Talk:Redstone circuits

This page is getting incredibly messy, so I'm going to attempt to do some cleaning and sorting. Anything resolved or not replied to since last year has been moved to the archive. From now on let's try to keep like topics together instead of duplicating, and stick to the new sections =) --Mwr247 23:19, 29 April 2011 (UTC)

Page Layout
For discussions pertaining to the layout of the page as a whole.

Standards
Can we seriously please keep stupid youtube videos off of this page? If we need them somewhere, put them somewhere else.

Redesign
So there were a few topics I archived, mostly old, regarding a redesign to the page as a whole. Fact is this page is just growing so large and cluttered with every possible circuit design, and space isn't being effectively utilized to present them in space saving and efficient way.

For one, I think listing every possible variation of a circuit design is just overkill. Maybe we could have a subpage for each one which would list that, but really we only need one or two on the main page for people to test and understand the logic.

Secondly, I seriously believe we need to deviate away from MCRS for our diagrams, and even more so away from these animated images. MCRS was a great idea and works fine for testing designs, but it really lacks in the way of presentation to people who are new to this (and even some of us old to it). Call me biased but, something closer in design to the master image would be great. maybe we could find someone to make this or convince the MCRS creator to change the standard? As to the animations, they are just horribly annoying, confusing, and lead to worsened standards since few know how (or at take the time) to put them together. In place of these, perhaps some sort of paged content area, where the viewer could hit next and back to navigate between the levels (possible in wiki formatting? I'm sure we could put together a template for it).

Anyways, these are just my thoughts. Anyone else have anything to add? --Mwr247 23:41, 29 April 2011 (UTC)


 * Thought I'd throw in my two cents as someone who has just begun to experiment with redstone circuitry. This page is very confusing to a beginner. Clearer definitions of all the different terminology would be appreciated, as well as easily understandable diagrams. This page reads like it was written by a coder for a coder, but not all of us have that background. A basic tutorial would also be a good idea. Thanks -- Pixeldestroyer 22:40, 29 May 2011 (UTC)


 * I agree with Pixeldestroyer. Ary31415 01:35, 4 June 2011 (UTC)


 * I had a thought, couldn't the more complicated animations, like the multiplexer, benefit from numbered animation layers? It's very hard for a beginner to pick up which symbols are which right away.  Also, could that tiny symbol table in the main article be blown up a bit, so the text in the graphic is more readable?  I'm pretty good at reading stuff and that text just keeps making me squint at it to read it, which is annoying.  BrickVoid 07:54, 13 July 2011 (UTC)BrickVoid


 * I really just dislike the idea of using animations, with the exception of animation redstone flow (like if someone wanted to animate the clock for example). The issue is animated gif's work at a set speed, and viewers have no way to speed it up or slow it down. So for something with 3 layers, it's going to constantly cycle between the 3 and the viewer has to wait for it to get to the right one again, then memorize what they were looking for before it's gone. Absolutely horrible. What I want is a viewing area with left and right arrows, that allow you to change the image in the box up and down levels as needed. I've seen it done on mediawiki before. --Mwr247 17:00, 23 July 2011 (UTC)


 * This is really, 100%, ABSOLUTELY necessary. Even as a redstone veteran, I STILL have a horrible time using this page.  Let me expand on what Mwr247 was saying with some of my own thoughts:
 * For one, the different circuit designs should be broken into their own pages. There is no need to clutter this page with hundreds of alternative circuit designs.  Take a look at how Wikipedia does it for the logic gates article.  They summarize the basic info, with links to the appropriate gate-specific pages.  Each of those pages describes the implementations in detail.
 * Secondly, I agree that we need to move away from MCRS format. MCRS does not support all the current redstone blocks, which forces inconsistent work-arounds.  Also, MCRS levers and torches look far too similar.  However, I don't think moving to the master image is the best idea.  The goal in circuit design is to simplify everything to just the circuit, and the master-image images are more complex than necessary.  I am a big fan of Circuit Simulator and its fork by Rek55.  This seems to be the only major 2D simulation project currently being updated, and I feel that it keeps enough of MCRS that the diagrams won't change too much, but they will change where they count.
 * Thirdly, how to solve the challenge of representing the three dimensional nature of redstone circuitry. I feel this half adder image does a very good job of this.  The animated gifs are far too complicated, and since they are constantly changing, it is difficult to see exactly what you are trying to design.  I totally agree that the shading nonsense in MCRS (which is very useful in the program, btw) does not lend itself to easy to read schematics.


 * I think I'll take a whack at totally overhauling this page this weekend. Stay posted.  I should have a link to a sandbox version that I'll be constantly working on soon.  --Nick2253 22:58, 19 July 2011 (UTC)


 * Don't forget to sign your posts (unless it was you below too lol, but there was a space between). Anyways, to your first point I would agree wholeheartedly. Pages can have subpages, so let's just break all of the logic get sections as they are into those new pages, and sort out the mess after (better than trying to sort it now and then breaking them out).
 * As to your second point, I would have to disagree., mostly. The goal of circuit design is to break things down to their simplest level, but the goal of this page is to present it in a way that anyone can understand it. These aren't only electrical engineers viewing this pages, but people who want to try their hand at making a simple contraption, and may not be familiar with the simplified formats (and to make them have to look up each one every time until they learn it is absurd). By using actual block representations in a grid, we can properly and usefully represent circuits to anyone who plays minecraft.
 * To your third point, I'd say that's definitely a step in the right direction. What I would ultimately want is as I mentioned above in a comment, a box with left and right arrows allowing you to select between the different levels of the contraption. I've seen it done on mediawiki before, and I'll look into all that it would require. --Mwr247 17:00, 23 July 2011 (UTC)


 * So, I've begun the process of editing the article (see my progress here). After I got frustrated with some writers block, I took a gander back through the archived Talk Section, I stumbled upon this gem: Talk:Redstone_circuits/archive.  User YEAH TOAST appeared to be in the process of breaking the circuits page into a number of subpages, but seemed to quickly fizzle out after November 2010.  Given the depth of this page at the moment, I vote to break this page into subpages similar to YEAH TOAST's work.  I will update as I make progress.  --Nick2253 20:05, 20 July 2011 (UTC)

(I re-combined the post preceding the above to avoid the confusing appearance of an unsigned post.) I also support and would like to encourage these efforts to improve the page. In particular File:Half adder.png is a good example of how to clearly show the layers. -Aurelius 15:01, 26 July 2011 (UTC)

