Redstone Repeater

This article is about the block. For repeater circuits, see Redstone circuits/Transmission § Repeater. For other uses, see Redstone.

Redstone Repeater

Java Edition

Bedrock Edition

Java Edition

Bedrock Edition

Java Edition

Bedrock Edition

Java Edition

Bedrock Edition

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Renewable	Yes
Stackable	Yes (64)
Tool	Any tool
Blast resistance	0
Hardness	0
Luminous	No
Transparent	Yes
Waterloggable	JE: No BE: Yes
Flammable	No
Catches fire from lava	No
Map color	0 NONE
Note block instrument	Default (Harp)

A redstone repeater is a block that produces a full-strength redstone signal from its front while its back is powered, with four toggleable delay settings. It can also be locked into its current power state by directly powering its side with another repeater or a redstone comparator.

Obtaining

Breaking

A redstone repeater can be broken instantly using any tool, or without a tool, and drops itself as an item. To remove a redstone repeater, mine it.

Block	Redstone Repeater
Hardness	0
Breaking time (secs)
Default	10.05 (JE) 0.05 (BE)

Legend

• incorrect tool, drops nothing
• correct tool, drops nothing or something other than the block itself
• correct tool, drops the block itself
• italicized can be instant mined

A redstone repeater is removed and drops as an item if:

• its attachment block is moved, removed, or destroyed;
• water or lava flows into its space;‌^{[Java Edition only]}
• a piston tries to push it or moves a block into its space.

Natural generation

A single redstone repeater is generated naturally in each jungle pyramid.

8-13 redstone repeaters can also generate in ancient cities.

Crafting

Ingredients	Crafting recipe
Redstone Torch + Redstone Dust + Stone

Usage

A redstone repeater can be used in four different ways: to "repeat" redstone signals back to full strength, delay signals, prevent signals moving backward, or to "lock" signals in one state.

A repeater can be placed only on top of full blocks (dirt, stone, etc.), on top of upside-down slabs, upside-down stairs, furnaces, and glass. In Bedrock Edition, a repeater can also be placed on fences and stone walls. They can also be placed on some transparent blocks. See Opacity/Placement for more information. To place a repeater, use the Place Block control.

A redstone repeater has a front and back – the arrow on the top points to the repeater's front. A repeater also has two small redstone torches on its top – the color of the torches indicates whether its output is on (dark red when off, bright red when on) and the distance between them indicates the delay the repeater adds to the signal transmission.

A repeater is 0.125 (¹⁄₈) blocks high.

Signal transmission

A repeater transmits signals only from its back to its front, but its behavior can be modified from the side (see signal locking, below).

A redstone repeater can be powered by any of the following components at its back:

• an active power component (redstone torch, lever, block of redstone, etc.)
• powered redstone dust
• a powered redstone comparator or another powered redstone repeater facing the repeater
• a powered conductive block (including any conductive mechanism components, such as dispensers, redstone lamps, etc.)

A redstone repeater can power any of the following components at its front:

• redstone dust
• a redstone comparator or another redstone repeater facing away from the repeater
• any conductive block (including any conductive mechanism components)

A redstone repeater can activate any mechanism component it is facing.

A conductive block powered by a redstone repeater is called "strongly-powered" (as opposed to a conductive block "weakly-powered" by redstone dust). A strongly-powered conductive block can power adjacent redstone dust, as well as other redstone components.

Signal repeating

A redstone repeater can "repeat" a redstone signal, boosting it back up to power level 15.

Redstone signals have a maximum power level of 15 and that level drops by 1 for every block of redstone dust the signal travels through. If a signal must travel through more than 15 blocks of redstone dust, a redstone repeater can be used to boost the signal back up to full strength. An extra two blocks of distance can be achieved by placing conductive blocks before and after the repeater.

While redstone repeaters can allow signals to travel great distances, each always adds some delay to the transmission since the minimum amount of delay is 2 game ticks (0.1 seconds).

Signal delay

When initially placed, a redstone repeater has a delay of 2 game ticks (0.1 seconds).

A repeater's delay can be modified by using the Use Item control. Each use increases the repeater's delay by two ticks, to a maximum of eight, then reverting back to two ticks. Longer delays can be made with multiple repeaters – for example, a repeater set to '8' and another to '2' provides a half-second delay (8 × 0.05s + 2 × 0.05s = 0.5s).

A repeater set to a delay of four to eight ticks increases the length of any shorter on-pulse to match the length of the repeater's delay, and suppresses any shorter off-pulse. For example, a repeater set to a 4-tick delay changes a 0-tick‌^{[Java Edition only]}, 1-tick, 2-tick, or 3-tick on-pulse into a 4-tick on-pulse, and does not allow through any off-pulse shorter than 4 ticks (except for the caveats below). In Java Edition, a repeater set to a delay of two ticks can also extend the length of any 0-tick or 1-tick pulse.

