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Redstone Repeater

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

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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	0.05

Legend

• drops nothing
• drops something other than the block itself
• 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;‌
• a piston tries to push it or moves a block into its space.

Natural generation

A redstone repeater generated in the jungle temple's hidden room.

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

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

Crafting

Ingredients	[hide]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).

Different ways to power a repeater

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 1 redstone tick (0.1 seconds, barring lag).

Signal delay

When initially placed, a redstone repeater has a delay of one redstone tick (equivalent to two game ticks, or 0.1 seconds barring lag).

A repeater's delay can be modified by using the Use Item control. Each use increases the repeater's delay by one redstone tick, to a maximum of four redstone ticks, then back to one redstone tick. Longer delays can be made with multiple repeaters – for example, a repeater set to 'four' and another to 'one' provides a half-second delay (0.4s + 0.1s = 0.5s).

A repeater set to a delay of two to four redstone ticks increases the length of any shorter on-pulse to match the length of the repeater's delay, and suppress any shorter off-pulse. For example, a repeater set to a 4-tick delay changes a 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.

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).

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

The left repeater has been locked in an unpowered output state by the right repeater.

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:

[hide] v t e stone sound type
Sound	Subtitles	Source	Description	Resource location	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	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:

[hide] v t e wood sound type
Sound	Source	Description	Resource location	Volume	Pitch
	Blocks	Once the block has broken	dig.wood	1.0	0.8-1.0
	Blocks	When the block is placed	dig.wood	1.0	0.8
	Blocks	While the block is in the process of being broken	hit.wood	0.23	0.5
	Players	Falling on the block with fall damage	fall.wood	0.4	1.0
	Players	Walking on the block	step.wood	0.3	1.0
	Blocks	Jumping from the block	jump.wood	0.12	1.0
	Blocks	Falling on the block without fall damage	land.wood	0.18	1.0

Data values

ID

Java Edition:

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

Bedrock Edition:

Redstone Repeater	Identifier	Numeric ID	Form	Item ID	[hide]Translation key
Unpowered block	unpowered_repeater	93	Block & Ungiveable Item	Identical	—
Powered block	powered_repeater	94	Block & Ungiveable Item	Identical	—
Item	repeater	419	Item	—	item.repeater.name

Block states

Java Edition:

Name	Default value	Allowed values	[hide]Description
delay	1	1 2 3 4	The redstone repeater's delay in redstone ticks.
facing	north	east north south west	The direction from the output side to the input side of a repeater. The opposite from the direction the player faces while placing the repeater.
locked	false	false true	True if the repeater is currently locked.
powered	false	false true	If the redstone repeater is lit.

Bedrock Edition:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	[hide]Description
minecraft:cardinal_direction	Not Supported	south	east north south west	Unsupported	The direction from the output side to the input side of a repeater. The opposite from the direction the player faces while placing the repeater.
repeater_delay	0x4 0x8	0	0 1 2 3	0 1 2 3	The redstone repeater's delay in redstone ticks minus 1.

Video

Note: This Video is from Java Edition 1.5 so the video does not tell that Redstone repeaters can now be placed on glass, ice, glowstone and sea lanterns.

History

There is an associated page listing all historical changes related to the appearance and/or sounds associated with this block in further detail than below; see /Asset history.

[hide]Java Edition Beta
1.3							Added redstone repeaters.
							Originally, the four possible settings were "1, 2, 5 and 7", but Jeb decided to change the settings to "1, 2, 3, and 4".
							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.
[hide]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.
			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.
1.8			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 .
			14w10b				Repeater torches now have protruding features again.
			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.
1.13			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.
1.21.2			24w33a				The powered models for redstone repeaters have changed.
[hide]Pocket Edition Alpha
v0.14.0			build 1				Added redstone repeaters.
[hide]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.
[hide]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.
[hide]New Nintendo 3DS Edition
0.1.0							Added redstone repeaters and repeater locking.

Data history

[hide]Java Edition
1.13			17w47a				All 3 IDs for the redstone repeater have been merged into 1 ID: repeater.
							Added powered block state to redstone repeaters.
							Prior to The Flattening, these blocks' numeral IDs were 93 and 94, and the item's 356.
[hide]Bedrock Edition
1.20.30			Preview 1.20.30.20				Redstone repeaters now use the minecraft:cardinal_direction block state instead of direction.

Issues

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

Java Edition

• MC-54711 – Quick pulses get lost in some repeater/comparator setups
• MC-207411 – Sculk sensors do not detect when rails, redstone wire, repeaters or comparators are broken due to them losing support
• MC-9955 – Repeater locks incorrectly pulse under certain conditions (due to inconsistent block updates)
• MC-54567 – Inconsistency between repeaters/activated torches and buttons/levers/player-placed torches/redstone blocks/pistons activating redstone devices
• MC-58119 – The "facing" block state of repeaters, comparators, and glazed terracotta doesn't match the direction they're facing
• MC-99916 – Cloned repeater re-triggers command block
• MC-169919 – Redstone repeater signal becomes random after chunk reloading
• MC-214621 – Sculk sensors do not detect repeater delay switching
• MC-144105 – Repeater freezes 'on' when delay is set to 2 or 4
• MC-158505 – Repeater gives Output from Observer when it shouldn´t
• And 4 other open issues.

Bedrock Edition

• MCPE-33202 – Back faces of redstone torches on redstone repeaters and comparators do not render
• MCPE-58151 – Repeaters Don't Save Pending Tick Information
• MCPE-89921 – Observers dont activate redstone dust and repeaters when it is pushed by a sticky piston and that sticky piston gets powered by another observer
• MCPE-165629 – Redstone comparator and repeater breaking and placing sound is incorrect

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

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Bedrock Edition

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Contraption

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  A redstone clock formed from a redstone torch and a repeater.

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  A redstone clock formed from two repeaters.

Screenshots

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  Crossing redstone wires using repeaters.

In other media

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  MCRedstoneSim diagram of a two-way repeater.