Minecraft:Observer - Revision history

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2026-08-28T11:20:57Z

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	=== Mojang images ===		=== Mojang images ===
	<gallery>		<gallery>
	Rejected graphics for the Observer.jpg\|Rejected graphics for the observer.		Rejected graphics for the Observer.jpg\|Rejected graphics for the observer
	Jeb Observer.png\|Development image of an observer from Jeb.		Jeb Observer.png\|Development image of an observer from Jeb
	Frowny Observers.png\|The first image released of the new observer texture for ''Java Edition''.		Frowny Observers.png\|The first image released of the new observer texture for ''Java Edition''
	</gallery>		</gallery>

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	=== Behavior ===		=== Behavior ===
			{{See also\|Redstone circuits}}
	{{IN\|java}}, an observer detects [[Minecraft:Block update#Post placement update\|shape updates]] coming from the block it's facing. This can involve changes in block states (like crops growing, for example), or the breaking or placing of a block. This makes observers differ from [[Minecraft:block update detector]]s in terms of what they can detect.		{{IN\|java}}, an observer detects [[Minecraft:Block update#Post placement update\|shape updates]] coming from the block it's facing. This can involve changes in block states (like crops growing, for example), or the breaking or placing of a block. This makes observers differ from [[Minecraft:block update detector]]s in terms of what they can detect.

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2026-08-18T11:37:08Z

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	\| archetype = Slow Bouncy{{only\|JE\|short=1}}		\| archetype = Slow Bouncy{{only\|JE\|short=1}}
	}}		}}
	An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone pulse]] from its output side ~~(featuring a red dot)~~ whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.		An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone pulse]] from its output side whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.

	== Obtaining ==		== Obtaining ==

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2026-08-17T11:19:03Z

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	\| archetype = Slow Bouncy{{only\|JE\|short=1}}		\| archetype = Slow Bouncy{{only\|JE\|short=1}}
	}}		}}
	An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone]] ~~pulse~~ from its ~~back~~ whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.		An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone pulse]] from its output side (featuring a red dot) whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.

	== Obtaining ==		== Obtaining ==
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	{{IN\|BE}}, it is aligned to [[Minecraft:redstone tick]]s and will detect [[Minecraft:block update]]s only on odd game ticks also known as [[Minecraft:P-tick]]s.		{{IN\|BE}}, it is aligned to [[Minecraft:redstone tick]]s and will detect [[Minecraft:block update]]s only on odd game ticks also known as [[Minecraft:P-tick]]s.

	Observers also emit a pulse after getting moved by [[Minecraft:pistons]]: this enables them to be used in [[Minecraft:flying machines]]. {{IN\|JE}}, moving an observer while it's not active causes it output a pulse after its usual delay; however, moving an observer that is currently emitting a redstone signal causes it to turn off instead. {{IN\|BE}}, an observer that was moved by a piston always outputs immediately.		Observers also emit a pulse after getting moved by [[Minecraft:pistons]]: this enables them to be used in [[Minecraft:flying machines]]. {{IN\|JE}}, moving an observer while it's not active causes it to output a pulse after its usual delay; however, moving an observer that is currently emitting a redstone signal causes it to turn off instead. {{IN\|BE}}, an observer that was moved by a piston always outputs immediately.

	[[File:Observer conduction behaviour.png\|alt=An observer preventing the redstone signal from being transmitted.\|thumb\|200px\|Observers preventing the redstone signal from being transmitted in ''Java Edition'']]		[[File:Observer conduction behaviour.png\|alt=An observer preventing the redstone signal from being transmitted.\|thumb\|200px\|Observers preventing the redstone signal from being transmitted in ''Java Edition'']]

