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Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

Undervolt problem?

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undervolt
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  • Y
    YoshiFan501
    last edited by 19 Dec 2016, 20:05

    0_1482177824409_IMG_20161219_135525.jpg

    Hello. I've been having some trouble with retropie on my pi 3. Almost every time it runs, it says it undervolts.

    I have a 5V 3A Power supply that came with this Media Pi Plus case. I was wondering if it's the extra stuff in the case that is causing an undervolt or the software in the pi itself. Any help would be great.

    R 1 Reply Last reply 19 Dec 2016, 20:15 Reply Quote 0
    • R
      rbaker @YoshiFan501
      last edited by 19 Dec 2016, 20:15

      @YoshiFan501 A pi 3 requires 5 V @ 2.5A which is more than the 1.8A required by the Pi2 which that box was for? Max current draw from usb is 1.2A, what else is connected? A portable HDD would draw about 250mA at a guess.

      Y 1 Reply Last reply 19 Dec 2016, 20:27 Reply Quote 0
      • Y
        YoshiFan501 @rbaker
        last edited by 19 Dec 2016, 20:27

        @rbaker all else that is usually connected is one USB controller

        1 Reply Last reply Reply Quote 0
        • F
          FlyingTomahawk
          last edited by 20 Dec 2016, 00:03

          Don't mean to hijack this topic but I have also that under volt issue. Doing a search in google shows that some guys seem to have that issue even they use 5V2.5A ac adapters.
          Really curious to see what answers gonna show up here. I got my Raspberry Pi 3 about 2 weeks ago and I always thought that lighting bolt is some sort of loading icon. lol
          Looks like every time at start up or when something is loading that bolt icon shows up.
          Some say that the USB cable must be also of good quality to be able to transfer those 2.5A to the RPi3 others claim that cheap china ac adapters say that are 5V2.5A but they actually don't output that amount.

          What AC adapter exactly are you using? Got an image of it?

          1 Reply Last reply Reply Quote 0
          • Y
            YoshiFan501
            last edited by 20 Dec 2016, 18:21

            its a generic 3000 mA 5v barrel jack

            1 Reply Last reply Reply Quote 0
            • F
              FlyingTomahawk
              last edited by 20 Dec 2016, 20:57

              So you are using some sort of adapter cable to be able to connect it to the Pi?
              Something like this?
              If yes does that cable transfer those needed 2.4-2.5A power to the Pi?
              I had an under voltage issue that I was able to solve by buying the right 2.4A micro USB cable.

              Guess the only way to find out is to measure your A output or swap to a official Raspberry Pi power supply or something equivalent.

              1 Reply Last reply Reply Quote 0
              • Y
                YoshiFan501
                last edited by 21 Dec 2016, 16:59

                im using a media pi plus. it has a converter inside

                1 Reply Last reply Reply Quote 0
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