I'd be ok with the side-by-side with labeled layers if we can't get the mediawiki idea working, but otherwise not too fond of it for more than 3 layers since it means potentially super wide images. I will say I'm working on a project now that will allow for the easy creation of image layouts along the lines of the one I made way back still at the top. If all goes well, it may turn into something even more ;) --Mwr247 02:48, 28 July 2011 (UTC)


 * Absolutely get rid of those animated GIFs. That is the most counterproductive idea I've ever seen. You want to make sure you have the layers correct, and the image flashes to a different layer. --Dogsworth 18:31, 9 September 2011 (UTC)

Maybe will be a good idea to make a templates similar to Template:Sprite and Template:BlockGrid for circuit purposes exclusively for circuit elements with all possible variants of their sprites? Than we make circuit maps that any newcomer can reproduce without problems. In my profile can be seen not best sample using existing sprites --0xE1 02:03, 17 September 2011 (UTC)

Compromised
Would it be possible to go a little more into detail about what it means if it's compromised and what adverse affects could result from compromised circuits? Youssarian 19:54, 13 February 2011 (UTC)
 * Not necessary if you spend the half-second to build the connection and realize what they mean. That is, when you connect wires like that, they share their ON/OFF state throughout the entire wire, until they get to something their state is independant of, such as the output of another gate. Diodes now can cut allow A while not contaminating your inputs.Firehound 09:42, 14 March 2011 (UTC)

Confusing terminology in Basic Mechanics
It seems to me the descriptions in Basic Mechanics are confusing and possibly using the same word for multiple meanings. In particular:
 * Redstone wire is defined as “active” if it is “immediately adjacent to a powered block”.
 * “The block under a pressure plate powers itself and all horizontally adjacent blocks when the pressure plate is activated.”
 * “Redstone wire beneath [a block with a pressure plate on it] will still be powered, because it is adjacent to the powered block above it.”

This indicates that the rule for redstone wire is indeed that it is active if it is “immediately adjacent to a powered block”, whether or not that block is actually able to transmit power into the block containing the wire (indeed, a block with a pressure plate mounted would not normally be able to transmit power to redstone beneath the block). This all reflects game reality as well.

However, another rule states that “A device, such as a door, a minecart track, or a block of TNT, is activated when an adjacent block is powered.”. Now, a device on top of a block will activate when redstone wire running up to the block is active, which makes sense given that “Redstone wire powers the blocks horizontally adjacent to the ends of the wire only.”.

However, running redstone wire up to the side of a block will not cause redstone wire underneath that block to become active, despite the fact that the block is “powered” (according to the activating-devices definition); the problem is that it's not powered according to the “transmitting” definition.

I therefore propose that the problem is overuse of the word “powered”. For example, I think the first bullet point at the start of my discussion should be that redstone wire is active if it is immediately adjacent to a transmitting block, not to a powered block. I think the section could do with some cleanup in general to strictly differentiate between powered blocks and transmitting blocks. Thoughts? Hawk777 05:47, 18 March 2011 (UTC)


 * That's not a bad idea. Ary31415 01:38, 4 June 2011 (UTC)

Redstone General
For discussions on things pertaining to redstone as it relates to circuits.

Max distance runs
I've done some experiments and found that the farthest you can get from a redstone circuit is 17.5 chunks (281 blocks). In other words, if a clock generator is placed in chunk #1, as soon as you cross the midway point of the 17th chunk it will cease operating. Important to note that it will not begin operating again until you are within 10 chunks (160 blocks). I have only tested this in one direction (North/South) so I'm not sure if a diagonal makes any difference - probably doesn't. That makes the largest redstone circuit design effectively 17x17 chunks (272x272x126). Smidge204 22:00, 9 October 2010 (UTC)
 * Excellent work, thanks. I think the maximum circuit design would be 35x35 chunks, though, as long as the player is standing directly in the center. I think this belongs as a technical note on the main article. --TaviRider 17:29, 20 March 2011 (UTC)
 * Actually, if the circuit ceases operating at 17 chunk distance and doesn't begin operating again until 10, then wouldn't that make it only 27 chunks? Say you start moving from the far end of the circuit, by the time you read the edge before where you started from stops working, it will only make the next 10 in front of you active.
 * This also surprises me since chunks says only the nearest 81 chunks are active. Does this mean redstone circuits across chunks can make the connected chunks stay loaded twice as long? --Sennyotai 06:48, 5 July 2011 (UTC)
 * It should be noted though that on SMP servers, there is no limit, We have run a signal to a ticker over 3000 blocks away. Deamon5550 18:14, 8 July 2011 (UTC)
 * I hope they fix this at some point. I just completed my long distance powered rail with a switch at either end. The switch box with the xor gate is at one end of the run. At the far end I can throw the switch and the rail won't power up/down. I spent a long time looking for problems in my circuit and ended up taking a couple screenshots halfway down the track where once I get there I can see power leading right up to a repeater (facing the correct direction) which remains unpowered. :(

Powering Redstone Through Walls/Blocks
In the article it says it is impossible to power redstone through blocks, but this is untrue. Redstone torches and repeaters can be used to transfer power through walls, but this is so obvious I thought I'd check to see if there is a reason for this omission. Pitzik4 18:14, 5 July 2011 (UTC)


 * The power can only be transferred through blocks directionally, but it still can be transferred. I think that part or the page needs a bit of rewriting. Father  Toast  18:39, 5 July 2011 (UTC)

Block not updating neighbouring devices upon cutting off their own power
When power is channeled into a block removing a wire/repeater next to this block won't update all devices/wires/torches connected to the said block until it's updated by other means. It will look like the block is still being powered yet nothing, in fact, powers it.

Problems with Redstone Torches
Rewrite: I've noticed when a the power going into a torch changes for one tick that the torch will not correctly update the next tick to what it should have been. This can lead to problems with edge triggering and making certain designs that require that have problems. This could be the cause of the T flip-flop E design not working and I believe its why some of my creations do not work properly. On rare occasions like maybe 1/15 or so attempts the torch will correctly update when this happens like it's supposed to but it's unreliable. Also this problem does not occur with redstone repeaters.

Here is an example. (this happens in minecraft but I'm using the simulator to easily explain it) Image:RSTorch EdgeTrig Prob.png A 2-tick edge trigger is attached to an RS Nor Latch to show that the power doesn't affect it even though it reaches it.

So is there anyway to contact mojang on this serious issue? It causes problems for designs using edge triggers and makes certain things either impossible or much more complicated to build. Jrob 17:11, 18 March 2011 (UTC)
 * I believe that the torches are behaving as designed. They need to be powered for at least one full tick before they will deactivate. I consider this one of many practical limitations that keep redstone from causing too many block updates.

