Redstone Repeater

Renewable	Yes
Stackable	Yes (64)
Tool	Any tool
Blast resistance	0
Hardness	0
Luminant	No
Transparent	Yes
Flammable	No
Catches fire from lava	No

A redstone repeater is a block used in redstone circuits to "repeat" redstone signals back to full strength, delay signals, prevent signals moving backwards, or to "lock" signals in one state.

Obtaining

A redstone repeater can be obtained by crafting, by looting jungle temples, or by breaking a previously-placed repeater.

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.

A redstone repeater is removed and drops itself 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

File:Redstone Repeater naturally generated.png

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

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

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 backwards, or to "lock" signals in one state.

A repeater can be placed only on top of opaque 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).

File:Redstone Torch Power.png

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 opaque block (including any opaque 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 opaque block (including any opaque mechanism components)

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

An opaque block powered by a redstone repeater is called "strongly-powered" (as opposed to an opaque block "weakly-powered" by redstone dust). A strongly-powered opaque 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 solid opaque 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, instant repeater circuits are possible (circuits that repeat a signal with no delay).

In Bedrock Edition, the first repeater have a delay of zero but the repeater is still showing 1-tick^{[more information needed]}

Signal direction

A redstone repeater acts as a "diode" – it allows redstone signals through in one direction (unlike redstone dust or opaque 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

File:Latch.png

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

150px150px

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:

Sound	Subtitle	Source	Description	Namespaced ID	Translation key	Volume	Pitch	Attenuation distance
File:Wood dig1.oggFile:Wood dig2.oggFile:Wood dig3.oggFile:Wood dig4.ogg	Block broken	Blocks	Once the block has broken	`block.wood.break`	`subtitles.block.generic.break`	1.0	0.8	16
File:Wood hit1.oggFile:Wood hit2.oggFile:Wood hit3.oggFile:Wood hit4.oggFile:Wood hit5.oggFile:Wood hit6.ogg	None^{[sound 1]}	Blocks	Falling on the block with fall damage	`block.wood.fall`	None^{[sound 1]}	0.5	0.75	16
File:Wood hit1.oggFile:Wood hit2.oggFile:Wood hit3.oggFile:Wood hit4.oggFile:Wood hit5.oggFile:Wood hit6.ogg	Block breaking	Blocks	While the block is in the process of being broken	`block.wood.hit`	`subtitles.block.generic.hit`	0.25	0.5	16
File:Wood dig1.oggFile:Wood dig2.oggFile:Wood dig3.oggFile:Wood dig4.ogg	Block placed	Blocks	When the block is placed	`block.wood.place`	`subtitles.block.generic.place`	1.0	0.8	16
File:Wood hit1.oggFile:Wood hit2.oggFile:Wood hit3.oggFile:Wood hit4.oggFile:Wood hit5.oggFile:Wood hit6.ogg	Footsteps	Blocks	Walking on the block	`block.wood.step`	`subtitles.block.generic.footsteps`	0.15	1.0	16

↑ ^1.0 ^1.1 MC-177082

Bedrock Edition:

Sound	Source	Description	Namespaced ID	Volume	Pitch
?	Blocks	Once the block has broken	`dig.wood`	1.0	0.8
?	Blocks	Falling on the block with fall damage	`fall.wood`	0.4	1.0
?	Blocks	While the block is in the process of being broken	`hit.wood`	0.23	0.5
?	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
?	Blocks	Walking on the block	`step.wood`	0.3	1.0
?	Blocks	When the block is placed	`use.wood`	1.0	0.8

Data values

ID

Java Edition:

Name	Namespaced ID	Form	Translation key
Redstone Repeater	`repeater`	Block & Item	`block.minecraft.repeater`

Bedrock Edition:

Redstone Repeater	Namespaced ID	Numeric ID	Form	Translation key
Unpowered block	`unpowered_repeater`	`93`	Block	`tile.unpowered_repeater.name`
Powered block	`powered_repeater`	`94`	Block	`tile.powered_repeater.name`
Item	`repeater`	`356`	Item	`item.repeater.name`

Metadata

In Bedrock Edition, redstone repeaters block use the following data values:

Template:/DV

Block states

Template:/BS

Video

History

For a more in-depth breakdown of changes to repeater textures and models, including a set of renders for each state combination, see /Asset history

Java Edition Beta
1.3					32px 32px 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 particle when breaking redstone repeaters is currently a smooth stone slab top texture, even though none of the elements on the model use it.
1.7					32px The side texture of redstone repeaters has been changed to the previous bottom part of the texture.
Java Edition
?					The breaking particle of restone repeaters has been changed to an unlit redstone torch when unpowered and a lit redstone torch when powered.
1.3.1		12w22a			Redstone repeaters now naturally generate inside jungle temples.
1.3.1		1.3			32px The texture of redstone repeater items have been changed.
1.4.2		12w42a			32px The top texture of redstone repeaters has now been changed.
1.4.2		12w42a			32px 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			32px The side textures of redstone repeaters have been changed to use the top texture of stone slabs.
?					The breaking particle of redstone repeaters has been changed once again and now matches the top texture of redstone repeaters.
1.8		?			Repeaters no longer produce block light when powered.
		14w10a			32px Torches on repeaters now no longer have protruding features.
		14w10a			The torches underneath redstone repeaters have now been shortened, which has changed the underside textures from 32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px to 32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px.
		14w10b			32px Repeater torches now have protruding features again.^[3]
		?			32px The torches on redstone repeaters are now affected by ambeint occlusion.
1.13		17w47a			All 3 IDs for the redstone repeater have now been merged into 1 ID: `repeater`.
					Added powered block state to redstone repeaters.
					Redstone repeaters now render their underside, which has changed their undersides from 32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px to 32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px.
					Prior to The Flattening, these blocks' numeral IDs were 93 and 94, and the item's 356.
1.14		18w43a			32px 32px 32px 32px 32px The textures of redstone repeaters have now been changed.
		18w50a			32px 32px As the texture of bedrock has been changed, the textures of locked redstone repeaters have also now been changed.
		19w12b			Redstone repeaters can now be placed on glass, ice, glowstone and sea lanterns.
Pocket Edition Alpha
v0.14.0		build 1			32px 32px 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 32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px to 32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px32px.
1.10.0		beta 1.10.0.3			32px 32px 32px The textures of redstone repeaters have now been changed.
Legacy Console Edition
TU1	CU1	1.0	Patch 1	1.0.1	32px^[verify] 32px Added redstone repeaters.
TU19	CU7	1.12	Patch 1	1.0.1	32px^[verify] Added repeater locking to redstone repeaters.
		1.90			32px^[verify] 32px The textures of redstone repeaters have now been changed.
New Nintendo 3DS Edition
0.1.0					32px^[verify] 32px Added redstone repeaters and repeater locking.