Questions tagged [minecraft-redstone]

Questions about redstone contraptions and machinery in Minecraft. For command block contraptions, use the "minecraft-commands" tag instead. Always use this tag together with the "minecraft-java-edition", "minecraft-bedrock-edition" or "minecraft-legacy-console" tag.

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141
votes
5answers
31k views

Is Minecraft Turing-Complete?

Minecraft has the redstone wires mechanism that can be used to build circuits. Is Minecraft Turing-Complete, i.e. can it be used to simulate a Turing Machine (if we ignore the problem of infinite ...
37
votes
8answers
10k views

How to find a player's redstone clock (or other aggressive circuitry)?

I'm an admin for a minecraft server where I suspect one of the players has set up a fast cycle redstone circuit. The reason is the server uses what seems to me to be too high of cpu for only one or ...
33
votes
9answers
115k views

How do I create a very long delay with Redstone?

The only things I've found so far are a cart method (which ceased working in 1.6), a dispenser method (utilizing the decay on dropped items, but this requires occasional feeding), and a binary counter ...
31
votes
4answers
185k views

How to channel Redstone current vertically?

I'm making a door with piston sliding sideways that reacts to pressure plates. As the pressure plates are sending the current to redstone at a very low level, I need to raise it somehow, and this ...
30
votes
8answers
52k views

How far can redstone current travel?

I know that there is a 15 block limit before a repeater is needed, however I am looking for the TOTAL distance that current can travel. Is it infinite? Can I keep adding repeaters and go on forever? ...
26
votes
5answers
75k views

How do you lengthen a redstone button signal in Minecraft?

I made a little redstone circuit to open a door (using pistons) with a button, but I was wondering how I could make the door stay open a little longer. I don't want to use a lever as I want it to ...
21
votes
2answers
29k views

How do redstone torches (circuits) work in Minecraft?

I tried reading the minecraftwiki page on the subject, but without an understanding of precisely how the torches work, none of it makes sense. I have a lot of questions, so even an article explaining ...
20
votes
5answers
30k views

What is Redstone used for in Minecraft?

I've found several piles of Redstone in Minecraft, but I can't seem to find a coherent explanation as to what it does or how to use it. Does anyone know what it's used for, and how to use it ...
20
votes
3answers
12k views

What are some tips for mastering redstone circuits? [duplicate]

Possible Duplicate: How do redstone torches (circuits) work in Minecraft? New to Minecraft, just got beta, mastered most of the mechanics (mining, picks, the Nether, etc.) and now my final ...
20
votes
6answers
33k views

Is there a way to shut down a Nether portal with redstone?

Since it is no longer possible for flowing water to deactivate a Nether portal, you can't use pistons to push blocks into the nether portal and finally you can't move the obsidian powering the portal ...
19
votes
2answers
6k views

How to make 20 minutes (1 day) delay? [duplicate]

I am getting tired of manually managing my chicken farm, so I have invented this automated design: The step from eggs to chicken is easy, and it's even simple to make it happen in batches - every ...
19
votes
5answers
7k views

How do I create a hidden staircase?

I'm currently trying to create a hidden set of stairs (made of whole blocks, not stair blocks) by having pistons stacked on top of each other, so that when it's deactivated it looks like a flat ...
19
votes
1answer
8k views

What's the best way to build a track selector?

I'm building a new terminal for my minecart tracks: Currently there are 8, I may add more later. What I'd like to add is a single arrival/departure track, with buttons to select destination. Pressing ...
18
votes
2answers
4k views

Why are these pistons pushing?

I've lately become hooked into building computers in Minecraft and today I decided to build a giant hard drive. I've built HDDs before, but not at the scale I'm currently attempting, and I anticipated ...
18
votes
6answers
16k views

What's the largest size of “door” I can open with a single switch?

I'm fairly new to using redstone, and I'm wondering what's the largest size of "door" that can be opened with a single switch? I have a huge arena, and I'd ideally like to be able to hit one switch ...
18
votes
2answers
14k views

Keep some chunks loaded in Minecraft SMP

I am looking for a mod or something which would allow me to keep some chunks loaded on the SMP server I administrate. In fact, it is a redstone circuit including a clock under a huge mob trap which ...
17
votes
5answers
112k views

How can I get my redstone to activate adjacent pistons?

I'm trying to create my first circuit in minecraft: a - pressure plate p - piston d - dirt - or | - redstone   a----dddd pppp Pistons are placed over the dirt and there's water under ...
17
votes
5answers
12k views

Is there a more efficient way to wire a row of pistons?