That said, if you still want to report it to Mojang, post it on [Mojang's GetSatisfaction page|http://getsatisfaction.com/mojang]. --TaviRider 17:28, 20 March 2011 (UTC)
 * I guess this makes sense, but there must be some way to fix edge triggered to behave properly. Maybe all redstone devices including wiring should only change state at the begginging of a tick, this way nothing will get powered half way through a tick leading a torch to not recognize that first tick.

Jrob 21:43, 23 March 2011 (UTC)
 * I have run into the same issue with design E some work some the edge trigger fires too fast. So I redesigned the edge trigger to be adjustable. Image:Vertical_pulsar.gif The arrow is a relay and on setting 2 has always worked for me when the one in design E failed me. --Yssaril 22:53, 23 March 2011 (UTC)

Wiring a vertical redstone circuit
How do you take an input and use it to power blocks that are higher or lower than the lever/button/pressure pad? I'm attempting to construct the stairs mentioned in the trapdoor uses page. Soulblade0619 23:49, 2 June 2011 (UTC)


 * You just place blocks in a stair shape, put redstone wire going all the way up them, wire it to a switch, and put the trapdoor on the sides of the blocks. I have a picture but I don't know how to upload it. If you tell me how I'll upload it for you. Ary31415 02:00, 4 June 2011 (UTC)


 * I did just that. I made a stair shape of blocks, put wire on top of them and put the trapdoors on the side, and then put a lever on the block one to the left and one block up. The lever only activated the first and the second trapdoor (the second wire doesn't get power for some reason).
 * Do you think it has something to do with the fact that the staircase blocks are brick? Soulblade0619 00:07, 6 June 2011 (UTC)
 * It's about distance, the wires can only go for so long before they no longer 'activate'. because of the stairs you used up a lot of this distance before it reached the end of the trapdoors. Neopopulas14 June 2011

I figured out how to upload a picture. You do what the picture shows and put the trapdoors on the left sides of the blocks. If your staircase is really long, you will need redstone repeaters to extend the length a current can travel. Ary31415 13:57, 15 June 2011 (UTC) 00

Another, more compact way is to make a tight 2x2 spiraling staircase, going down one block each time. It is not any easier, but much more convenient when wiring very tall structures such as an elevator shaft or a lava pit.

Gate Designs
For discussions pertaining to the gates and their designs.

Missing Logic Gate (For Completeness)
The truth tables made me notice the list of gates is incomplete. Some are on the list or are input-switched duplicates of those on the list: nor; not a; not b; xor; nand; and; xnor; A implies B; B implies A; or. Some are trivial: always off; b; a; always on. That leaves two possibilities (one and it's input-switched version): b and not a, a and not b. I know it's a simple gate, but it should be included for completeness; It's basically just invert one input, join inputs, invert if anyone can put together a diagram (or an 'and' gate with one input inverter removed).

JK to T flip flop
Is it worth noting that a JK flip flop can be used as a T flip flop by connecting both J and K to a single input? I verified this myself with design C, with the clock either always on or just connected to the same input as J and K. I realize that most flip flops can be used as other types but the simplicity of creating a T from a JK makes it the most useful I think.
 * Is that really all that useful? For any given layout style, the TFF is a bit smaller than the JKFF; it seems counterproductive to eat up more space building a JKFF only to use it as TFF. Hawk777 03:40, 28 April 2011 (UTC)

Weed out some unimportant designs
Do we need to record EVERY possible way to create a certain layout? I see the need for different types of design (compactness, speed, resources used, simplicity) but some of these designs are unnecessary. Who would use RS NOR Design E?

I can see that a lot of them were made when repeaters were not available, but they are now, so weed out the old tech that became obsolete (I am thinking of the edge triggers on a few designs). Btw TFF Design A is the same as JKFF Design A. Just no J and K inputs -.-'

And that's not the only thing. It shows so much that this page is a dumping ground for all kinds of trivial knowledge about circuitry. And the same info gets mentioned a couple times. This page needs a serious cleanup. And I would even lock it down after that. Right now it's messy EE 101 lesson. 188.108.147.71 23:02, 26 September 2011 (UTC)

New Logic Gate: NOT B
--Rippledshark 06:03, 20 August 2011 (UTC)


 * I love the compactness of this design, but isn't this just an IMPLIES gate with an inverter on the end of it?
 * --Twistedlink07 23:44, 5 September 2011 (UTC)

New XNOR Gate
I needed a XNOR gate which was smaller and higher than the usual one, and ended up stacking two AND gates (the top one becoming "NAND" because of the bottom torches). It's only one column smaller than the usual, but I guess one is quite alright on a scale of five.



I'm not sure if it's really 'new', and if the design is clear, but it seemed to differ from the one presented on the page, so I thought I'd just as well share it here. Archasylum 09:45, 5 July 2011 (UTC)

New XNOR Gate
I've made a new design of xnor gate using repeater :



I think it can be optimised, and since it the first xnor gate using repeater, it may have a potential. --Ceandros 00:19, 11 July 2011 (UTC)

Another Pulse Generator
This Pulse Generator uses minecarts and rails to make a pulser. Just push a minecart on to the powered rails to activate the pulser.



The Second Version involves the redstone repeaters on one side to be on the setting 3, 3, 1 or 3, 2, 2. This way, both sides have and equal time beteen the the closing of one and the opening of the other.



Maybe, it's possible to create a more compact version of this.

Assisstion 11:15, 22 June 2011 (UTC)


 * I like this idea, a lot. In fact I just used a variation of it to solve a problem of mine with my latest insane contraption. However, your design does have one fundamental flaw. An endless loop will eventually accelerate carts up to max velocity and fail, destroying the cart.


 * This is easy to fix however. Instead of an endless loop, make a single line terminating in a ramp on each side. This way when the cart reaches the end, it goes to the top of the ramp, stops briefly, and then rolls back down the ramp. Use accelerators as necessary to make sure the cart never truly stops. Doctor Zuber 02:48, 5 July 2011 (UTC)


 * I made something similar using just one booster, one detector, and six regular tracks. The cart slows down considerably before hitting the booster again, so there's no threat of burnout, and the one in my world has been running without incident ever since pistons came out. The one issue with the design is that it can be easily disrupted by passing mobs, or the player if they're not careful.


