REPEATER CLOCK
A loop of repeaters that circulates a signal pulse endlessly. The clock period equals the sum of all repeater delays in the loop. Simple to build and adjust.
When to Use
Timed dispensers, automatic farms, pulsing redstone lamps, periodic pistons.
Materials
- ▸2+ Redstone Repeaters
- ▸Redstone Dust
- ▸Solid blocks
Overview: what the Repeater Clock is and does
A loop of repeaters that circulates a signal pulse endlessly. The clock period equals the sum of all repeater delays in the loop. Simple to build and adjust.
As a clock it produces a repeating on/off pulse on its own, driving anything that needs to fire at a steady rhythm.
In practice it is used for timed dispensers, automatic farms, pulsing redstone lamps, periodic pistons. The build below targets vanilla Java Edition 1.21.
How it works: the redstone mechanics
Its period is the sum of every repeater's delay around the loop, so two repeaters at 1 tick each give a 4-tick full cycle (on for 2 ticks, off for 2). Adding repeaters or raising their delay lengthens the period in clean tick-sized steps.
It is assembled from 2+ Redstone Repeaters, redstone Dust, and solid blocks, and each of those parts plays a specific timing or logic role in the circuit rather than being interchangeable filler.
Because this is a clock circuit, the thing to watch as you build is the period — the total tick delay around the loop sets how fast it runs.
How to build it
- 1Place 2 or more repeaters in a loop, all facing the same direction around the circuit.
- 2Connect them with redstone dust between each repeater.
- 3Set each repeater to your desired delay (1-4 ticks each).
- 4Give the circuit a pulse from a button or lever to start the clock.
- 5The signal will loop continuously. Period = sum of all repeater delays.
- 6Power it up and watch one full cycle: confirm it pulses at the rhythm you expected before wiring it into a larger contraption.
Uses & applications
- ▸Timed dispensers, automatic farms, pulsing redstone lamps, periodic pistons.
- ▸2-repeater clock (fastest stable: 2+ ticks per cycle) — a variant suited to particular space or timing needs.
- ▸4-repeater clock (adjustable period from 4-16 ticks) — a variant suited to particular space or timing needs.
- ▸Hopper clock (use hoppers to create very long periods) — a variant suited to particular space or timing needs.
- ▸Torch-based clock (alternating torches for 2-tick clock) — a variant suited to particular space or timing needs.
Tips & common mistakes
- !Drive it too fast and the repeaters cannot keep up, so for sub-2-tick speeds use an observer clock instead of stacking repeaters.
- !If the clock will not be running constantly, add a lever in the loop so you can switch it off and spare the server the block updates.
- !Remember that bare redstone dust loses 1 signal strength per block, so insert a repeater before any run exceeds 15 blocks inside this circuit.
Repeater Clock FAQ
What is a Repeater Clock used for?
A Repeater Clock is used for timed dispensers, automatic farms, pulsing redstone lamps, periodic pistons. As a clock it produces a repeating on/off pulse on its own, driving anything that needs to fire at a steady rhythm.
What do you need to build a Repeater Clock?
You need 2+ Redstone Repeaters, redstone Dust, and solid blocks. Place 2 or more repeaters in a loop, all facing the same direction around the circuit.
How does a Repeater Clock work?
Its period is the sum of every repeater's delay around the loop, so two repeaters at 1 tick each give a 4-tick full cycle (on for 2 ticks, off for 2). Adding repeaters or raising their delay lengthens the period in clean tick-sized steps.
Are there different versions of the Repeater Clock?
Yes — common variants include 2-repeater clock (fastest stable: 2+ ticks per cycle), 4-repeater clock (adjustable period from 4-16 ticks), hopper clock (use hoppers to create very long periods), and torch-based clock (alternating torches for 2-tick clock). Pick the one that fits your available space and timing requirements.
How do I change the speed of a repeater clock?
Right-click the repeaters to raise or lower their tick delay, or add and remove repeaters from the loop. The clock period equals the total of all repeater delays around the loop, so more total delay means a slower clock.