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    Solved Duet 3 6HC Turn off USB power (5V)

    Duet Hardware and wiring
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    • Razani
      Razani last edited by

      Hi,
      I have a pick and place machine controlled via a Duet 3 6HC.
      I have a classic AC switch to turn the machine on/off.
      The Duet is powered via a 24V source and at the same time commands are sent directly via USB.
      My problem is that when I turn off the machine with the switch, the duet still runs on 5V from the USB. Is there a way to turn off the 5V USB power for the duet so I don't have to unplug the USB from the computer when I turn it off. I don't want to use the method of cutting the 5V wire in the USB cable, so I'm wondering if there is some other, more elegant way.
      Thank you very much.

      dc42 1 Reply Last reply Reply Quote 0
      • Andrey
        Andrey last edited by

        This post is deleted!
        1 Reply Last reply Reply Quote 0
        • dc42
          dc42 administrators @Razani last edited by

          @Razani you would need to remove the diode on the 6HC that feeds USB power to the Duet 5V rail.

          Duet WiFi hardware designer and firmware engineer
          Please do not ask me for Duet support via PM or email, use the forum
          http://www.escher3d.com, https://miscsolutions.wordpress.com

          Razani 1 Reply Last reply Reply Quote 0
          • Razani
            Razani @dc42 last edited by

            Thank you for your reply.
            @dc42 But do you mean a classic rectifier diode or an LED? And if so, which diode should it be? Around the USB port I see diodes marked D23 (LED), D32, D10.
            I have Duet version v1.01a.
            Well thank you.

            dc42 Andrey 2 Replies Last reply Reply Quote 0
            • dc42
              dc42 administrators @Razani last edited by

              @Razani you can find the schematic at https://github.com/Duet3D/Duet3-Mainboard-6HC.

              Duet WiFi hardware designer and firmware engineer
              Please do not ask me for Duet support via PM or email, use the forum
              http://www.escher3d.com, https://miscsolutions.wordpress.com

              Razani 1 Reply Last reply Reply Quote 0
              • Andrey
                Andrey @Razani last edited by

                @Razani

                I beg your pardon for first misleading answer...

                Screenshot 2023-09-19 at 13.29.52.png

                Looks like it depends on your 5V power source anyway (D10 for external, D32 for internal regulator).

                1 Reply Last reply Reply Quote 1
                • Razani
                  Razani @dc42 last edited by

                  Problem is solved,
                  I removed diodes D10 and D32.
                  Now the USB no longer supplies the Duet with five volts and the USB communication works properly.
                  Thanks for the help.

                  1 Reply Last reply Reply Quote 2
                  • Topic has been marked as a question  dc42 dc42 
                  • Topic has been marked as solved  dc42 dc42 
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