According to this article

1-clocks and 3-clocks are possible to make but they will "burn out" because of their speed, which makes them unstable. Redundancy can be used to maintain a 1-clock, even as the torches burn out; the result is the so-called "Rapid Pulsar"

Whenever I make a 1 clock, it pulses for a bit, then burns out and never comes back on. How do I implement Redundancy which will keep it pulsing?

  • I believe what you quoted explains why your problem occurs (instability due to speed) and the solution (redundancy). Perhaps you should elaborate. Commented Feb 28, 2011 at 21:43
  • Yes, sorry. I meant to ask how to implement Redundancy to keep it pulsing.
    – Entity
    Commented Feb 28, 2011 at 21:46
  • Remember that even if you have a redundant clock, if it's unstable and you try to drive some additional circuitry with it, it will fail.
    – Nick T
    Commented Mar 1, 2011 at 17:16

3 Answers 3


A rapid pulsar works by basically having four 1-clocks, when one burns out another takes over. You can't have a 1-clock by itself without it burning out. The largest stable clock is a 5-clock.


  • But... how do you wire them all up so that another takes over when one burns out?
    – Entity
    Commented Feb 28, 2011 at 21:51
  • 1
    See designs A and F: minecraftwiki.net/wiki/Redstone_circuits#Clock_generators Commented Feb 28, 2011 at 22:10
  • I've built design A, but it always burns out...
    – Entity
    Commented Feb 28, 2011 at 22:43
  • 1
    The shadowed block means there should be a block above it. Each of those torches needs a block on top of it.
    – Kevin Yap
    Commented Mar 1, 2011 at 2:02

Using repeaters, which do not burn out, it is possible to make a one-clock:

enter image description here

Just inject a one-tick pulse from a pulse generator to set it going.


Using a solid block(ie dirt), a redstone torch, a redstone repeater and three redstone dust you can make a one clock

r= redstone dust
p= redstone repeater
t= redstone torch
b= solid block

By setting the repeater to three ticks, you get an effective pulser

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