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	== Trivia ==		== Trivia ==
	* The observer was first developed for and added exclusively to [[Minecraft:Pocket Edition]] (v0.15.0) before it was later ported to the [[Minecraft:Java Edition]] (1.11) and other editions.		* The observer was first developed for and added exclusively to [[Minecraft:Pocket Edition]] (v0.15.0) before it was later ported to the [[Minecraft:Java Edition]] (1.11) and other editions.
	* It was ~~specifically~~ created ~~to give Pocket Edition players a functional equivalent to the "~~[[Minecraft:~~quasi-connectivity]]" bug (used to create [[Minecraft:block update detector~~]]~~s), which did not exist in Pocket Edition's redstone engine. Observers were designed as an official, intended replacement for that Java-exclusive mechanic.~~		* The current observer texture was created because [[Minecraft:Jeb]] kept confusing the front with the back. He said it was inspired by the "rejected texture" created by Tommaso Checchi.<ref name="ReferenceA">{{tweet\|tomcc\|727044087522713600\|Here's my rejected graphics for the Observer, because @darngeek has no artistic sensibility\|May 2, 2016}}</ref><ref>{{tweet\|jeb_\|795625080067866624\|I kept confusing myself which side was front and back, so here's something inspired by the works of @_tomcc http://i.imgur.com/IK2d8m2.png}}</ref>
	* The current observer texture was created because Jeb kept confusing the front with the back. He said it was inspired by the "rejected texture" created by Tommaso Checchi.<ref name="ReferenceA">{{tweet\|tomcc\|727044087522713600\|Here's my rejected graphics for the Observer, because @darngeek has no artistic sensibility\|May 2, 2016}}</ref><ref>{{tweet\|jeb_\|795625080067866624\|I kept confusing myself which side was front and back, so here's something inspired by the works of @_tomcc http://i.imgur.com/IK2d8m2.png}}</ref>

	== Gallery ==		== Gallery ==

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	== Usage ==		== Usage ==
	An observer is placed directionally. When placed, the observing face (the side with the "eyes") always faces ~~toward~~ you ~~and detects~~ most changes in the block directly in front of it. ~~This detection produces~~ a [[Minecraft:redstone pulse]] ~~from behind the observer (opposite side of~~ the observing face). To change the observer's facing direction, position yourself in front of the desired direction before placing it.		An observer is placed directionally. When placed, the observing face (the side with the "eyes") always faces away from you, detecting most changes in the block directly in front of it. The output side (featuring a red dot) faces toward you and emits a [[Minecraft:redstone pulse]] whenever the observing face detects a change. To change the observer's facing direction, position yourself in front of the desired direction before placing it.

	As observers can detect the state of other observers, placing two adjacent observers, each watching the other, can make a fast and compact redstone clock. This is known as an [[Minecraft:Double Observer Clock\|observer clock]].		As observers can detect the state of other observers, placing two adjacent observers, each watching the other, can make a fast and compact redstone clock. This is known as an [[Minecraft:Double Observer Clock\|observer clock]].
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	{{IN\|java}}, an observer detects [[Minecraft:Block update#Post placement update\|shape updates]] coming from the block it's facing. This can involve changes in block states (like crops growing, for example), or the breaking or placing of a block. This makes observers differ from [[Minecraft:block update detector]]s in terms of what they can detect.		{{IN\|java}}, an observer detects [[Minecraft:Block update#Post placement update\|shape updates]] coming from the block it's facing. This can involve changes in block states (like crops growing, for example), or the breaking or placing of a block. This makes observers differ from [[Minecraft:block update detector]]s in terms of what they can detect.

	{{IN\|bedrock}}, an observer acts as a block update detector and detects anything that causes a block update.		{{IN\|bedrock}}, an observer acts as a [[Minecraft:block update detector]] and detects anything that causes a block update.

	~~The causes and propagation~~ of ~~block updates are different between ''Java Edition'' and ''Bedrock Edition''~~. As a ~~result~~, ~~each can detect some kinds of changes that the other cannot. See the table below for~~ a ~~comparison~~.		When it detects something, the observer emits a [[Minecraft:redstone pulse]] of [[Minecraft:Redstone circuit#Power\|strong power]] at signal strength 15 for 2 [[Minecraft:game tick]]s. The pulse can power [[Minecraft:redstone dust]], a [[Minecraft:redstone comparator]], a [[Minecraft:redstone repeater]], or any [[Minecraft:Redstone components#Mechanism components\|mechanism component]] located at its output side (featuring a red dot).

