Minecraft:Redstone Repeater: Difference between revisions
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A '''redstone repeater''' is a [[Minecraft:block]] that produces a full-strength [[Minecraft:redstone]] signal from its front while its back is powered, with four {{Control|use|text=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. | A '''redstone repeater''' is a [[Minecraft:block]] that produces a full-strength [[Minecraft:redstone]] signal from its front while its back is powered, with four {{Control|use|text=toggleable}} delay settings. It can also be locked into its current power state by directly powering its side with another repeater or a [[Minecraft:redstone comparator]]. | ||
== Obtaining == | == Obtaining == | ||
=== Breaking === | === Breaking === | ||
A redstone repeater can be broken instantly using any [[Minecraft:tool]], or without a tool, and drops itself as an item. To remove a redstone repeater, {{control|mine}} it. | A redstone repeater can be [[Minecraft:instant mining|broken instantly]] using any [[Minecraft:tool]], or without a tool, and drops itself as an item. To remove a redstone repeater, {{control|mine}} it. | ||
{{breaking row|Redstone Repeater|horizontal=1}} | {{breaking row|Redstone Repeater|horizontal=1}} | ||
A redstone repeater is removed and drops as an item if: | A redstone repeater is removed and drops as an item if: | ||
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=== Natural generation === | === Natural generation === | ||
[[File:Redstone Repeater naturally generated.png|thumb|A redstone repeater generated in the jungle temple's hidden room.]] | [[File:Redstone Repeater naturally generated.png|thumb|A redstone repeater generated in the jungle temple's hidden room.]] | ||
A single redstone repeater is generated naturally in each jungle pyramid. | A single redstone repeater is generated naturally in each [[Minecraft:jungle pyramid]]. | ||
8-13 redstone repeaters can also generate in ancient cities. | 8-13 redstone repeaters can also generate in [[Minecraft:ancient cities]]. | ||
=== Crafting === | === Crafting === | ||
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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 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 [[Minecraft:slab]]s, upside-down [[Minecraft:stairs]], furnaces, and glass. {{IN|be}}, 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 {{control|Place Block}} control. | A repeater can be placed only on top of [[Minecraft:full blocks]] (dirt, stone, etc.), on top of upside-down [[Minecraft:slab]]s, upside-down [[Minecraft:stairs]], furnaces, and glass. {{IN|be}}, a repeater can also be placed on fences and stone walls. They can also be placed on some transparent blocks. See [[Minecraft:Opacity/Placement]] for more information. To place a repeater, use the {{control|Place Block}} [[Minecraft: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 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. | ||
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[[File:Redstone Torch Power.png|Different ways to power a repeater|thumb]] | [[File:Redstone Torch Power.png|Different ways to power a repeater|thumb]] | ||
A redstone repeater can be powered by any of the following components at its back: | 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.) | * an active [[Minecraft:power component]] (redstone torch, lever, block of redstone, etc.) | ||
* powered redstone dust | * powered [[Minecraft:redstone dust]] | ||
* a powered redstone comparator or another powered redstone repeater facing the repeater | * a powered [[Minecraft:redstone comparator]] or another powered redstone repeater facing the repeater | ||
* a powered conductive block (including any conductive mechanism | * a powered [[Minecraft:conductive]] block (including any conductive [[Minecraft:mechanism component]]s, such as [[Minecraft:dispenser]]s, [[Minecraft:redstone lamp]]s, etc.) | ||
A redstone repeater can power any of the following components at its front: | A redstone repeater can power any of the following components at its front: | ||
* redstone dust | * redstone dust | ||