 * I already posted this on the main page, so you can take a look there for a picture of my basic design. Sorry if I "snatched" the credit from you in any way. --Mo1dy cheez 06:46, 21 August 2011 (UTC)

More Compact Pulse Generator
I made a smaller, more configurable pulse generator that uses Repeaters. The shortest setting at the repeaters is 3 ticks (anything less appears to give no pulse), adjustable to 8. It could be modified to give a longer pulse by adding more repeaters.

It is smaller than the current smallest on the page, but is also two blocks tall.

Was unable to upload the image, here is a link: http://i.imgur.com/DhSEQ.png

SomeKindOfOctopus 02:10, 8 May 2011 (UTC)

I´m sorry but your link is broken could you please reupload it?

Update with new Redstone Repeaters?
So is anyone going to update these designs/schematics with the new Redstone Repeaters? I'm sure that some of these can be simplified a bit using the new repeater blocks. SpikeX 19:50, 24 February 2011 (UTC)
 * I've already tested and proofed some smaller designs for the RS NOR/NAND gate designs incorporating the new delay/repeater/diode block (2x3x1 and 3x5x2 respectively), and other gates could no doubt benefit from their inclusion (clocks and pulsars being some of the most significant). I think we need some official diagram image representation and then get to work on rebuilding some of these =D --Mwr247 20:50, 25 February 2011 (UTC)
 * 1.3 is the first version I have played, and I've noticed some of these designs no longer work, particularly when they involve edge triggers. The power will come on and off too quickly to trigger the torch.  The wonderful thing about repeaters is that adding one to one side of the non-triggering edge trigger seems to always work.  It's been a while since I did circuits and this is helping me remember my lab class... but would greatly appreciate updated circuit diagrams with repeaters nonetheless!
 * Joren (talk) 22:23, 1 March 2011 (UTC)
 * On top of that there's other rather huge benefits with repeaters in that the tiny RS latches you can make, end up being modular. You can do a 2x3x1 latch, that stacks. Letting you do say 16 bits of memory in 32x3x1. See: . Tatarize 09:51, 27 May 2011 (UTC)

Compact T Flip-Flop
I was trying to make a T flip-flop more compact using repeaters, and this is the result: Image:6x4x2_tflipflop.PNG

Is this worth adding to the wiki?

Output is at (3,3), and (4,7).

Input is to block (3,2). RT-073 20:20, 4 March 2011 (UTC)

Edit: It seems to only work when the button is to the north or east of the flip flip... Has anyone figured out if the south-west rule affects repeaters?

RT-073 19:03, 7 March 2011 (UTC)
 * One of the few TFFs I've managed to get working (being a beginner). The (4,7) output flickers on state changes, but the (3,3) output seems stable. The limit on the orientation is odd, but it's still a good design to me!
 * Ebkrem 17:46, 6 July 2011 (UTC)

New T Flip-Flop design
I found a new design for T Flip-Flops. It is really small: only 6x6x2 ! I added it to the page as "Design G" but I am not allowed to upload files so it is currently a link to an external image. If someone could upload it and add it as a thumbnail under the other designs... :)
 * Please sign your statements so we know who you are ;) Anyone want to test this for functionality? --Mwr247 23:19, 29 April 2011 (UTC)

An even more compact design, i'm unsure of etiquette for making changes, so ill provide a link here for anybody who wants to check it out. http://i55.tinypic.com/357eg7q.jpg --Uncleshibba 03:40, 24 September 2011 (UTC)

New Monovibrator Design
So I came up with a new monostable circuit design that doesn't rely on torch burnout, would this be something that we should include on this page? Image:Monovibrator.gif --cptroot 12:06, 26 February 2011

Vertical Flat Design Nonfunctional
Having implemented the circuit shown here with a slightly longer than normal delay (12 ticks) I found that it in fact does not work as desired. It lacks the RSNOR-latch present in other designs and thus if given a momentary input (say from a button) the output signal will switch off, rather than staying on until the delay finishes. See this screenshot. This design does work if the input signal is constant, however, as it will shut itself off without receiving a 0 input. The device is only monostable in that it will truncate the input signal, but not in lengthening a pulse.

...Likewise, neither does the compact version work as intended. T and Q touch directly, thus ruining the circiut. Nevermind, I'm an idiot. I had a test button to check it where I could see it, and it was providing input in the back end of the circiut. --Draco18s 23:55, 5 May 2011 (UTC)

I'm pretty sure your not an idiot, the compact monostable design on the page is faulty, its short-circuited as you said (Input connects directly with output.) I tried to use it when it was lever-powered and was powering a AND gate and I found that it burns out. I was able to make a simple correction on Minecraft by putting a block over the redstone adjacent to Q, but someone still needs to shade that block with editing software. --Weesplat 16:28, 30 June 2011 (UTC)



I fixed the compact monostable circuit but it will still burn out if you do not have the repeater on the 3 or 4 setting. Also worked on the vertical monostable circuit a bit and made it a bit smaller. Testing showed it worked with a lever and a button so pulse or constant power you will still get a short pulse when power is applied. Cadeff 02:18, 6 July 2011 (UTC)


 * You realize that I was trying to use a monostable circuit to lengthen a pulse (from a button), right? Your design only shortens that pulse (which, I suppose, is still a valid monostable circuit, just not what I needed at the time). --Draco18s 15:02, 23 August 2011 (UTC)

Compact Monostable
I just finished testing out and putting into use a highly compact and versatile monostable. The 3x3x2 design only has 1 or 2 torch delay. Adding extra repeaters wont make it much wider and the extention can be kept at one high.

Another advantage is that the T can be put on any of the redstone wire one the top side and the Q can be pulled off any of the bottomside redstone.

The obvious disadvantage is that the output is Q instad of Q. It was unintentional but helpful for me since this was to run a pair of doors and I had wired them up backwards for access reasons. Sennyotai 22:18, 26 June 2011 (UTC)

Built on this design for slightly more compact design. Cadeff 00:53, 5 July 2011 (UTC)

Two-Way Repeater
A while back, I created a new type of redstone circuit (as far as I can tell) which acts as a two-way repeater, essentially serving as an elongated strip of redstone. Unlike normal repeaters, which only work in one direction, this circuit allows a signal to be sent through it from either side. It does not have a traditional input or output, but rather two spots which serve as both input and output, depending on what is attached to them. Whenever either one of them is receiving power, the other one is also receiving power. Whenever one of them is off, both are off.

Also, this circuit even tells you the direction the signal is flowing. Of the two torches which appear unlit in the diagram, whenever the circuit is powered, one will be lit. It will be the only lit torch in the circuit, and it will face the direction the power is moving. Thus, if there is an input from A, the bottom-right torch will be lit. Image:Two way repeater.gif In short, the primary purpose of this circuit is to simulate the function of redstone wire without restricting signal direction like a repeater, but it also happens to indicate which direction the signal is flowing.

