REDSTONE REPEATER
Extends, delays, and isolates redstone signals. Refreshes signal back to 15 regardless of input strength. Adjustable delay from 1 to 4 ticks. Can be locked by powering its side.
Crafting Recipe
3 Stone + 2 Redstone Torches + 1 Redstone Dust → 1 Redstone Repeater
Signal Behavior
Input
InputRedstone signal from back
Output
OutputSignal strength 15 from front (refreshed)
Max Signal Strength
Max Signal Strength15
Delay
1-4 redstone ticks (configurable)
Modes
- 1-tick delay
- 2-tick delay
- 3-tick delay
- 4-tick delay
- Locked mode
Overview: what the Redstone Repeater is and does
Extends, delays, and isolates redstone signals. Refreshes signal back to 15 regardless of input strength. Adjustable delay from 1 to 4 ticks. Can be locked by powering its side.
As a transmission component its job is to carry, refresh, or reshape a signal as it moves between other blocks. It is the signal booster, one-way valve, and adjustable delay line rolled into one block, and it underpins nearly every clock and timed door.
The Redstone Repeater was added to Minecraft in Beta 1.3 and everything described here reflects its behaviour in Java Edition 1.21.
How it works: the redstone mechanics
On the input side, redstone signal from back. On the output side, signal strength 15 from front (refreshed).
It only passes signal from back to front, refreshing whatever it receives back up to a clean 15, so it both isolates and extends a line. Right-clicking cycles its delay through 1, 2, 3, and 4 redstone ticks. Powering its side from another repeater or comparator locks it, freezing its current output as a 1-bit memory.
Timing-wise, factor in 1-4 redstone ticks (configurable) when you wire it into a sequenced circuit.
It can output a maximum signal strength of 15, which travels 15 blocks through bare redstone dust before fading to nothing.
It operates in the following modes: 1-tick delay, 2-tick delay, 3-tick delay, 4-tick delay, and locked mode.
How to set it up
- 1Craft the Redstone Repeater: 3 Stone + 2 Redstone Torches + 1 Redstone Dust → 1 Redstone Repeater.
- 2Decide where the signal needs to start or land, then place the Redstone Repeater against a solid surface so it can feed the rest of your circuit.
- 3Wire dust into its input side and read the refreshed or modified signal off its output side, keeping its facing in mind.
- 4Test in a creative-mode plot first: trigger the input and confirm the Redstone Repeater behaves exactly as the timing above predicts before committing it to a survival build.
Uses & applications
- ▸Signal extension beyond 15 blocks
- ▸Precise timing delays
- ▸Signal isolation (one-way)
- ▸Locking mechanisms
- ▸Clock circuits
Tips & common mistakes
- !Only transmits in one direction (back to front)
- !Locked repeater holds its state
- !Right-click cycles through 1-4 tick delays
- !Its one-way nature trips up beginners constantly — face the arrows in the direction you want the signal to flow or nothing comes out.
Redstone Repeater FAQ
What is the Redstone Repeater used for in Minecraft redstone?
The Redstone Repeater is most often used for signal extension beyond 15 blocks, precise timing delays, signal isolation (one-way), and locking mechanisms. As a transmission component its job is to carry, refresh, or reshape a signal as it moves between other blocks.
What signal strength does the Redstone Repeater output?
Signal strength 15 from front (refreshed). Its maximum signal strength is 15.
How do you craft the Redstone Repeater?
3 Stone + 2 Redstone Torches + 1 Redstone Dust → 1 Redstone Repeater. It was introduced in Beta 1.3.
Does the Redstone Repeater add any delay to a circuit?
Yes — 1-4 redstone ticks (configurable). Account for that timing when chaining it with other components, especially in clocks and fast doors.
How much delay can a redstone repeater add?
Each repeater adds 1 to 4 redstone ticks of delay, set by right-clicking it (1 tick = 0.1s, so the range is 0.1s to 0.4s per repeater). Chain several in a row to build up longer delays.