* a redstone comparator or another redstone repeater facing away from the repeater | * a redstone comparator or another redstone repeater facing away from the repeater | ||
* any conductive block (including any conductive mechanism | * any [[Minecraft:conductive]] block (including any conductive [[Minecraft:mechanism component]]s) | ||
A redstone repeater can activate any mechanism component it is facing. | A redstone repeater can activate any [[Minecraft: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. | A [[Minecraft: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 === | === Signal repeating === | ||
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A redstone repeater can "repeat" a [[Minecraft:redstone]] signal, boosting it back up to power level 15. | A redstone repeater can "repeat" a [[Minecraft: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 [[Minecraft:block]]s 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. | Redstone signals have a maximum power level of 15 and that level drops by 1 for every block of [[Minecraft:redstone dust]] the signal travels through. If a signal must travel through more than 15 [[Minecraft:block]]s 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 [[Minecraft: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 {{convert|2|game tick|second}}. | 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 {{convert|2|game tick|second}}. | ||
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|} | |} | ||
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{{only|java}}, 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}}, a repeater set to a delay of two ticks can also extend the length of any 0-tick or 1-tick pulse. | A repeater set to a delay of four to eight ticks increases the length of any shorter [[Minecraft:Pulse circuit#Pulses|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 [[Minecraft:zero tick|0-tick]]{{only|java}}, 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}}, 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}}, instant repeater circuits are possible (circuits that repeat a signal with no delay). | Although a repeater cannot be set to have a delay of zero, {{In|java}}, [[Minecraft:Transmission circuit#Instant repeater|instant repeater circuits]] are possible (circuits that repeat a signal with no delay). | ||
{{IN|java}}, when and whether a repeater turns on or off in reponse to changes in the input signal is affected by scheduled | {{IN|java}}, when and whether a repeater turns on or off in reponse to changes in the input signal is affected by [[Minecraft:scheduled tick]]s. Upon receiving a [[Minecraft:Block update#Neighbor changed update|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. | ||
=== {{anchor|diode}} Signal direction === | === {{anchor|diode}} Signal direction === | ||
{{see also| Mechanics/Redstone/Transmission circuit#Diode}} | {{see also| Mechanics/Redstone/Transmission circuit#Diode}} | ||
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 redstone repeater acts as a diode – it allows redstone signals through in one direction (unlike [[Minecraft:redstone dust]] or [[Minecraft: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. | A diode can be used to protect a [[Minecraft: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. | ||
=== {{anchor|lock}} Signal locking === | === {{anchor|lock}} Signal locking === | ||
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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 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. | A repeater can also be locked by a powered [[Minecraft: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. | 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. | ||
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{{el|je}}: | {{el|je}}: | ||
{{bst|delay|1|1,2,3,4|The redstone repeater's delay in redstone | {{bst|delay|1|1,2,3,4|The redstone repeater's delay in [[Minecraft:redstone tick]]s (double game ticks).}} | ||
{{bst|facing|north|east,north,south,west|The direction from the ''output'' side to the ''input'' side of a repeater.<br>The opposite from the direction the player faces while placing the repeater.}} | {{bst|facing|north|east,north,south,west|The direction from the ''output'' side to the ''input'' side of a repeater.<br>The opposite from the direction the player faces while placing the repeater.}} | ||