Anyway, can I have some feedback on whether or not this should be added to the main page? Sorry, I posted the above without signing. Tamugetsu 18:07, 10 March 2011 (UTC)Tamugetsu


 * Is there a more compact version of this using the new repeater blocks? --Balu 11:15, 12 June 2011 (UTC)
 * Yes: forum post by Felix_Casus has a more compact version, though the image should probably be updated with the new standard for Repeater icons: http://img8.imageshack.us/img8/3892/2wayrepeater.jpg --MidnightLightning 15:58, 21 July 2011 (UTC)
 * Oop, even more compact version here; I went ahead and made a Javascript Redstone sim image of it and updated the page. --MidnightLightning 16:18, 21 July 2011 (UTC)

Redstone Repeater XOR Circuit
I've come up with a new 4x3x3 XOR design using the properties of the new (1.3_01) Redstone repeaters; I wasn't sure of the repeaters graphic but its easy to identify. Image:XOR.gif --Dingmatt 22:24, 28 February 2011 (UTC)

Binary Counter
I have a binary counter set up that seems pretty simple... It's just a counter, a couple T Flip Flops and some AND gates. And instead of drawing out a diagram for every single piece (it is more than a few, I assure you), you could show how the outputs of the pieces should be connected. It's pretty simple once you have the T Flip Flop, Counter and AND gates down.
 * 1) Counter connects to the T Flip Flop (A), our 1 value, and presto, you can count from 0 to 1.
 * 2) The output also goes to the next T Flip Flop, (B). This is our 2's slot. You know have a binary counter that goes up to 3.
 * 3) The output from A and B go into the AND(a) item. The output from that AND(a) is sent to T Flip Flop (C), our 4 column. It is important that the output from A and the output from B are the input to the AND(a) gate.  If you invert to extend the length, invert back again. Also, the output from AND(a) must be the input to C. I can't stress this enough.
 * 4) Now that you can count up to 7, it is time to add the next piece. You use the outputs from sources AND(a) and T Flip Flop(C), and plug them into the next AND(b). The output from that connects to T Flip Flop(D). You can now count to 15.

That's as far as I've gotten, but you could follow the same pattern and potentially make it longer. The problem is, I use a 5-timer and the 8 column is *just* changing by the time the 1 column changes for the next number. You would have to have a timer that runs even longer than that. Or condense the counter somehow that I overlooked this early in the morning, so that there isn't so much delay.

Please respond with any comments, questions and concerns. -unsigned comment by Chevnoir 12 Nov 2010
 * Starting to build this with T-flop design E (edge triggered). What T-flop design are you using, FYI? --JellyfishGreen 12:02, 29 November 2010 (UTC)
 * I have successfully made a 35 bit Design E t-flip flop counter that when wired to tick once a second, will last a year before resetting, however this was simply by daisy chaining them together without any AND gates. May I ask, what is the significance of the AND gates and why are they needed for the design? --Crozone 12:25, 7 February 2011 (UTC)
 * This is brilliant, by the way. Mizusajt 07:44, 13 February 2011 (UTC)

NOR Gate
It's worth noting that a NOR gate with an unlimited amount of inputs is possible with the repeaters. Just use an AND gate to merge the inputs of an inverter after the repeaters. --ZeDingo 08:24, 28 May 2011 (UTC)

Boat T-Flip Flop
I found a T-flip-flop using a boat on Youtube Minecraft - Boat Memory. I was able to shrink it to 6x5x3 (4x3x2 without conting the walls+floor). It only works counter-clockwise. The original and the 6x5x3 version have a flashing output while the input is on. I fixed that by expanding it to 7x5x3 (5x3x2 without walls+floor).

sDww WDPw wwww w=water, W=water source, D=door, P=pressure plate(with output underneath), s=sign or pressure plate WDwww wDPsw sWwww

The upper Doors have to have the hinge on the upper left side (lower left if the inputs are reversed to each other) and the lower doors have to have the hinge on the lower right side. Don't forget the walls and the ceiling. Input is best done by laying redstone wire on the ceiling next to the doors. The mechanical design is obviously slower than an electrical one. The pro is that its small and can be put side by side sharing the walls. Stacking is problematic because the ceiling has holes.

New RS NOR latch
http://www.reddit.com/r/redstone/comments/i9534/3x2x1_clock_rs_nor_latch/ Can someone add it because I have no idea how to make the diagrams or assign it a name. --Ft975 15:41, 2 July 2011 (UTC)

New Piston Designs
Is anyone here looking into new designs using pistons? There's the clock already, but I think some of the memory devices could be made smaller using them. I've got a d flip-flop worked out, but the input is still a mess at this point. Rhilenova 20:28, 2 July 2011 (UTC)

I am :) Here's my result: A Tempoary 1-clock: Simply supply power to the monostable circuit, and you get a 1 clock that lasts for a time you can set by the delay line, and is OFF the rest of the time. --Fred7714 20:32, 4 July 2011 (UTC)

Further Compacted T-flip flop
I recently discovered this on youtube, and have yet to find a more compact design, so I believe this should be added to the Wiki: Thtredstonegui 08:51, 20 July 2011 (UTC)

Piston monostable circuit
I was messing around with trying to build a piston elevator (which didnt work very well in the end : and i came up with a design using pistons that uses a piston to distribute a pulse to two different wires with a slight delay in between.



This design can also be remade so you can have two outputs from one input with a small delay in between, like in this picture, of course there are simpler ways to do this, but i thought i should add it in! ^-^



I put repeaters on the outside too so that the pulse gets slightly lengthened because the 2nd pulse is a bit short if you set the piston's repeater to 2 ticks. Right now i think the best setup is a 1 tick delay on the repeater for the piston and a 4 tick delay on both of your pulse inputs.

If you want to reverse the piston's movements, you just put a torch on the block with the button & wire it separately, as shown here:



However i find that its most useful as a monostable circuit, but i thought that some1 might wanna do sumthing a bit more interesting with this, like maybe wire a clock up to it or sumthing. Vvaldir 16:31, 26 July 2011 (UTC)

Pulse Threshold Detector
I made this to stabilize a pulsed input into a constant signal, so long as the pulse was faster than a given period. With the repeaters set as marked, it can take periods of 30 ticks or less, with any pulse width (even just 1 tick). It then outputs a steady high signal. The design can be extended to handle low periods of greater length. Hooked to a clock, it will remain high on the output as long as the clock is running. It could perhaps be used to detect and restart a broken clock or to detect a minecart passing repeatedly over a sensor track, and turn that into a "it's ticking" or "it's not ticking" output.