	~~When~~ it ~~detects something, the observer emits a~~ [[Minecraft:redstone ~~pulse]] of [[Minecraft:Redstone circuit#Power\|strong power]] at signal strength 15 for 2 [[Minecraft:game~~ tick]]s~~. The pulse can power~~ [[Minecraft:~~redstone dust~~]]~~, a~~ [[Minecraft:~~redstone comparator]], a [[Minecraft:redstone repeater~~]]~~, or any [[Minecraft:Redstone components#Mechanism components\|mechanism component]] located at its opposite end.~~		{{IN\|BE}}, it is aligned to [[Minecraft:redstone tick]]s and will detect [[Minecraft:block update]]s only on odd game ticks also known as [[Minecraft:P-tick]]s.

	~~In ''Java Edition'', the pulse is emitted with a delay of 2 game ticks. In ''Bedrock Edition'', it should be delayed by 2 game ticks as well, but it'~~s ~~sometimes delayed by 4 or 6 game ticks due to {{bug\|MCPE-15793}}~~.

	Observers also emit a pulse after getting moved by [[Minecraft:pistons]]: this enables them to be used in [[Minecraft:flying machines]]. {{IN\|JE}}, moving an observer while it's not active causes it output a pulse after its usual delay; however, moving an observer that is currently emitting a redstone signal causes it to turn off instead. {{IN\|BE}}, an observer that was moved by a piston always outputs immediately.		Observers also emit a pulse after getting moved by [[Minecraft:pistons]]: this enables them to be used in [[Minecraft:flying machines]]. {{IN\|JE}}, moving an observer while it's not active causes it output a pulse after its usual delay; however, moving an observer that is currently emitting a redstone signal causes it to turn off instead. {{IN\|BE}}, an observer that was moved by a piston always outputs immediately.
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	=== Limitations ===		=== Limitations ===
			The causes and propagation of [[Minecraft:block update]]s are different between {{JE}} and {{BE}}. As a result, each can detect some kinds of changes that the other cannot. See the table below for a comparison.
	{\| class="sortable wikitable collapsible collapsed"		{\| class="sortable wikitable collapsible collapsed"
	! rowspan="2" \| Block change		! rowspan="2" \| Block change
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	== Trivia ==		== Trivia ==
	* The ~~current~~ observer ~~texture~~ was created ~~because~~ [[Minecraft:~~Jeb~~]] kept confusing the front with the back. He said it was inspired by the "rejected texture" created by Tommaso Checchi.<ref name="ReferenceA">{{tweet\|tomcc\|727044087522713600\|Here's my rejected graphics for the Observer, because @darngeek has no artistic sensibility\|May 2, 2016}}</ref><ref>{{tweet\|jeb_\|795625080067866624\|I kept confusing myself which side was front and back, so here's something inspired by the works of @_tomcc http://i.imgur.com/IK2d8m2.png}}</ref>		* The observer was first developed for and added exclusively to [[Minecraft:Pocket Edition]] (v0.15.0) before it was later ported to the [[Minecraft:Java Edition]] (1.11) and other editions.
			* It was specifically created to give Pocket Edition players a functional equivalent to the "[[Minecraft:quasi-connectivity]]" bug (used to create [[Minecraft:block update detector]]s), which did not exist in Pocket Edition's redstone engine. Observers were designed as an official, intended replacement for that Java-exclusive mechanic.
			* The current observer texture was created because Jeb kept confusing the front with the back. He said it was inspired by the "rejected texture" created by Tommaso Checchi.<ref name="ReferenceA">{{tweet\|tomcc\|727044087522713600\|Here's my rejected graphics for the Observer, because @darngeek has no artistic sensibility\|May 2, 2016}}</ref><ref>{{tweet\|jeb_\|795625080067866624\|I kept confusing myself which side was front and back, so here's something inspired by the works of @_tomcc http://i.imgur.com/IK2d8m2.png}}</ref>

	== Gallery ==		== Gallery ==

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2026-08-14T11:09:36Z

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	== Usage ==		== Usage ==
	An observer is placed ~~similarly to~~ a [[Minecraft:~~piston~~]]~~. It observes~~ the ~~block that it is placed against. The texture~~ of the ~~detecting side is that of an~~ observing face. As observers can detect the state of other observers, placing two adjacent observers, each watching the other, can make a fast and compact redstone clock.		An observer is placed directionally. When placed, the observing face (the side with the "eyes") always faces toward you and detects most changes in the block directly in front of it. This detection produces a [[Minecraft:redstone pulse]] from behind the observer (opposite side of the observing face). To change the observer's facing direction, position yourself in front of the desired direction before placing it.