{{bst|locked|false|false,true|True if the repeater is currently locked.}} | {{bst|locked|false|false,true|True if the repeater is currently locked.}} | ||
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== Videos == | == Videos == | ||
{{Video note|The first video is from Java Edition 1.5, so it does not tell that redstone repeaters can now be placed on glass, ice, glowstone and sea lanterns.}} | {{Video note|The first video is from [[Minecraft:Java Edition 1.5]], so it does not tell that redstone repeaters can now be placed on glass, ice, glowstone and sea lanterns.}} | ||
<div style="text-align:center">{{yt|0Ij_qMLiRzE}}{{yt|yY_e_bVMHgk}}</div> | <div style="text-align:center">{{yt|0Ij_qMLiRzE}}{{yt|yY_e_bVMHgk}}</div> | ||
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|{{HistoryLine|java beta}} | |{{HistoryLine|java beta}} | ||
|{{HistoryLine||1.3|[[File:Redstone Repeater (S) JE1.png|32px]] [[File:Redstone Repeater (item) JE1.png|32px]] Added redstone repeaters. | |{{HistoryLine||1.3|[[File:Redstone Repeater (S) JE1.png|32px]] [[File:Redstone Repeater (item) JE1.png|32px]] Added redstone repeaters. | ||
|Originally, the four possible settings were "1, 2, 5 and 7",<ref>{{tweet|jeb_|33888465502339073|@aza1810 You right-click to toggle through 4 possible settings, which currently is 1,2,5 and 7|February 5, 2011}}</ref> but Jeb decided to change the settings to "1, 2, 3, and 4".<ref>http://www.reddit.com/r/Minecraft/comments/fmdtp/teammojang_redstone_repeater_video/c1gzrn6</ref> | |Originally, the four possible settings were "1, 2, 5 and 7",<ref>{{tweet|jeb_|33888465502339073|@aza1810 You right-click to toggle through 4 possible settings, which currently is 1,2,5 and 7|February 5, 2011}}</ref> but [[Minecraft:Jeb]] decided to change the settings to "1, 2, 3, and 4".<ref>http://www.reddit.com/r/Minecraft/comments/fmdtp/teammojang_redstone_repeater_video/c1gzrn6</ref> | ||
|The particles when breaking redstone repeaters erroneously use the [[Minecraft:pumpkin]] top texture.}} | |The particles when [[Minecraft:breaking]] redstone repeaters erroneously use the [[Minecraft:pumpkin]] top texture.}} | ||
|{{HistoryLine||1.6|dev=Test Build 3|The breaking particles of redstone repeaters now use the [[Minecraft:Smooth Stone Slab|stone slab]] top texture, even though none of the elements on the model use it.}} | |{{HistoryLine||1.6|dev=Test Build 3|The breaking particles of redstone repeaters now use the [[Minecraft:Smooth Stone Slab|stone slab]] top texture, even though none of the elements on the [[Minecraft:model]] use it.}} | ||
|{{HistoryLine||1.7|[[File:Redstone Repeater (S) JE2.png|32px]] The side texture of redstone repeaters has been changed to the previous bottom part of the texture. | |{{HistoryLine||1.7|[[File:Redstone Repeater (S) JE2.png|32px]] 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. | |The breaking particles of redstone repeaters have been changed to a mix of stone slab, unlit [[Minecraft:redstone torch]] and unpowered repeater top when unpowered and a stone slab, lit [[Minecraft: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.}} | |[[Minecraft: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.}} | ||
|{{HistoryLine||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.}} | |{{HistoryLine||1.7.3|The breaking particles of redstone repeaters have been changed to simply an unlit [[Minecraft:redstone torch]] when unpowered and a lit redstone torch when powered.}} | ||
|{{HistoryLine|java}} | |{{HistoryLine|java}} | ||
|{{HistoryLine||1.0.0|dev=RC1|Redstone dust now visually connects to the output of redstone repeaters, though this does not change its behavior.}} | |{{HistoryLine||1.0.0|dev=RC1|Redstone dust now visually connects to the output of redstone repeaters, though this does not change its behavior.}} | ||
|{{HistoryLine||1.3.1|dev=12w22a|Redstone repeaters now naturally generate inside jungle | |{{HistoryLine||1.3.1|dev=12w22a|Redstone repeaters now naturally generate inside [[Minecraft:jungle temple]]s. | ||
|Repeaters are no longer being stuck when loading the chunks they are in.}} | |Repeaters are no longer being stuck when loading the chunks they are in.}} | ||