Nonsanity 05:04, 10 August 2011 (UTC)

T-flip flop design F is NOT a T-flip flop!
I've tested the design. Once it recieves a fixed input, the output pulses on and off like a clock. This is not what a T-flip flop is supposed to do! --Munton 14:34, 13 March 2011 (UTC)
 * Seems the diagram is missing, but the table and body still reference it. Should be removed? --Mwr247 23:19, 29 April 2011 (UTC)
 * No. Don't remove it. Design F is a different type of flip-flop known as a level-triggered flip flop. To use it like a normal flip-flop, just hook t-input to the output of an inverter and a repeater(set at 4) in parallel. --Zonedabone 02:48, 1 May 2011 (UTC)
 * Don't remove it? It's a single sentence that's referring to a design that isn't even explained anywhere at all! If someone can look at the Redstone circuits page and tell me how to build an F-design flip-flop then I'm all for keeping it on the page. If not, I vote to remove it. DannyF1966 00:06, 5 June 2011 (UTC)

XNOR A not working
I've successfully built all the other gate types, but XNOR style A isn't working for me. It's behaving like AND instead of XNOR. Can someone confirm that the gate diagram is correct? --TaviRider 19:03, 16 October 2010 (UTC)
 * I cannot manage to reproduce any of the XNOR gates. Do any of them work? --bazzaNZ
 * I was able to get XNOR A to work. For XNOR B, it seems that the direction that the switches face matters. --TaviRider 01:05, 6 March 2011 (UTC)
 * I tried XNOR A and it behaved like and AND, just like TaviRider said. I still dont know enough about Redstone Circuits, but this is exhausting :/ --ThE - BliZZarD 00:40, 11 September 2011 (UTC)

XOR A not working
I tried XOR Designs A and F and both did not work for me - could somebody supply a simple picture of a working in-game XOR Design? --ThE - BliZZarD 00:44, 11 September 2011 (UTC)


 * XOR A is working fine for me. (Note the glass or some other block in place of it needs to be there to prevent the first two left torches from lighting the wire between them.)
 * i.imgur(DOT)com/JZt2E.png
 * For some reason XOR F is not. Am I doing it wrong?
 * i.imgur(DOT)com/CRAAp.png
 * i.imgur(DOT)com/yrxMt.png
 * i.imgur(DOT)com/1Om9g.png
 * i.imgur(DOT)com/CKXfV.png
 * Any help would be appreciated.(Also posting links unlogged in is fucked up) 75.164.150.139 00:28, 12 September 2011 (UTC)
 * Any help would be appreciated.(Also posting links unlogged in is fucked up) 75.164.150.139 00:28, 12 September 2011 (UTC)

--I have the same problem with F. It doesn't work. -je007

Also having problems getting F to work. I notice the table says it's 3x3x3, but the notation on how to read these diagrams doesn't say how blocks three layers deep are drawn. --Zed

Spent a long time fussing with it and I never got F to work. I made two xors following (regular) wikipedia's basic block diagrams. I think these are nicer, they may take up more space but especially the one with nands has a nice symmetry to it.

(fixed and improved !) T-Flip-Flop design G - missing Redstone
I built the T-Flip-Flop G as shown and it didn't work. There is a redstone wire missing on top of the top right block. If it's placed it works. --Phoenix IV 12:42, 30 April 2011 (UTC)
 * I simply edited the diagram by hand but I don't want to change the link in the article: http://img19.imageshack.us/img19/4817/tflipflopg.png Can it be used like this? --Phoenix IV 13:06, 30 April 2011 (UTC)


 * Hi there, I'm the one who added the design G.
 * It works only if there is a button on the bloc where there is the 'T'. Adding a redstone wire on the top of this bloc makes it works everytime.
 * I reduced the size to 6x5x2 and I have uploaded a new picture of the layout.
 * And can someone upload the picture http://ploader.net/files/7e8b686f228e6adae37b781224e4fb57.png to put it as thumbnail? I do not have the rights to upload a file...
 * --Refreshfr 17:25, 7 May 2011 (UTC)
 * --Refreshfr 17:25, 7 May 2011 (UTC)

T-flip flop design H is not very stable, and could be smaller
I've built quite a few of these over the last couple of days (like 20 of them). About 30% do not function correctly when built to the schematic. If the left-hand repeater is set to 2 ticks, rather than 1, it seems much better; so far every unit works correctly. Also, the design can be reduced to 6x3x2 quite easily. http://img20.imageshack.us/img20/8686/tffhrev2.png --DaftasBrush
 * I tried to build the design H but it's not a very good T Flip Flop. Not enough stable... --Refreshfr 17:12, 7 May 2011 (UTC)
 * I also tried this design. I even tried your variation. Neither appears to work. Doctor Zuber 19:36, 5 July 2011 (UTC)

T-Flipflop Z1, Z2, and Z3 have a timing non-symmetry
When the output of the flipflop turns on, it takes N ticks, and when it turns off, it takes N+1 ticks. This is due to the sticky piston; when it places the block, it takes 1 tick to push the block there. But when it removes the block, it first takes a tick to "push out", and then another tick to pull the block.

I must admit I only tried this with Z3, but since the problem is fundamental, and the designs are similar, I feel this should be mentioned.

For the record, I think N = 4 for Z3.

EDIT: Could someone check if this timing dissymmetry actually exists? I'm having a hard time verifying it...

Mqrius 08:13, 21 July 2011 (UTC)

I've found no evidence for this, I created a binary counter by chaining Z1's and had no problems lining up the timings, finding the delay between each line to be 4 ticks every time. I also tested this on a multiplayer server, and found no errors. I'm going to test Z2 and Z3 before I remove the notice on the main page.

EDIT: It's 3 ticks for Z2 and Z3. Z1 apparently trades speed for compactness. Regardless, there is no evidence of asymmetry for the tranisiton times, and there is no noticeable functionality difference on multiplayer.

Xirema 22:56, 30 July 2011 (UTC)

OR, NOR, and XOR
It took me a while, but I think I finally found out what each does: Cool12309(T 22:23, 28 May 2011 (UTC)
 * OR - If any input is powered, power the output:
 * If both inputs are on, do power the output
 * If either input A or input B are on, do power the output
 * If both inputs are off, don't power the output
 * NOR - If both inputs are not powered, power the output:
 * If both inputs are on, don't power the output
 * If either input A or input B are on, don't power the output
 * If both inputs are off, do power the output
 * XOR - If either inputs are powered, but both are not powered or un-powered, power the output:
 * If both inputs are on, don't power the output
 * If either input A or input B are on, do power the output
 * If both inputs are off, don't power the output

Could someone explain how design B for the OR gate can accept 4 inputs?

Oey192 02:41, 8 June 2011 (UTC)
 * You can provide a 4th input with a torch placed below the central block --Elec1cele 12:08, 24 August 2011 (UTC)

NOT SCHEMATIC ISSUE
There is an issue in the schematic for the NOT(invertor) gate, the issue is that it shows the following 4 blocks:

[A][AIR OVER BLOCK][AIR OVER TORCH][B]

The schematic should be:

[A][WIRE OVER BLOCK][AIR OVER TORCH][B]

I have personally verified this issue and submit that we need to change it picture of the schematic.

Richie

Diagrams
Question: Where should I put my multiplexer diagram and paragraph? What section? Je007 20:07, 30 June 2011 (UTC)

Diamgram B for XOR gates is wrong. There is no logic behind that logic gate. All the tourches should face upward (looking at the diagram).


 * Could you post a screenshot of the correct TYPE B XOR gate?
 * I'm having alot of trouble figuring out the diagram. Thank you!
 * 66.185.72.108 11:37, 16 October 2011 (UTC)

Shortened XNOR design
I could be wrong be wrong here, but in the Logic Gates section, couldn't the XNOR logic gate be shortened by 2? by removing all three the right hand redstone torches. Essentially just the XOR design above it but with it's two right hand torches replaced with normal redstone. R3sistance 04:32, 29 May 2011 (UTC)

Button-powered blocks
The article says buttons only power the block on which they're mounted, not the block they're actually in. I believe buttons do in fact power the block they're in as well as the block to which they're mounted. I just tried it in Beta 1.6.6. I don't know if this is a recent change, but I think the article should be updated. Thoughts? --Schufty 17:12, 2 June 2011 (UTC)


 * Buttons do power the block they're in. I just tried it a minute ago and I had done it in 1.5 too. Ary31415 02:03, 4 June 2011 (UTC)

Rapid Pulser not work well for SMP
If you are on a good running server there still very slow and a 1/4 clock is faster, but on a very bad server side lagging server these are unusable.

XCMods - Helping Minecraft users get the best out of the game. 22:26, 12 June 2011 (UTC)

Awesome!
I designed the T flipflop H/J design. It's really great to see that other people have played with it: replacing my graphic and investigating various gotchas. I'm honestly pleased. go minecraft!

Added T Flip-Flop K
It's a simple design that hasn't been compacted yet, allowing for people to see exactly how it works. Enjoy! Elite6809 (talk) (forum) 19:15, 14 June 2011 (UTC)


 * Sorry, but I don't think it makes sense to add designs which are not "better" than the current ones. There are infinite ways to build such flip-flops. "Just one more" without a special value would make a confusing list and not a worthwile wiki.--Binoro 00:19, 9 July 2011 (UTC)

1.6.6 clocks not working
I am running it on Max FPS, anything else lags too much. Anyway, I find that NO clocks work consistently. Even the tried and trusted redstone torch 5-clock will arbitrarily have all 5 torches burn out, never to come back on. can anyone else confirm this? I even have a 5-clock where you see two torches in a row off. Um? Any help on this, and should it be added to the article. Bobbobbob 05:37, 1 July 2011 (UTC)bobbobbob
 * When exactly do they burn out? --Yatsufusa 06:26, 13 August 2011 (UTC)

I have several clocks running in my world, and none of them are experiencing these problems. You mentioned lag: could your computer be the problem? KKPie 15:47, 1 July 2011 (UTC)

I have noticed in-game that using design B of the D Flip Flops section has a bit of an error when the input is 0 and the user activated the edge trigger. It sets the output to 1 for a brief moment sometimes before going back to 0. Scythesabre 03:51, 2 July 2011 (UTC)

I have this exact same problem - all my clocks burn out for no apparent reason. Also, if a torch burns out, any torches subsequently placed on the same block will instantly burn out the second they are powered. I do not have any problems with lag. Is anybody else having this problem? Nukerz 13:40, 12 August 2011 (UTC)

Pulse limiters and Monostable circuits
After looking at these two are they not the same thing? It appears that the section on pulse limiters needs removed completely as it is duplicate to monostable circuits. Cadeff 23:56, 5 July 2011 (UTC)

Sock-Shoe Redstone Circuit?
When working with pistons, one often finds that you need to activate one wire ("put on the sock"), then the other when the input powers on ("put on the shoe"), and deactivate the second wire ("take off the shoe") and deactivate the first wire ("take off the sock") when the input powers off.

I found a neat solution involving four repeaters. It was something like this: | Input |4 #># 1V V1  #<# |4L-- Shoe | |--Sock where the numbers next to the arrows represent the delays. The arrows are repeaters. I originally got this design from Docm77, who got it from TheReverendworm. Could someone come up with a better name for this, and put it on the wiki? Elmach2MN2 04:26, 14 July 2011 (UTC)


 * Hans Lemurson called it the "Reversible Signal Generator" (Image), although I think "reversing signal generator" is more to the point.  Fischertechniklas 21:14, 3 August 2011 (UTC)

You're effectively delaying the start of the shoe signal and the end of the sock "in/out dsequencer" Jasen1 13:45, 14 August 2011 (UTC)

I looked through the forum you posted an i think i have a smaller version. this is a picture of it :

I didn´t saw a smaller version or the same version please correkt me if i´m wrong. I´ll try to draw it with letters like you did:

I = Input | O1 = output for the piston wich is triggerd first and O2 for the other | + = redstone | _ = free space

I>+O1

v_v

+++O2

you can replace I and O1 with blocks so you don´t need redstone you only have to power the input-block and the output-block is powerd by reapeaters like this:

I = block | O1 = block | B = block

B>B

v_v

+++O2

IMPORTEND: like in my picture the two repeaters marked as two(2) must be set on delay level 2! and the one marked as one(1) at 1!

I2O1

1_2

+++O2

Rail T Flip-Flop
I wonder if its worth putting my version of the Rail T Flip-Flop here, because it doesn't use pressure plates.

http://imageshack.us/photo/my-images/7/20110726061543.png/

Yes its a no-brainer to replace them with sensor Rails. Also the picture hase a better resolution.

