I built a small clock like the example at the beginning of this video. However, the pulse redstone is triggered each time the cobblestone blocks move over it, instead of just when the glass block goes over it. This is causing a pulse on every cycle of the pistons, rather than on every cycle of the glass block.

What changes do I need to make to the design in order to make this clock work? Should I consider a different design?

  • 1
    This particular design was broken by the 1.5.2 update.
    – fredley
    May 23, 2013 at 14:45
  • 1
    You might also want to look at this question, which also deals with long duration timers.
    – MBraedley
    May 23, 2013 at 16:35

1 Answer 1


Version 1.5 included a whole load of new redstone mechanics, and as such the underlying redstone system changed a fair bit - breaking some devices.

What you have posted is an example. There are plenty of other clocks you can make that work in newer versions, try one of those.

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