Although a repeater cannot be set to have a delay of zero, in Java Edition, instant repeater circuits are possible (circuits that repeat a signal with no delay).

In Java Edition, when and whether a repeater turns on or off in response to changes in the input signal is affected by scheduled ticks. Upon receiving a block update, an unpowered repeater receiving a signal will schedule a tick to turn on. Immediately before turning on, and subsequently whenever it is updated, the repeater will check whether it is still receiving a signal, and if not, it will schedule a tick to turn off. Once the tick runs, the repeater will only turn off if it is still not receiving a signal, and will otherwise stay on at least until the next scheduled tick, if any. However, only one tick can be scheduled at a time, and any attempt to schedule a tick while one already exists is completely ignored. As a consequence, even a very short off-pulse can cause a repeater to turn off, if it happens to occur at the same time as a previously scheduled tick to turn off. A locked repeater completely ignores all block updates and scheduled ticks.

Signal direction

A redstone repeater acts as a diode – it allows redstone signals through in one direction (unlike redstone dust or conductive blocks that can transmit redstone signals in any direction).

A diode can be used to protect a redstone circuit from redstone signals feeding back into the circuit from its output, or can be used to isolate one part of a circuit from another.

Signal locking

A redstone repeater can be "locked" by another powered redstone repeater facing its side. When locked, the repeater does not change its output (whether powered or unpowered), no matter what the input does. When the side repeater turns back off, the repeater returns to its normal behavior.

A repeater can also be locked by a powered redstone comparator facing its side. This offers additional possibilities for locking signals because a comparator's output can be affected from 3 sides as well as by containers.

If a repeater is locked again too quickly after unlocking (e.g. the lock is controlled by a fast clock circuit), or the lock and the input are changed only on the same tick (e.g. because they're fed by the same clock and both repeaters have the same delay), the repeater does not switch states.

Sounds

Java Edition:

stone sound type
Sound	Closed captions	Source	Description	Identifier	Translation key	Volume	Pitch	Attenuation distance
	​Block broken	Blocks	Once the block has broken	block.stone.break	subtitles.block.generic.break​	1.0	0.8	16
	​Block placed​[until: JE 26.4]	Blocks	When the block is placed	block.stone.place	subtitles.block.generic.place​	1.0	0.8	16
	​Block breaking	Blocks	While the block is in the process of being broken	block.stone.hit	subtitles.block.generic.hit​	0.25	0.5	16
	​Something falls on a block	Entity-Dependent	Falling on the block with fall damage	block.stone.fall	subtitles.block.generic.fall​	0.5	0.75	16
	​Footsteps	Entity-Dependent	Walking on the block	block.stone.step	subtitles.block.generic.footsteps​	0.15	1.0	16

Bedrock Edition:

wood sound type
Sound	Closed captions	Source	Description	Identifier	Translation key	Volume	Pitch
	​Block broken	Blocks	Once the block has broken	dig.wood	subtitles.block.generic.break​	1.0	0.8–1.0
	​Block placed	Blocks	When the block is placed	place.wood	subtitles.block.generic.place​	1.0	0.8
	​Axe strips	Blocks	When an axe strips a log or wood block [sound 1]	use.wood	subtitles.block.generic.hit​	1.0	0.8
	​Block breaking	Blocks	While the block is in the process of being broken	hit.wood	subtitles.block.generic.hit​	0.23	0.5
	​Footsteps	Players	Falling on the block with fall damage	fall.wood	subtitles.block.generic.footsteps​	0.4	1.0
	​Footsteps	Players	Walking on the block	step.wood	subtitles.block.generic.footsteps​	0.3	1.0
	​Footsteps	Blocks	Jumping from the block	jump.wood	subtitles.block.generic.footsteps​	0.12	1.0
	​Footsteps	Blocks	Falling on the block without fall damage	land.wood	subtitles.block.generic.footsteps​	0.18	1.0

Data values

ID

Java Edition:

Name	Identifier	Form	Translation key
Redstone Repeater	repeater	Block & Item	block.minecraft.repeater

Bedrock Edition:

Redstone Repeater	Identifier	Numeric ID	Form	Item ID[i 1]	Translation key
Unpowered Repeater	unpowered_repeater	93	Block & Ungiveable Item[i 2]	Identical[i 3]	tile.unpowered_repeater.name
Powered Repeater	powered_repeater	94	Block & Ungiveable Item[i 2]	Identical[i 3]	tile.powered_repeater.name
Redstone Repeater	repeater	419	Item	—	item.repeater.name

Block states

Java Edition:

Bedrock Edition:

