COMPARATOR CLOCK
A comparator in subtract mode creates a decrementing signal loop. The signal decreases by the side input each cycle, wrapping around for a repeating pattern.
When to Use
Analog signal patterns, musical note block sequences, complex timing patterns.
Materials
Comparator Clock materials, and what they cost to craft
The parts list for Comparator Clock works out to 13 crafting ingredients once you make everything yourself, led by 6 Stone, 5 Redstone Torch and 1 Quartz, with 1 other kind behind them.
The Comparator Clock leans on Redstone Comparator, Redstone Dust and Redstone Repeater, and every one of them is covered in full on its own component page.
| Goes into Comparator Clock | Count in one Comparator Clock | Price of a single one |
|---|---|---|
 Redstone Comparator | 1 | 3 Redstone Torch, 3 Stone, 1 Quartz |
 Redstone Repeater | 1 | 3 Stone, 2 Redstone Torch, 1 Redstone |
Comparator Clock written out in raw ingredients
6 Stone
5 Redstone Torch
1 Quartz
1 Redstone
Every Comparator Clock figure in this table is read off the Java Edition 26.2 recipes.
Comparator Clock, in one place: what it is and what it does
A comparator in subtract mode creates a decrementing signal loop. The signal decreases by the side input each cycle, wrapping around for a repeating pattern.
As a clock it produces a repeating on/off pulse on its own, driving anything that needs to fire at a steady rhythm.
Where you tend to meet it: analog signal patterns, musical note block sequences, complex timing patterns. All 5 of the build steps below are written for vanilla Java Edition 26.2.
How the Comparator Clock works: the redstone mechanics
A comparator in subtract mode fed back into its own side input decrements the signal each cycle, stepping down through strength values rather than producing a clean square wave. The repeater in the loop sets how fast each step happens.
The parts list is short and every single entry on it matters: 1 Redstone Comparator, redstone Dust, 1 Redstone Repeater, and solid blocks. Swap one of them out for something else and the Comparator Clock stops behaving as it should.
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 the Comparator Clock
- 1Place a comparator in subtract mode (front torch lit).
- 2Loop the output back to the side input using dust and a repeater.
- 3Provide an initial signal to the back input.
- 4The comparator subtracts the looped signal, creating a stepping pattern.
- 5Adjust the repeater delay and initial signal to change the pattern.
- 6Power it up and watch one full cycle: confirm it pulses at the rhythm you expected before wiring it into a larger contraption.
Jobs the Comparator Clock does well
- ▸Analog signal patterns, musical note block sequences, complex timing patterns.
- ▸Fading comparator clock (signal strength decreases each tick), a variant suited to particular space or timing needs.
- ▸Ring counter (multiple comparators in a loop), a variant suited to particular space or timing needs.
- ▸Analog wave generator (produces sawtooth or triangle waves), a variant suited to particular space or timing needs.
Tips & common mistakes
- !Its output is an analog staircase, not a steady on/off pulse, so buffer it through a repeater if downstream gear expects a clean signal.
- !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.
Comparator Clock FAQ: the questions people ask
What is a Comparator Clock used for?
A Comparator Clock is used for analog signal patterns, musical note block sequences, complex timing patterns. 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 Comparator Clock?
You need 1 Redstone Comparator, redstone Dust, 1 Redstone Repeater, and solid blocks. Place a comparator in subtract mode (front torch lit).
How does a Comparator Clock work?
A comparator in subtract mode fed back into its own side input decrements the signal each cycle, stepping down through strength values rather than producing a clean square wave. The repeater in the loop sets how fast each step happens.
Are there different versions of the Comparator Clock?
Yes, common variants include fading comparator clock (signal strength decreases each tick), ring counter (multiple comparators in a loop), and analog wave generator (produces sawtooth or triangle waves). Pick the one that fits your available space and timing requirements.
Circuits that share parts with Comparator Clock
Comparator Clock does not stand on its own. 5 other circuit pages are tied to it:
