Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-240765

observer and piston create feedback loop

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • 21w44a
    • Windows 10, Java Version 21w44a
    • Unconfirmed

      EDIT: not a bug - as stated in the comments this is intended behavior
      "_When some other block update happens next to the piston, it will "wake up" and react to the change. By forming a feedback loop, where the state of the piston controls the state of its power source, it becomes the sensor of a simple BUD switch" - Source Unofficial Minecraft Wiki

       

       

       

      when an observer is placed on top of an piston (observer facing downwards, piston facing away) and an conductive block on top of the observer, the piston starts to loop very fast, when done with redstone dust even faster

      this does NOT happen if the observer is placed horizontally next to, or below the piston

      the output of the observer should not be able to power the observed block through itself, creating a feedback loop

      since the output of the observer is 1 block away from the piston, there should be an airgap for the redstone signal

      What I expected to happen was...:
      Piston should not be affected from observer when being observed

      What actually happened was...:
      Piston started to extend and retract very fast in a loop

      Steps to Reproduce (WITH REDSTONE DUST):
      1. Place an Observer FACE DOWN
      2. Place Redstone Dust on top (output)
      3. Place Piston from below the observer, on face of the observer
      4. Piston starts looping very fast

      Steps to Reproduce (WITH CONDUCTIVE BLOCK):
      1. Place piston
      2. Place observer ON TOP facing the side of the piston
      3. Place redstone or conductive block on top on the output of observer
      4. power the piston to extend it
      5. depower the piston to retract it
      6. Piston starts looping fast

       

       

       

        1. 2021-11-06_05.06.27-1.png
          990 kB
          Peter R
        2. 2021-11-06_05.19.47.png
          1.11 MB
          Peter R
        3. 2021-11-06_05.27.23.png
          902 kB
          Peter R

            Unassigned Unassigned
            Tammerat Peter R
            Votes:
            0 Vote for this issue
            Watchers:
            0 Start watching this issue

              Created:
              Updated:
              Resolved: