Hi all, I have a water pump connected to an adapter (pictured) but I am having trouble getting it to run using any of the cords I had on hand; it calls for using DC-only & 12V (between 9-14). I have tried Googling around & browsing Amazon but I’m a bit overwhelmed with options. Can anyone suggest an adapter that’ll get this little guy pumping? Please forgive my naivety & TIA.

Also, I hope that it’s kosher I ask here. If it’s not, please let me know if there’s a better place. Thanks again.

  • czardestructo@lemmy.world
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    1 year ago

    What did you hook up? You mentioned using cords? But first off, what you pictured, you need to make sure it’s wired correctly. There is no standard for barrel jacks. The center pin can be positive or negative and the jacket and be positive or negative. If you’re using a generic 5.5x2.1mm female barrel jack most generic 12v power supplies overwhelmingly do center pin positive and jacket negative. Once you get polarity correct check the amperage rating of the supply and the motor. Motors usually require huge in rush current to start and can easily trigger a short circuit protection on the supply output

  • Shortbus@lemmy.world
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    1 year ago

    Since the pump doesn’t seem to mention it does the pump packaging/paperwork mention how many amps it draws?

    Edit I found it. Load current < 350mA

    I would think damn near any 12v DC “wall wart” would do it, but the adapter you have may not be the right size for what you have laying around.

    Could grab something like THIS that comes with its own adapter.

    • lossykittens@reddthat.comOP
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      1 year ago

      Thanks- I got the thing running through a breadboard power adapter of all things, to confirm the pump was still living, so I will try what you linked! I am beginning to wonder if I wired my last adapters’ poles. So, this might have been user error on my part, doh!

    • czardestructo@lemmy.world
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      1 year ago

      I personally wouldn’t put any unbranded and uncertified AC to DC converter in my home. Without proper regulatory testing and certification it’s a fire hazard.

      • 🍔🍔🍔@toast.ooo
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        1 year ago

        you know, I saw the CE mark on the label, but oddly enough on closer inspection it appears to be like a knockoff? i hadn’t heard of this before but apparently when they’re close together like that it actually stands for China Export which (unlike the real CE) has no safety standards associated

        this is actually pretty egregious and I’m not sure how they’re getting away with it lol but anyways I appreciate the call out, learned something today

        • nilclass@discuss.tchncs.de
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          1 year ago

          Afaik that’s a myth. There is no testing or certification associated with the CE logo, it’s just a self-declaration of the manufacturer that certain standards are met. You can just buy rolls of these stickers, or print them yourselves. That’s what manufacturers do, legit ones and shitty ones.

          • czardestructo@lemmy.world
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            1 year ago

            Legit companies won’t just print it without self testing. At any point the EU can demand test data and if you don’t have it they can block your company from shipping there. It also opens the company up to lawsuits. Big companies with a brand to protect won’t mess around with this, it’s cheaper to design and test.