Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    How to get fans from the Duet 2 wifi expansion pins?

    Scheduled Pinned Locked Moved
    Duet Hardware and wiring
    3
    4
    156
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Sphyloidundefined
      Sphyloid
      last edited by

      This is something I find most vexing, it seems like such a simple task at first.

      Perhaps the Duex expansion boards have logic of their own that creates the new fans and feeds a signal digitally to minimize pin use.

      If this is the case, then it would spell the failure of my current goal as I would have to resort to a fan splitter running the two part cooling fans in parallel, and giving the two hotend the remaining two stock conditional fan headers.

      1 Reply Last reply Reply Quote 0
      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        You cannot run a fan directly from the expansion header.

        Z-Bot CoreXY Build | Thingiverse Profile

        1 Reply Last reply Reply Quote 1
        • dc42undefined
          dc42 administrators
          last edited by dc42

          The DueX uses a I2C expander chip + mosfets to drive the additional fans, and a 74HCT02 chip + mosfets to drive the additional heater heater outputs.

          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

          Sphyloidundefined 1 Reply Last reply Reply Quote 1
          • Sphyloidundefined
            Sphyloid @dc42
            last edited by Sphyloid

            This post is deleted!
            1 Reply Last reply Reply Quote 0
            • First post
              Last post
            Unless otherwise noted, all forum content is licensed under CC-BY-SA