Videos

History

Java Edition

Java Edition Beta
1.3							Added redstone repeaters.
							Originally, the four possible settings were "1, 2, 5 and 7",[1] but Jeb decided to change the settings to "1, 2, 3, and 4".[2]
							The particles when breaking redstone repeaters erroneously use the pumpkin top texture.
1.6			Test Build 3				The breaking particles of redstone repeaters now use the stone slab top texture, even though none of the elements on the model use it.
1.7							The side texture of redstone repeaters has been changed to the previous bottom part of the texture.
							The breaking particles of redstone repeaters have been changed to a mix of stone slab, unlit redstone torch and unpowered repeater top when unpowered and a stone slab, lit redstone torch and powered repeater when powered.
							Redstone dust now automatically connects to the input of a redstone repeater. Previously, it needed to be specifically pointed toward the repeater like with other blocks.
1.7.3							The breaking particles of redstone repeaters have been changed to simply an unlit redstone torch when unpowered and a lit redstone torch when powered.
Java Edition
1.0.0			RC1				Redstone dust now visually connects to the output of redstone repeaters, though this does not change its behavior.
1.3.1			12w22a				Redstone repeaters now naturally generate inside jungle temples.
							Repeaters are no longer being stuck when loading the chunks they are in.
			1.3				The texture of redstone repeater items have been changed.
1.4.2			12w42a				The top texture of redstone repeaters has been changed.
							Added repeater locking to redstone repeaters. Interestingly, the smallest face of the bedrock cuboid's texture changes depending on the delay, but the other two faces remain the same. When/if this changed is unknown.
1.5			13w02a				The side textures of redstone repeaters have been changed to use the top texture of stone slabs.
1.7.2							The UV of all blocks is broken on certain sides as a result of MC-37106.
1.8			14w04a				If a redstone repeater is set to render as the block inside of a minecart via commands or map editing, it now appears as this (previously it would be entirely invisible).
			14w06a				Repeaters no longer produce block light when powered.
			14w10a				Torches on repeaters no longer have protruding features.
							The torches underneath redstone repeaters have been shortened, which has changed the underside textures from to .
							The "in minecart" appearance is now different.
			14w10b				Repeater torches now have protruding features again.[3]
			14w25a				The torches on redstone repeaters are now affected by directional shading.
							The breaking particle of redstone repeaters has been changed once again and now matches the top texture of redstone repeaters.
1.9			15w46a				Mobs no longer spawn on redstone repeaters.
1.13			17w47a				Redstone repeaters now render their underside, which has changed their undersides from to .
1.14			18w43a				The textures of redstone repeaters have been changed.
			18w50a				As the texture of bedrock has been changed, the textures of locked redstone repeaters have also been changed.
			19w12b				Redstone repeaters can now be placed on glass, ice, glowstone and sea lanterns.
1.19			22w13a				Redstone repeaters now generate in ancient cities.
1.20.2			23w33a				Redstone repeaters now use stone sounds instead of wood sounds.[4]
1.21.2			24w33a				The powered models for redstone repeaters have changed.

Bedrock Edition

Pocket Edition Alpha
v0.14.0			build 1				Added redstone repeaters.
Bedrock Edition
1.2.0			beta 1.2.0.2				Redstone repeaters now render their underside, which has changed their undersides from to .
1.10.0			beta 1.10.0.3				The textures of redstone repeaters have been changed.

Legacy Console Edition

Legacy Console Edition
Xbox 360	Xbox One	PS3	PS4	PS Vita	Wii U	Switch
TU1	CU1	1.00	1.00	1.00	Patch 1	1.0.1	Added redstone repeaters.
TU19	CU7	1.12	1.12	1.12			Added repeater locking to redstone repeaters.
TU57	CU49	1.57	1.56	1.56	Patch 27	1.0.7	Redstone Repeaters can now be crafted from granite, andesite, diorite and their polished variants.
			1.90				The textures of redstone repeaters have been changed.

New Nintendo 3DS Edition

New Nintendo 3DS Edition
0.1.0							Added redstone repeaters and repeater locking.

Data history

Java Edition

Bedrock Edition

Issues

Issues relating to "Repeater*" are maintained on the bug tracker. Issues should be reported and viewed there.

Trivia

• The crafting recipe and appearance of redstone repeaters may be a reference to double torch repeaters, which was a common way to repeat signals before repeaters were introduced.

Gallery

Renders

Java Edition

Bedrock Edition

Contraption

• 
  A redstone clock formed from a redstone torch and a repeater
• 
  A redstone clock formed from two repeaters

Screenshots

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• 
• 
• 
  Crossing redstone wires using repeaters

In other media

• 
  MCRedstoneSim diagram of a two-way repeater

References