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Redstonery › Circuits › Repeater clock
Clock circuit

Repeater clock

Measure one complete repeating cycle.

5 × 3 footprint1 layer12 blocksTested in 4 rotationsJava Edition 26.2
Open in the simulatorBuild it in the game

Layout

Layer 0 (on the floor)
stone at x 0, z 0redstone torch (on a wall) [facing=east] at x 1, z 0redstone dust at x 2, z 0repeater [facing=west, delay=4] at x 3, z 0redstone dust at x 4, z 0redstone dust at x 4, z 1redstone dust at x 4, z 2redstone dust at x 3, z 2redstone dust at x 2, z 2redstone dust at x 1, z 2redstone dust at x 0, z 2redstone dust at x 0, z 1
redstone dustredstone torchrepeater or comparatorsolid blockarrows point where a device sends its output; north is up

How it works

A loop through a torch inverter and a 4-tick repeater: the torch flips every 10 game ticks.

  1. A delayed signal returns to the torch’s supporting block and changes the torch.
  2. The return path then changes again, creating alternating high and low intervals.

Timing

Measured at the output: a period of 20 game ticks (1.0 s), 10 ticks high and 10 low, repeating for the 600 ticks the test watches.

Inputs and outputs

  • Outputthe dust after the torch (x 2, y 0, z 0)

Blocks you need

9 × redstone dust, 1 × stone, 1 × redstone torch (on a wall), 1 × repeater.

Build it in the game: 12 commands

Relative to where you stand, with x running east and z running south. Paste one line at a time into chat, or into a chain of command blocks. The block art is the game's own; the layout is what the page above shows.

setblock ~0 ~0 ~0 minecraft:stone
setblock ~1 ~0 ~0 minecraft:redstone_wall_torch[facing=east]
setblock ~2 ~0 ~0 minecraft:redstone_wire
setblock ~3 ~0 ~0 minecraft:repeater[facing=west,delay=4]
setblock ~4 ~0 ~0 minecraft:redstone_wire
setblock ~4 ~0 ~1 minecraft:redstone_wire
setblock ~4 ~0 ~2 minecraft:redstone_wire
setblock ~3 ~0 ~2 minecraft:redstone_wire
setblock ~2 ~0 ~2 minecraft:redstone_wire
setblock ~1 ~0 ~2 minecraft:redstone_wire
setblock ~0 ~0 ~2 minecraft:redstone_wire
setblock ~0 ~0 ~1 minecraft:redstone_wire