If anybody wanna do that, go ahead, as i have no clue how to upload picture in this wiki and use them LOL--Andy hc 04:25, 26 July 2011 (UTC)

image clarity and correctness
After reading section Talk:Redstone_circuits and Talk:Redstone_circuits/archive, I looked at the article and saw some images that were illegible - the thumbnailing of the GIFs appears broken. Accordingly I increased the sizes of three until the letters became legible. Then I noticed the RS NOR latches show inconsistent shading of the wires: some are bright red others are dark red. If they are intended to show on and off states then they are wrong in designs A and F, unless they are intended to show an illegal state where both Q and Q-bar are the same state. Will all the images be overhauled in the redesign linked above? -Aurelius 15:47, 26 July 2011 (UTC)

I have uploaded a PNG version with correct shading (I hope) to show what I mean. -Aurelius 15:58, 26 July 2011 (UTC)

Edge Detectors
The images are the right way round to the description, and setting the delay to 3 or so worked for me in SMP, I think. :3

Meh, maybe it's a lag thing. :P JeffBobbo 22:40, 3 August 2011 (UTC)


 * The rising edge detector works fine as per the image; it was only for the falling edge detector that I had to change the delay. I don't think it's lag related, because then it should have worked at least sporadically. I could imagine it being influenced by the orientation. Might need more testing... Fischertechniklas 02:41, 4 August 2011 (UTC)

0 tick wiring / gates
Using pistons to send instant downward edge pulses, instant wire can be created. TaviRider has a couple youtube videos showing what he has done. A user also made a glitch-based instant inverter. Using the instant inverters, it is possible to make a few instant logic gates. Newt0570 20:31, 10 August 2011 (UTC)

Anyone willing to proofread something?
Hey, so I just added a design for a "Minecart Clock" (4.7.3) that no one else seems to have discovered, and I'm looking for someone to look over my paragraph, see if it makes sense, make sure that the formatting is right, or point out any other unforseen errors. This is my first addition to the wiki, so I'm still a bit nervous about posting new content. Thanks!

Reverse sequencers.
I think this would be the page for this massively useful mechanism. There are two examples that I know of. Neither of them were invented by me. I'll leave it up to the collective whether to add it or not.

http://www.youtube.com/watch?v=JJH97AoUnio This version uses repeaters, and is compact, if a bit complex at first. I believe this meathod was first used by "TheReverendWorm"

http://www.youtube.com/watch?v=Vs-T0OJ8GFI This method was invented by "DeadStar12018" and uses only redstone. Also, it seems to be a bit more stable than the previous version.

Cleverlynamed1 02:26, 28 August 2011 (UTC)

Fast Off Slow On Circuit - Where To Put?
A circuit I wanted to share with the community. It's useful when you have a space that you want to toggle between two different blocks (attached to sticky pistons). For example, I use it to alternate between a smooth stone floor in a tunnel and a staircase leading down. The fast off means the piston payload already in place gets out of the way before the new payload attempts to enter the space.



Key: }-[] is the extended sticky piston. [] is a dirt block - and + are redstone wires. °\ is a redstone torch on the side of a dirt block. : is a redstone repeater (directed away from the wire toward the piston's payload block).

Wiremod
That reference to Garry’s mod and wire mod in the intro is irrelevant and seems to me to be a promotion of wiremod. I am removing it.

accurate 5 min timer
should this be added? it could be used to check between time of day or even allow multiple stages. the video comes with a map i think, no vids on the wiki so i wanted to check on the talk page before i posted it.

http://www.youtube.com/watch?v=v6Jifu5_w_o Bydolord 04:44, 19 September 2011 (UTC)

New rail T flip flop
New design by me. I built it to replace the old T flip-flop made with rails on the page.

www.youtube.com/watch?v=vZT0GyXVGKc

I'm going to post a picture.

Jx 22:26, 24 September 2011 (UTC)

Need help adding a clock that can be turned off
I made this clock that can be turned off by a lever which has many applications. I don't know how to add it properly here, so I took a picture so that someone else can add it:



Explanation:

The images show two pictures. The upper is before the lever has been switched and the lower is after.

It has 3 major components:

1. A lever that behaves as a button (bottom-left). When pressed it sends a signal which is as long as a button. "This is the 'button'" in the image shows where the signal is lit only for 0.5 s. The repeaters are set on 1 and 4.

2. A clock (top-right). A simple clock using repeaters. All set to 4.

3. A piston (top-left), which pushes a stone so that the current inside the clock can't circulate any more.


 * Most clocks can be turned off by simply powering the block that the redstone torch is attached to. That seems overly complicated. :\ Father  Toast  02:24, 1 October 2011 (UTC)

99% of so-called "D flip-flop" are gated D latches
I'm a bit confused about the terminology used to name the components of the "D flip-flop" section.

A D flip-flop is by definition edge-triggered.

Level-triggered "D flip-flop" don't exist. In fact they have a name : gated D latch.

This confusion has produced numerous cases of people building a gated D latch and calling it D flip-flop. Another consequence is that it is impossible to find a real D flip-flop design on the internet, as results are polluted by false D flip-flops. –Preceding unsigned comment was added by 78.228.213.69 (Talk) 13:26, 16 October 2011. Please sign your posts with


 * I can understand the confusion, but there's not much that can be done at this point. We could change the terminology on the Wiki to properly reflect the actual name, but that wont stop people calling them the wrong thing and perpetuating the misnomer.  Though, it would help somewhat.
 * Furthermore, I would make the change myself but I don't have enough of a knowledge base on the subject to properly modify the prose to reflect the new title. ~Markus talk 02:58, 21 October 2011 (UTC)


 * I agree with this suggestion. In my experience with electronic designs (not that I'm an actual electrical engineer, but I could probably play one on TV), when used formally in precise environments, a "flip-flop" or "register" always changes its output value on the edge of a clock input, whereas anything level-sensitive is a "latch". Latches would typically be RS latches, such as the ones shown on this page, or D latches (also known as "transparent latches"), such as the ones lumped in "D Flip-flops" on this page. Flip-flops would typically come in D, T, and JK forms, with each one changing its output on an edge of a clock input; many typical implementations of these flip-flops also have "asynchronous reset" or "asynchronous preset" inputs which are level-sensitive and do not require the arrival of a clock edge, but these inputs would generally be considered ancillary to the primary function of the device and hence would not influence its name. That said, this may be a locale- or background-specific view, as I believe the flip-flop page at Wikipedia has undergone a large edit war on exactly this subject. I do, however, feel that calling a level-sensitive RS device a "latch" while calling a level-sensitive D device a "flip-flop" is incongruous. Hawk777 06:47, 23 October 2011 (UTC)