barrel jack. If you need to connect bare wires to a barrel jack on an Arduino or a development board, this might be the simple solution.

Please be aware that the max current for this adapter is 10A.

DC Barrel Jack Adapter - Male Product Help and Resources

12V/5V Power Supply Hookup Guide

May 10, 2018

In this tutorial, we will replace the 12V/5V (2A) power supply's molex connector with two male barrel jacks adapters.

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.

Power Output

These are great if you need to modify the output from a power supply and need to quickly connect the output power to an Arduino's barrel jack connector. Just make sure to test the pins with a multimeter and secure the wires.

Core Skill: DIY

Whether it's for assembling a kit, hacking an enclosure, or creating your own parts; the DIY skill is all about knowing how to use tools and the techniques associated with them.


Skill Level: Noob - Basic assembly is required. You may need to provide your own basic tools like a screwdriver, hammer or scissors. Power tools or custom parts are not required. Instructions will be included and easy to follow. Sewing may be required, but only with included patterns.
See all skill levels


Looking for answers to technical questions?

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  • Member #777568 / about 8 years ago / 1

    I really think they're ridiculously overpriced.

    For this price on E-bay, one can buy 5 PAIRS of these (free shipping). So it's 10x more expensive.

    A 10x price margin for such a convenient product isn't very nice. Everyone should be able to have at least 10 of these lying around.

    I'm not trying to blame anyone or shoo people away from Sparkfun, but I'm extremely curious how the Chinese manage to sell it 10x cheaper (with free shipping from China).

  • Do you have something like this with just wires coming off instead of the weird blocky back?

  • waaronw / about 13 years ago / 1

    I love this thing! Saves me a ton of time. My only complaint: The screw terminals are marked "+" and "-" but it would be more accurate to have them labeled as Center and Ring using the classic icon used on most wall-wart transformers. Same on the female version.

  • seulater / about 14 years ago / 1

    Now That is one of the coolest things i have seen in a long while ! <br />

  • Quazar / about 14 years ago / 1

    Dangit - I just placed an order! It seems like you always post something I want the day after I make an order. Sneaky!<br />
    - Dean

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