			As observers can detect the state of other observers, placing two adjacent observers, each watching the other, can make a fast and compact redstone clock. This is known as an [[Minecraft:Double Observer Clock\|observer clock]].

	=== Behavior ===		=== Behavior ===

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	[[Minecraft:ja:オブザーバー]]		[[Minecraft:ja:オブザーバー]]
	[[Minecraft:ko:관측기]]		[[Minecraft:ko:관측기]]
			[[Minecraft:lzh:探械]]
	[[Minecraft:nl:Observeerder]]		[[Minecraft:nl:Observeerder]]
	[[Minecraft:pl:Detektor]]		[[Minecraft:pl:Detektor]]

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	\| flammable = No		\| flammable = No
	\| lavasusceptible = No		\| lavasusceptible = No
	\| archetype = Slow Bouncy {{~~until~~\|~~BE 26.40~~}}		\| archetype = Slow Bouncy{{only\|JE\|short=1}}
	}}		}}
	An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone]] pulse from its back whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.		An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone]] pulse from its back whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.
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	\|{{HistoryLine\|\|1.16.100\|dev=beta 1.16.100.55\|Observers no longer get stuck in an active state when moved by [[Minecraft:piston]]s.}}		\|{{HistoryLine\|\|1.16.100\|dev=beta 1.16.100.55\|Observers no longer get stuck in an active state when moved by [[Minecraft:piston]]s.}}
	\|{{HistoryLine\|\|26.30\|dev=Preview 26.30.27\|Sulfur cubes can now absorb observers, giving them the slow bouncy archetype.}}		\|{{HistoryLine\|\|26.30\|dev=Preview 26.30.27\|Sulfur cubes can now absorb observers, giving them the slow bouncy archetype.}}
	~~\|{{HistoryLine\|bedrock upcoming}}~~
	\|{{HistoryLine\|\|26.40\|dev=Preview 26.40.26\|Sulfur cubes can no longer absorb observers.}}		\|{{HistoryLine\|\|26.40\|dev=Preview 26.40.26\|Sulfur cubes can no longer absorb observers.}}
	}}		}}

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	\| flammable = No		\| flammable = No
	\| lavasusceptible = No		\| lavasusceptible = No
			\| archetype = Slow Bouncy {{until\|BE 26.40}}
	}}		}}
	An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone]] pulse from its back whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.		An '''observer''' is a [[Minecraft:block]] that emits a quick [[Minecraft:redstone]] pulse from its back whenever its "face" detects that the [[Minecraft:block]], [[Minecraft:fluid]], or [[Minecraft:air]] directly in front of it has changed.
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	\|{{HistoryLine\|\|1.16.100\|dev=beta 1.16.100.55\|Observers no longer get stuck in an active state when moved by [[Minecraft:piston]]s.}}		\|{{HistoryLine\|\|1.16.100\|dev=beta 1.16.100.55\|Observers no longer get stuck in an active state when moved by [[Minecraft:piston]]s.}}
	\|{{HistoryLine\|\|26.30\|dev=Preview 26.30.27\|Sulfur cubes can now absorb observers, giving them the slow bouncy archetype.}}		\|{{HistoryLine\|\|26.30\|dev=Preview 26.30.27\|Sulfur cubes can now absorb observers, giving them the slow bouncy archetype.}}
			\|{{HistoryLine\|bedrock upcoming}}
			\|{{HistoryLine\|\|26.40\|dev=Preview 26.40.26\|Sulfur cubes can no longer absorb observers.}}
	}}		}}