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    External Power - What is possible?

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    • world101W
      world101 @moelski
      last edited by

      @moelski 在 External Power - What is possible? 中说:

      So there must be any suiteable solution to power the M5 from the 2x15 connector. Or somewhere else inside the M5 Stack.

      There is. It’s called the
      m5stack battery module. 850mAh of internal power. If you need more than that, it will have to be custom.

      M 1 Reply Last reply Reply Quote 0
      • M
        moelski @world101
        last edited by

        @world101 在 External Power - What is possible? 中说:

        m5stack battery module. 850mAh of internal power. If you need more than that, it will have to be custom.

        Hi !
        I know there is a battery pack and I got two of them. But this is not always a solution. There are projects where you can't stack a lot of moduls on top of each other. And as said ... Using USB as power is very ugly and space consuming.

        If you need more than that, it will have to be custom.

        Correct. And what I want to know is which custom solutions are available.
        Or to be more precise ... Which kind of power solutions are available without using the Battery module or an USB connection and which kind of drawbacks have those solutions?

        I can't beleave that I'm the only guy how has those "problems".

        regards
        Dominik

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        • loborisL
          loboris
          last edited by

          M5Stack power circuit is designed in a way that you can use only a Li-Po battery (other than USB power) as external power source.
          For all other solutions you have to modify the PCB.
          If you look at the schematic you can see that the external 5V source could be added at several places, but in all cases you have to cut some PCB traces.
          The simplest method should be to attach the external 5V to VIN_USB, no trace cutting is needed, but you should not connect USB cable at the same time the external 5V is connected.

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          • loborisL
            loboris @moelski
            last edited by loboris

            @moelski 在 External Power - What is possible? 中说:

            It looks very ugly to use a USB Connector

            If you use external power, some kind of connector must be used.
            You could use USB cable with right angle connector, like this one, I don't think it looks ugly.
            You can remove the USB-A connector on the other side, and attach whatever power source you have.

            cable

            1 Reply Last reply Reply Quote 1
            • M
              moelski
              last edited by

              Hi,
              cutting traces on the PCB is always a bad idea I think ...

              But connecting a 5V source to the 5V connection on the 2x15 connector should be ok, or not? If there is no battery connected we don need the IP5306?

              you should not connect USB cable at the same time the external 5V is connected

              That's correct but this is a compromise I can live with.

              regards Dominik

              loborisL 1 Reply Last reply Reply Quote 0
              • loborisL
                loboris @moelski
                last edited by loboris

                @moelski 在 External Power - What is possible? 中说:

                But connecting a 5V source to the 5V connection on the 2x15 connector should be ok, or not? If there is no battery connected we don need the IP5306?

                5V connection on the 2x15 connector is the output from IP5306 VOUT pin (5V Boost output pin), so I don't think it is wise to connect external 5V to it.

                1 Reply Last reply Reply Quote 0
                • M
                  moelski
                  last edited by

                  @loboris 在 External Power - What is possible? 中说:

                  5V connection on the 2x15 connector is the output from IP5306 VOUT pin

                  Well if there is no battery connected and no USB cable attached ... Why should this be a problem?
                  I would assume that the IP5306 has an internal protection for reverse current.

                  loborisL 1 Reply Last reply Reply Quote 0
                  • ajb2k3A
                    ajb2k3
                    last edited by

                    You are aware that there are 2 battery connection on the M5?
                    1 is in the 2x15 connection, one is on the actual main pcb.

                    UIFlow, so easy an adult can learn it!
                    If I don't know it, be patient!
                    I've ether not learned it or am too drunk to remember it!
                    Author of the WIP UIFlow Handbook!
                    M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

                    1 Reply Last reply Reply Quote 0
                    • M
                      moelski
                      last edited by

                      @ajb2k3 在 External Power - What is possible? 中说:

                      You are aware that there are 2 battery connection on the M5?
                      1 is in the 2x15 connection, one is on the actual main pcb.

                      Yes I saw that. I think that both directly connected to the VBat connection, correct?!
                      0_1540452267316_VBAt Connect.png

                      1 Reply Last reply Reply Quote 0
                      • loborisL
                        loboris @moelski
                        last edited by

                        @moelski 在 External Power - What is possible? 中说:

                        I would assume that the IP5306 has an internal protection for reverse current.

                        It is not specified in the IP5306 datasheet.
                        You can test it and report the results.

                        1 Reply Last reply Reply Quote 0
                        • B
                          b1063n
                          last edited by

                          So, did anyone find a solution. I was about to buy it, but then when I look at the documentation for the power supply voltage I cannot find it! Documentation is quite poor I must add.

                          I do not need battery operated solution, and the USB power is super ugly and inconvenient!

                          I need to use external 5V power supply connected to pins inside the board in a professional manner (no pcb hacking). Is this not possible? I cannot believe it!!

                          ajb2k3A 1 Reply Last reply Reply Quote 0
                          • ajb2k3A
                            ajb2k3 @b1063n
                            last edited by ajb2k3

                            @b1063n said in External Power - What is possible?:

                            So, did anyone find a solution. I was about to buy it, but then when I look at the documentation for the power supply voltage I cannot find it! Documentation is quite poor I must add.

                            I do not need battery operated solution, and the USB power is super ugly and inconvenient!

                            I need to use external 5V power supply connected to pins inside the board in a professional manner (no pcb hacking). Is this not possible? I cannot believe it!!

                            Yes it is possible as the Stackable modules provide internal power to M5Stack cores. (Sorry been working on my books and documenting units with demos this weekend.)

                            The documents I have, show that each stackable module has its own voltage regulator that delivers 5 volts to pin 28 of the internal bus (+5V).
                            If you look at the Proto module you will see that these pins are marked ready for you.
                            https://docs.m5stack.com/#/en/module/proto

                            UIFlow, so easy an adult can learn it!
                            If I don't know it, be patient!
                            I've ether not learned it or am too drunk to remember it!
                            Author of the WIP UIFlow Handbook!
                            M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

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