|{{HistoryLine|||dev=1.3|[[File:Redstone Repeater (item) JE2 BE1.png|32px]] The texture of redstone repeater [[Minecraft:item]]s have been changed.}} | |{{HistoryLine|||dev=1.3|[[File:Redstone Repeater (item) JE2 BE1.png|32px]] The texture of redstone repeater [[Minecraft:item]]s have been changed.}} | ||
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|{{HistoryLine||1.5|dev=13w02a|[[File:Redstone Repeater (S) JE4.png|32px]] The side textures of redstone repeaters have been changed to use the top texture of stone [[Minecraft:slab]]s.}} | |{{HistoryLine||1.5|dev=13w02a|[[File:Redstone Repeater (S) JE4.png|32px]] The side textures of redstone repeaters have been changed to use the top texture of stone [[Minecraft:slab]]s.}} | ||
|{{HistoryLine||1.8|dev=14w04a|[[File:Redstone Repeater (in minecart) 14w04a.png|32px]] [[File:Powered Redstone Repeater (in minecart) 14w04a.png|32px]] If a redstone repeater is set to render as the block inside of a [[Minecraft:minecart]] via commands or map editing, it now appears as this (previously it would be entirely invisible).}} | |{{HistoryLine||1.8|dev=14w04a|[[File:Redstone Repeater (in minecart) 14w04a.png|32px]] [[File:Powered Redstone Repeater (in minecart) 14w04a.png|32px]] If a redstone repeater is set to render as the block inside of a [[Minecraft:minecart]] via commands or map editing, it now appears as this (previously it would be entirely invisible).}} | ||
|{{HistoryLine|||dev=14w06a|Repeaters no longer produce block light when powered.}} | |{{HistoryLine|||dev=14w06a|Repeaters no longer produce block [[Minecraft:light]] when powered.}} | ||
|{{HistoryLine|||dev=14w10a|[[File:Powered Redstone Repeater (S) JE5.png|32px]] Torches on repeaters no longer have protruding features. | |{{HistoryLine|||dev=14w10a|[[File:Powered Redstone Repeater (S) JE5.png|32px]] Torches on repeaters no longer have protruding features. | ||
|The torches underneath redstone repeaters have been shortened, which has changed the underside textures from<br> [[File:Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]]<br>to <br>[[File:Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]]. | |The torches underneath redstone repeaters have been shortened, which has changed the underside textures from<br> [[File:Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater Delay 2 JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater Delay 3 JE2 BE1 (facing NWU).png|32px]] [[File: Active Locked Redstone Repeater Delay 4 JE2 BE1 (facing NWU).png|32px]]<br>to <br>[[File:Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Active Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Locked Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater Delay 2 JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater Delay 3 JE3 (facing NWU).png|32px]] [[File: Locked Active Redstone Repeater Delay 4 JE3 (facing NWU).png|32px]]. | ||
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|{{HistoryLine||1.14|dev=18w43a|[[File:Redstone Repeater (S) JE5.png|32px]] [[File:Powered Redstone Repeater (S) JE11.png|32px]] [[File:Locked Redstone Repeater (S) JE5.png|32px]] [[File:Powered Locked Redstone Repeater (S) JE6.png|32px]] [[File:Redstone Repeater (item) JE3 BE2.png|32px]] The textures of redstone repeaters have been changed.}} | |{{HistoryLine||1.14|dev=18w43a|[[File:Redstone Repeater (S) JE5.png|32px]] [[File:Powered Redstone Repeater (S) JE11.png|32px]] [[File:Locked Redstone Repeater (S) JE5.png|32px]] [[File:Powered Locked Redstone Repeater (S) JE6.png|32px]] [[File:Redstone Repeater (item) JE3 BE2.png|32px]] The textures of redstone repeaters have been changed.}} | ||
|{{HistoryLine|||dev=18w50a|[[File:Locked Redstone Repeater (S) JE6.png|32px]] [[File:Powered Locked Redstone Repeater (S) JE7.png|32px]] As the texture of [[Minecraft:bedrock]] has been changed, the textures of locked redstone repeaters have also been changed.}} | |{{HistoryLine|||dev=18w50a|[[File:Locked Redstone Repeater (S) JE6.png|32px]] [[File:Powered Locked Redstone Repeater (S) JE7.png|32px]] As the texture of [[Minecraft:bedrock]] has been changed, the textures of locked redstone repeaters have also been changed.}} | ||
