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A New Chapter for MagicMirror: The Community Takes the Lead
Read the statement by Michael Teeuw here.

Can the usb port from a monitor power the rpi3?

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  • K Offline
    KirAsh4 Moderator
    last edited by Oct 5, 2016, 5:43 PM

    And even if you find out that you need additional devices later, you are better off with a good quality self-powered USB hub. They’re cheap, they’re small, you could even remove the whole circuitry from the case for a much smaller form factor.

    A Life? Cool! Where can I download one of those from?

    B 1 Reply Last reply Oct 5, 2016, 6:24 PM Reply Quote 0
    • B Offline
      bibi @KirAsh4
      last edited by Oct 5, 2016, 6:24 PM

      @KirAsh4 I agree with your point of view - safer and cheaper. I will have a look on those hubs later… I red somewhere that not all of them are efficient with rpi3.

      1 Reply Last reply Reply Quote 0
      • K Offline
        KirAsh4 Moderator
        last edited by Oct 5, 2016, 6:50 PM

        That’s correct, and that’s because of their power outputs. You have to find out that powered and that has a nice high output. I actually run one of my rpis off of an Anker wall charger that outputs up to 2.4Amps per port.

        A Life? Cool! Where can I download one of those from?

        B 1 Reply Last reply Oct 5, 2016, 7:33 PM Reply Quote 0
        • B Offline
          bibi @KirAsh4
          last edited by Oct 5, 2016, 7:33 PM

          @KirAsh4 ya a wall powered one will surely supply nice output power. If you want to share your Anker model - feel free :p

          B 1 Reply Last reply Oct 6, 2016, 12:18 PM Reply Quote 0
          • K Offline
            KirAsh4 Moderator
            last edited by KirAsh4 Oct 5, 2016, 8:11 PM Oct 5, 2016, 7:40 PM

            Lots and lots of them on Amazon. It really depends on your application. I have both 2, 4, and 5 ports around the house for various things. Hit Amazon, and search for ‘Anker wall charger’. Then look at their outputs and do the math. For example, if you see a 4-port, 40W, the calculation is:

            40W / 4 ports = 10W per port
            Each port supplies 5V, so 10W / 5V = 2Amps per port.

            Read the descriptions on them. I generally only buy those that can supply upwards of 2.4Amps on at least 1 port (and 2Amps on the others). But they have models that can supply that much on all ports as well.

            A Life? Cool! Where can I download one of those from?

            B 1 Reply Last reply Oct 5, 2016, 8:10 PM Reply Quote 0
            • B Offline
              bibi @KirAsh4
              last edited by Oct 5, 2016, 8:10 PM

              @KirAsh4 I think it’s rather 40W / 4 ports = 10W per port :-) but no prob I got the math ;-) I will have a look and again and let you know in case. Thx so much for your time! Appreciated.

              1 Reply Last reply Reply Quote 0
              • K Offline
                KirAsh4 Moderator
                last edited by Oct 5, 2016, 8:11 PM

                Yep, mistyped … corrected it now.

                A Life? Cool! Where can I download one of those from?

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                • B Offline
                  bhepler Module Developer @bibi
                  last edited by Oct 6, 2016, 12:18 PM

                  @bibi said in Can the usb port from a monitor power the rpi3?:

                  If you want to share your Anker model - feel free

                  I’m using a NextGadget 20W desk charger. Plenty of power, but I just discovered that the cord is a bit short.

                  If you’re looking for 2.4 Amps per port, you might want to look at Skiva.

                  B 1 Reply Last reply Oct 6, 2016, 12:55 PM Reply Quote 0
                  • B Offline
                    bibi @bhepler
                    last edited by Oct 6, 2016, 12:55 PM

                    @bhepler thx you very much for sharing! :) I will have a look

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