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    No green 3.3volt LED on mainboard

    Duet Hardware and wiring
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    • gzcwnk
      gzcwnk last edited by

      https://duet3d.com/wiki/Duet_WiFi_wiring_diagrams

      "Yes, the Duet series generally tolerates having +3.3V shorted to ground due to mis-wired endstops, whereas mis-wired endstop switches is one of two common causes of blown regulators on Arduino/RAMPS. Had you known where to look, you would have noticed that the green LED indicating +3.3V power was not lit."

      what green LED? I have no such LED lit on my duetwifi, never seen one.

      duetwifi works fine…......

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      • dc42
        dc42 administrators last edited by

        At the left hand end of the edge of the Duet WiFi with the SD card and USB connector, there are 5 LEDs: E1 heat (red), E0 heat (red), VIN (blue), +5V (red), and +3.3V (green). The +3.3V LED can be rather dim on white pre-production boards.

        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

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        • gzcwnk
          gzcwnk last edited by

          I have a blue batch5 board. Yeah I can see the writing with a magnifying glass but it isnt lit. I pulled the end stops, no difference. Board seems to work fine as far as I can tell.

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          • gzcwnk
            gzcwnk last edited by

            Tested end stops that are NO. When I close them the LED at each stepper plug lights so there is 3.3v there, or some sort of voltage anyway.

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            • gzcwnk
              gzcwnk last edited by

              I actually dont recollect ever seeing one so I'll assume for now it is a dud LED. Is there anything else to look at?

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              • gzcwnk
                gzcwnk last edited by

                Found a pic of when I first turned it on with nothing connected, it had a green LED then, the Q is then why not now. The regulator must be OK or the duetwifi wouldnt work?

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                • dc42
                  dc42 administrators last edited by

                  Yes, the 3.3V supply must be present if the board is responding. I suspect that either the LED has been damaged, or one end of it is not soldered down properly.

                  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

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                  • gzcwnk
                    gzcwnk last edited by

                    One of the things that made me hesitate on buying the duetwifi was the possibility I'd destroy it. So I ummd and ahh'd for weeks, but "jetguy's" recommendation sealed it. I mean a complete with mega and screen cheap ramps 1.4 is $35US v 150US for the duetwifi, expensive if I use it as a fuse for a first time try.

                    😞

                    and yes i know a cheap ramps is utter crap. Kind of strange really, as an engineer I buy good tools. The best I can afford, yet people insist on buying the equiv of tools from the $2 shop and expect great results.

                    Ive only printed two calibration tests so far but if the finish I am getting with the same g-code is a good indication the Duetwifi was worth every penny. Congrats on it.

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                    • gzcwnk
                      gzcwnk last edited by

                      I guess I can carefully put a voltmeter in there as one end should have 3.3volts?

                      I assume I could be brave and de-solder the Led…..

                      What I did with the original setup was buy 4 tiny voltmeters to monitor this stuff trying to trace a fault, probably OTT now.

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                      • T3P3Tony
                        T3P3Tony administrators last edited by

                        @gzcwnk:

                        what green LED? I have no such LED lit on my duetwifi, never seen one.
                        .

                        I know you now which LEd we are referring to now, however for other reference I have added to the documentation:
                        https://duet3d.com/wiki/Hardware_overview#LED_indications

                        www.duet3d.com

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                        • uk25
                          uk25 last edited by

                          I have lost one too ((
                          Is it necessary to remove the faulty LED or i can leave it as is?

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                          • dc42
                            dc42 administrators last edited by

                            You can leave it as it is.

                            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

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                            • uk25
                              uk25 last edited by

                              @dc42:

                              You can leave it as it is.

                              Thanks David!

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