|{{HistoryLine|||dev=19w12b|Redstone repeaters can now be placed on [[Minecraft:glass]], [[Minecraft:ice]], [[Minecraft:glowstone]] and sea | |{{HistoryLine|||dev=19w12b|Redstone repeaters can now be placed on [[Minecraft:glass]], [[Minecraft:ice]], [[Minecraft:glowstone]] and [[Minecraft:sea lantern]]s.}} | ||
|{{HistoryLine||1.19|dev=22w13a|Redstone repeaters now generate in ancient cities.}} | |{{HistoryLine||1.19|dev=22w13a|Redstone repeaters now generate in [[Minecraft:ancient cities]].}} | ||
|{{HistoryLine||1.20.2|dev=23w33a|Redstone repeaters now use stone sounds instead of wood sounds.<ref>{{bug|MC-182820|||Fixed}}</ref>}} | |{{HistoryLine||1.20.2|dev=23w33a|Redstone repeaters now use stone sounds instead of wood sounds.<ref>{{bug|MC-182820|||Fixed}}</ref>}} | ||
|{{HistoryLine||1.21.2|dev=24w33a|[[File:Powered Redstone Repeater (S) JE12.png|32px]] [[File:Powered Locked Redstone Repeater (S) JE8.png|32px]] The powered models for redstone repeaters have changed.}} | |{{HistoryLine||1.21.2|dev=24w33a|[[File:Powered Redstone Repeater (S) JE12.png|32px]] [[File:Powered Locked Redstone Repeater (S) JE8.png|32px]] The powered models for redstone repeaters have changed.}} | ||
| Line 255: | Line 255: | ||
|{{HistoryLine||1.13|dev=17w47a|All 3 IDs for the redstone repeater have been merged into 1 ID: <code>repeater</code>. | |{{HistoryLine||1.13|dev=17w47a|All 3 IDs for the redstone repeater have been merged into 1 ID: <code>repeater</code>. | ||
|Added powered block state to redstone repeaters. | |Added powered block state to redstone repeaters. | ||
|Prior to ''The Flattening'', these blocks' numeral IDs were 93 and 94, and the item's 356.}} | |Prior to [[Minecraft:1.13/Flattening|''The Flattening'']], these blocks' numeral IDs were 93 and 94, and the item's 356.}} | ||
}} | }} | ||
| Line 261: | Line 261: | ||
{{HistoryTable | {{HistoryTable | ||
|{{HistoryLine|bedrock}} | |{{HistoryLine|bedrock}} | ||
|{{HistoryLine||1.20.30|dev=Preview 1.20.30.20|Redstone repeaters now use the <code>minecraft:cardinal_direction</code> block state instead of <code>direction</code>.}} | |{{HistoryLine||1.20.30|dev=Preview 1.20.30.20|Redstone repeaters now use the <code>minecraft:cardinal_direction</code> [[Minecraft:block state]] instead of <code>direction</code>.}} | ||
}} | }} | ||
| Line 268: | Line 268: | ||
== Trivia == | == 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. | * The crafting recipe and appearance of redstone repeaters may be a reference to [[Minecraft:Transmission circuit#Repeater|double torch repeaters]], which was a common way to repeat signals before repeaters were introduced. | ||
== Gallery == | == Gallery == | ||
| Line 343: | Line 343: | ||
[[Category:Generated structure blocks]] | [[Category:Generated structure blocks]] | ||
cs:Ruditový zesilovač | [[Minecraft:cs:Ruditový zesilovač]] | ||
de:Redstone-Verstärker | [[Minecraft:de:Redstone-Verstärker]] | ||
es:Repetidor de redstone | [[Minecraft:es:Repetidor de redstone]] | ||
fr:Répéteur de redstone | [[Minecraft:fr:Répéteur de redstone]] | ||
hu:Redstone-jelismétlő | [[Minecraft:hu:Redstone-jelismétlő]] | ||
it:Ripetitore di redstone | [[Minecraft:it:Ripetitore di redstone]] | ||
ja:レッドストーンリピーター | [[Minecraft:ja:レッドストーンリピーター]] | ||
ko:레드스톤 중계기 | [[Minecraft:ko:레드스톤 중계기]] | ||
nl:Redstoneversterker | [[Minecraft:nl:Redstoneversterker]] | ||
pl:Przekaźnik redstone | [[Minecraft:pl:Przekaźnik redstone]] | ||
pt:Repetidor de Redstone | [[Minecraft:pt:Repetidor de Redstone]] | ||
ru:Редстоуновый повторитель | [[Minecraft:ru:Редстоуновый повторитель]] | ||
tr:Kızıltaş tekrarlayıcı | [[Minecraft:tr:Kızıltaş tekrarlayıcı]] | ||
uk:Редстоуновий повторювач | [[Minecraft:uk:Редстоуновий повторювач]] | ||
zh:红石中继器 | [[Minecraft:zh:红石中继器]] | ||
Latest revision as of 11:19, 12 April 2026
 |
For the {{{Description}}} of the same name, see [[{{{Destination}}}]]. |
Template:Infobox block A redstone repeater is a Minecraft:block that produces a full-strength Minecraft:redstone signal from its front while its back is powered, with four Template:Control delay settings. It can also be locked into its current power state by directly powering its side with another repeater or a Minecraft:redstone comparator.
