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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

    5" Jumpy screen?

    Scheduled Pinned Locked Moved Help and Support
    jumpylcdscreen
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    • monstermadeofmanM
      monstermadeofman @josephchrzempiec
      last edited by

      @josephchrzempiec What powerboost are you using might I ask?

      Not all those who wander are lost

      1 Reply Last reply Reply Quote 0
      • josephchrzempiecJ
        josephchrzempiec
        last edited by

        Here it is

        I'm wondering something If there is some noise on the line it's self that is causing this problem?

        monstermadeofmanM 1 Reply Last reply Reply Quote 0
        • monstermadeofmanM
          monstermadeofman @josephchrzempiec
          last edited by

          @josephchrzempiec

          So what are you using to charge the battery? I'm assuming you have a regulator for battery charging? Because all that is, is a step up converter.

          Not all those who wander are lost

          josephchrzempiecJ 1 Reply Last reply Reply Quote 0
          • josephchrzempiecJ
            josephchrzempiec @monstermadeofman
            last edited by

            @monstermadeofman I have a 5v 4a input is my power supply. to 3.7v 1a output charging module.

            1 Reply Last reply Reply Quote 0
            • monstermadeofmanM
              monstermadeofman
              last edited by

              Might i suggest making this alot easier by putting it all into one module as I feel you are over complicating the entire thing.

              alt text

              http://www.banggood.com/37V-Liion-Battery-Mini-USB-To-USB-A-Power-Apply-Module-p-928948.html?p=9B1915347037201311DI

              This is used quite alot in GBZ builds. It let's you charge and play at the same time. It also has the powerboost built into the board so no need for that.

              the other option while alot more expensive is the Adafruit Powerboost 1000c

              alt text

              Just google it. So many places sell them.

              Not all those who wander are lost

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              • cyperghostC
                cyperghost @josephchrzempiec
                last edited by

                @monstermadeofman
                I don't want to stop your helping hand but ....

                @josephchrzempiec said in 5" Jumpy screen?:

                Hello thank you all for the reply back. It came with a rear view car camera and i tried that. Surely a clear perfect picture no jumping around. It's only in the raspberry pi it's doing this.

                monstermadeofmanM 1 Reply Last reply Reply Quote 0
                • monstermadeofmanM
                  monstermadeofman @cyperghost
                  last edited by

                  @cyperghost

                  Yeah I think the issue at this point man is how he's supplying power. Seems a bit convoluted and is probably a power issue if it's ok when just using the camera with it.

                  Not all those who wander are lost

                  cyperghostC 1 Reply Last reply Reply Quote 1
                  • josephchrzempiecJ
                    josephchrzempiec
                    last edited by

                    I want to try something Let me isolate the raspberry pi from the LCD and power it up on a different Power supply and see what happens.

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                    • cyperghostC
                      cyperghost @monstermadeofman
                      last edited by cyperghost

                      @monstermadeofman Do you think the power regulator is messing the composite signal? That could be possible.... So it should work with separated power supplies.
                      But it could also be a bad composite connection or a bad config.

                      josephchrzempiecJ 1 Reply Last reply Reply Quote 0
                      • monstermadeofmanM
                        monstermadeofman
                        last edited by

                        That's what I was thinking. I'm using a composite screen with with a powerboost 1000C and I'm not getting an issue. But I think the fact he's using individual parts that might not like working together or could be wired incorrectly.

                        Not all those who wander are lost

                        cyperghostC 1 Reply Last reply Reply Quote 0
                        • josephchrzempiecJ
                          josephchrzempiec @cyperghost
                          last edited by

                          @cyperghost And there goes that problem I isolate the screen from the Raspberry pi and just Power the LCD with it's only 5v 2a Power supply and it confirms my thoughts there is Noise on the lines. The LCD comes on with no problem nice and clear and clean.

                          cyperghostC 1 Reply Last reply Reply Quote 0
                          • cyperghostC
                            cyperghost @monstermadeofman
                            last edited by cyperghost

                            @monstermadeofman
                            We will see in the next posting of @josephchrzempiec. Be prepared :)

                            EDIT: Respect you were right :)

                            1 Reply Last reply Reply Quote 0
                            • cyperghostC
                              cyperghost @josephchrzempiec
                              last edited by cyperghost

                              @josephchrzempiec
                              Nice it works :)
                              Do you use the same grounding signal for all?
                              Please then graduate @monstermadeofman

                              1 Reply Last reply Reply Quote 0
                              • josephchrzempiecJ
                                josephchrzempiec
                                last edited by

                                Someone Shake my head off my shoulders please LOL

                                Yes i still keep a common ground between both power supplies bypassing the buck boost converters. As i looked online A lot of these Buck boost converters Because there old design That they are notorious For noise on the lines. I do have a power boost 1000c from adafruit But i do not have other buck boost converter like in your I'm i will look into getting one. Meanwhile i think with a little help from filtering caps might for now Help clear up some of the Screaming noise from the lines.

                                1 Reply Last reply Reply Quote 0
                                • monstermadeofmanM
                                  monstermadeofman
                                  last edited by

                                  Dude you don't need another power converter.

                                  The Powerboost is the converter! It steps up 3.7V to 5.2V.

                                  Can you take a pic of your wiring my friend? Just so we can see how you are powering everything

                                  Not all those who wander are lost

                                  josephchrzempiecJ 1 Reply Last reply Reply Quote 0
                                  • josephchrzempiecJ
                                    josephchrzempiec @monstermadeofman
                                    last edited by

                                    @monstermadeofman That might be a problem so much wiring you won't be able to see what is going where. There are 30 wires are more going form the game controllers to the raspberry pi and to the LCD and power it's so tangled up it's not even funny.

                                    monstermadeofmanM 1 Reply Last reply Reply Quote 0
                                    • monstermadeofmanM
                                      monstermadeofman @josephchrzempiec
                                      last edited by

                                      @josephchrzempiec

                                      Christ man. Are you using a power strip to supply/distribute power to everyhting?

                                      Not all those who wander are lost

                                      josephchrzempiecJ 1 Reply Last reply Reply Quote 0
                                      • josephchrzempiecJ
                                        josephchrzempiec @monstermadeofman
                                        last edited by

                                        @monstermadeofman LOL no man I just not got around to cleaning up the wires yes. That was the next thing to do. After getting it powered up and testing it.

                                        monstermadeofmanM 1 Reply Last reply Reply Quote 0
                                        • monstermadeofmanM
                                          monstermadeofman @josephchrzempiec
                                          last edited by

                                          @josephchrzempiec

                                          I would suggest a powerstrip before powering anything.

                                          They are simple enough to make or you can order one from OSH Park

                                          alt text

                                          https://oshpark.com/shared_projects/tQqjx16m

                                          I've got a simple one I made that I use for testing power purposes

                                          Not all those who wander are lost

                                          josephchrzempiecJ 2 Replies Last reply Reply Quote 0
                                          • josephchrzempiecJ
                                            josephchrzempiec @monstermadeofman
                                            last edited by

                                            @monstermadeofman That is on my next thing to do as soon as i can.

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