Wall Adapter Power Supply - 5V DC 1A

High quality switching 'wall wart' AC to DC 5V 1000mA wall power supply manufactured specifically for Spark Fun Electronics. These are switch mode power supplies which mean the output is regulated to 5V (no more 14V outputs!) and the capable output current is much higher (1000mA!). Please note, this specific supply (5V/1A) is also FCC/CE certified!

These will power most projects that don't require more than 1000mA of current. Center-positive 5.5x2.1mm barrel connector.

Works with 100-240VAC inputs.

Note: These power supplies were found in back stock on a recent inventory count. We will not be carrying this part again wonce stock is gone. Get it while you can.


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.

  • dcormier / about 12 years ago / 5

    I think it could be handy if you guys sold the guts your wall-wart AC adapters. Instead of a household plug on one end and a barrel connector on the other, just put screw terminals to allow to to tap AC power in one side, and headers (or something similar) that output DC on the other side.
    This would make it easier to build devices that don't require an external AC adapter. We can just attach a length a cord that plugs into a household jack, or otherwise connect to AC, and the self-contained project will have power.

  • wchill / about 13 years ago / 4

    Any chance of getting a 5V 3A wall adapter? My DIY iPod dock may need that kind of current.

    • STrRedWolf / about 13 years ago / 2

      I'm all for a 5V 3A wall adapter. I have a 5V 1A powering a USB hub that powers a Beagle Board, and I'd love to get a bit more power out to it.

  • Nakor / about 12 years ago / 3

    I'm new so I apologize if this is a silly question. Since this is regulated, do I need the Breadboard Power Supply kit or just a barrel jack?

    • This will give you more or less 5V (not exactly, but good enough for chips rated 4.75V to 5.25V). So all you need is a barrel jack. Just make sure to get the right size barrel jack (2.1mm).
      Ya might want to get two of these while you are at it, because they are not the best quality available and do have a relatively high failure rate.

  • If the torlerance is 4.5v, would this break it?

  • Can I use this for power up an Arduino UNO?

    • MikeGrusin / about 10 years ago / 1

      The 9V version would be a better choice. (The 5V regulator requires > 6.5V input to regulate properly.)

  • Steven Osborn / about 11 years ago / 1

    I bought two of these, one was a complete dud (DOA) and the other seems pretty flakey on my arduino with even ~100ma on it. I have a similar 5v supply I have been using for some time that has no issue with the same load and it's only rated for 250ma.

    • If you have a malfunctioning part, please contact us at tech support so we can get you set up with a replacement.

  • Vrmithrax / about 11 years ago / 1

    Are these units that can be easily opened and re-sealed? Might want to get some to use with a specialized cable I need... Anyone know?

    • yeah, I've broken into them a few times. I actually fit a pro-mini inside one once, just BARELY. they're pretty easy to open and add your own wires.

      • Vrmithrax / about 11 years ago / 1

        Good to know. Is it a "crack it open and glue it closed" situation, or actual screws to open it up? The unit I have now is one of block styles with 4 screws to open it up - very nice, very hard to find in the 5V-1A output range.

        • There's a single screw right above the prongs. Unscrew that and the case just comes open. If you look closely in the picture above, you can see the recessed hole for it to the left of the prongs.

          • Vrmithrax / about 11 years ago / 1

            Ah, perfect, thanks! Think I'll have to grab one and try it out...

  • Be aware that a number of these that were shipped around the beginning of 2011 do not come with a 2.1mm connector; rather it is a 2.5mm connector. Plugging a 2.5mm plug into a 2.1mm jack might work, but it can result in an intermittent connection and should be de-rated as to it's power handling capability. You can check to see which type of connector you have by measuring the inside diameter of the plug; it should be 2.1mm or 2.5mm in diameter.

  • pikachu / about 12 years ago * / 1

    I was looking for something to use for an Arduino. I was going to buy this until I found the Sparkfun USB 5 V source http://www.sparkfun.com/products/10214.

  • NightOwl / about 14 years ago / 1

    Cheap but unreliable.
    I ordered 2. The first one was Dead on Arrival.
    Installation instructions:
    1) Plug into wall
    2) If no red light on power supply throw in trash
    (Confirmed no output voltage with DMM)
    Not worth shipping to try to send it back.
    The second unit appears to work.
    Output Voltage is 5.24V.
    Switching frequency is 100kHz (about 100mVp-p switching noise on scope).

    • Oceanstate8 / about 12 years ago / 2

      I had one that was DOA. When I opened it, I noticed that one of the wires that connected the AC prongs to the PCB had broken off at the soldier joint. It's a fairly small gauge stranded wire that's used for the connection. After stripping it back and resoldering, it's been working great ever since. While it might not be the best quality wall wart, fixing it should be a cake walk for the typical Sparkfun customer.

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