Obtaining
Breaking
A redstone repeater can be broken instantly using any Minecraft:tool, or without a tool, and drops itself as an item. To remove a redstone repeater, Template:Control it. Template:Breaking row A redstone repeater is removed and drops as an item if:
- its attachment block is moved, removed, or destroyed;
- Minecraft:water or Minecraft:lava flows into its space;Template:Only
- a Minecraft:piston tries to push it or moves a block into its space.
Natural generation
A single redstone repeater is generated naturally in each Minecraft:jungle pyramid.
8-13 redstone repeaters can also generate in Minecraft:ancient cities.
Crafting
Usage
Template:See also 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 Minecraft:full blocks (dirt, stone, etc.), on top of upside-down Minecraft:slabs, upside-down Minecraft:stairs, furnaces, and glass. Template:IN, a repeater can also be placed on fences and stone walls. They can also be placed on some transparent blocks. See Minecraft:Opacity/Placement for more information. To place a repeater, use the Template:Control Minecraft: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 (Template:Frac) 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 Minecraft:power component (redstone torch, lever, block of redstone, etc.)
- powered Minecraft:redstone dust
- a powered Minecraft:redstone comparator or another powered redstone repeater facing the repeater
- a powered Minecraft:conductive block (including any conductive Minecraft:mechanism components, such as Minecraft:dispensers, Minecraft: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 Minecraft:conductive block (including any conductive Minecraft:mechanism components)
A redstone repeater can activate any Minecraft:mechanism component it is facing.
A Minecraft: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
Template:See also A redstone repeater can "repeat" a Minecraft: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 Minecraft:redstone dust the signal travels through. If a signal must travel through more than 15 Minecraft: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 Minecraft: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 Template:Convert.
Signal delay
When initially placed, a redstone repeater has a delay of Template:Convert.
A repeater's delay can be modified by using the Template:Control 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).
| Setting | Delay |
|---|---|
| 1st | Template:Convert |
| 2nd | Template:Convert |
| 3rd | Template:Convert |
| 4th | Template:Convert |
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-tickTemplate: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). Template:IN, 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, Template:In, instant repeater circuits are possible (circuits that repeat a signal with no delay).
Template:IN, when and whether a repeater turns on or off in reponse to changes in the input signal is affected by Minecraft: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.
Template:Anchor Signal direction
A redstone repeater acts as a diode – it allows redstone signals through in one direction (unlike Minecraft:redstone dust or Minecraft:conductive blocks that can transmit redstone signals in any direction).
A diode can be used to protect a Minecraft: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.
Template:Anchor 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 Minecraft: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
Template:Edition: Template:Sound table/Block/Stone/JE Template:Edition: Template:Sound table/Block/Wood/BE
Data values
ID
Template:Edition: Template:ID table
Template:Edition: Template:ID table Template:ID table Template:ID table
Block states
Template:El: Template:Bst Template:Bst Template:Bst Template:Bst
Videos
History
Template:More sounds Template:See asset history Template:See technical block
Java Edition
Bedrock Edition
Legacy Console Edition
New Nintendo 3DS Edition
Data history
Java Edition
Bedrock Edition
Issues
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
Template:JE
_JE8.png){kind=link}
_JE8.png){kind=link}
_JE8.png){kind=link}
_JE8.png){kind=link}
Template:BE
Contraption
-
A redstone clock formed from a redstone torch and a repeater.
-
A redstone clock formed from two repeaters.
Screenshots
-
Crossing redstone wires using repeaters.
In other media
-
MCRedstoneSim diagram of a two-way repeater.
References
Template:Navbox redstone Template:Navbox blocks
Minecraft:cs:Ruditový zesilovač Minecraft:de:Redstone-Verstärker Minecraft:es:Repetidor de redstone Minecraft:fr:Répéteur de redstone Minecraft:hu:Redstone-jelismétlő Minecraft:it:Ripetitore di redstone Minecraft:ja:レッドストーンリピーター Minecraft:ko:레드스톤 중계기 Minecraft:nl:Redstoneversterker Minecraft:pl:Przekaźnik redstone Minecraft:pt:Repetidor de Redstone Minecraft:ru:Редстоуновый повторитель Minecraft:tr:Kızıltaş tekrarlayıcı Minecraft:uk:Редстоуновий повторювач Minecraft:zh:红石中继器