I want to create two sets of two adjacent pistons with a two block gap between them for a melon farm. It seems as though I'm using a prodigious amount of redstone for each section. This is my first ...
17
votes
4answers
10k views

In Minecraft how do I randomise the output in a redstone circuit?

I have 5 buttons and only one of these can be correct, all others must be false. These 5 outputs will go into 2 outputs, in between there needs to be a circuit which changes which single button out ...
16
votes
3answers
2k views

Is it possible to invalidate a dispenser after it has been used once?

I am making a map in Minecraft that other people can play. I have a dispenser with an iron, golden and diamond sword in it. I want the player to be able to use this dispenser only once. How would I do ...
16
votes
4answers
69k views

Without mods, is it possible to filter items in hoppers/droppers/others?

I'm new to Minecraft, and finally out of my "build a log cabin and try not to die" phase. I just completed my second useful machine today, a dropper-vator from level 14, up to the top of a large(ish) ...
16
votes
5answers
115k views

How can I bring zombies down to one-punch kills in Minecraft?

There's something about zombies in Minecraft that if you merely drop them down 23 blocks for the fall damage, they take two punches to kill, rather than one punch like other mobs. (23 ½ is the same, ...
16
votes
5answers
7k views

Is it possible to power all the blocks in a wall?

Let's say I have a 5x5 wall that has redstone torches on each block on one side: Is there a redstone circuit that would allow me to power every block in this wall, so that all torches turn off ? I'm ...
15
votes
3answers
1k views

How can I keep ghosts out of my machine?

I've been building a number of redstone circuits lately, and to keep them protected I've been enclosing each entire circuit in obsidian. However, recently I noticed that a zombie managed to spawn in a ...
15
votes
2answers
8k views

Bidirectional (two-way) repeater?

I have a long section of rail that I'd like to serve with a single minecart. If I left the minecart on the other end of the railway, I'd like to push a button to have it sent over to the station I am ...
14
votes
2answers
9k views

How can I randomly power one of several wires in Minecraft? [duplicate]

Given 5 wires (possibly more), I want to press a Reset button, and have exactly one of those wires, randomly selected, become active - and remain that way (until the next button press). What is a ...
14
votes
2answers
4k views

What property of redstone torches allows activating stacks of items?

Looking at this video about the new pistons in Minecraft 1.7, he has arranged 3 horizontal-pushing pistons in a stack vertically and is using an alternating pattern of redstone torches to activate ...
14
votes
6answers
7k views

How can I make a Random Number Generator with vanilla redstone? [duplicate]

I'm working on a game for my Minecraft server that includes the element of chance. The idea is that there are 6 buttons. One of them (randomly determined by redstone circuitry) results in wealth, ...
14
votes
1answer
3k views

Why do Minecraft double doors behave the way they do with redstone? [closed]

I've seen videos that explain how to make redstone double doors, but none of them really explain why redstone double doors work that way, just that they do. Is there an explanation for their ...
14
votes
2answers
1k views

ALU in Minecraft, what can be achieved with this?

Recently articles popped up of how someone created a working ALU in Minecraft. For example, this article on ALU in Minecraft. He is quoted in some articles saying he is going to take it a step ...
14
votes
3answers
17k views

Instant open piston door with delayed deactivation with pressure plates

I was wondering if anyone knew of a proper way to get a pressure plate to trigger a series of pistons instantly, but have their deactivation delayed by about a variable number of seconds. I've tried ...
13
votes
7answers
5k views

Powering a Redstone Lamp on top of a Piston

I am trying to design a street lighting system which is controlled by a light sensor. What I would like to have is for the redstone lamps to be lowered, flush with the ground, during the day but at ...
13
votes
1answer
691 views

How does this rapid pulser work?

While experimenting with redstone, I seem to have come across this strange piston-based circuit: Although it may not be obvious from the picture, this circuit causes the upper wire to rapidly turn on ...
13
votes
2answers
1k views

Why remove redstone dust from my command block contraptions?

Whenever I show my command block contraptions to my friends, they always comment that I should remove the redstone dust from them. They say it causes lag and that redstone can be unpredictable, but I'...
13
votes
1answer
2k views

Redstone Golf: Light up a random torch [closed]

The Challenge: Design a redstone circuit that accepts an input from a button and lights up a random redstone torch. The Rules: One redstone torch should be lit, with all the others off. The state of ...
13
votes
1answer
9k views

From under what blocks can daylight sensors detect sunlight?

I'm looking for a good block to cover up my daylight sensor that would look nice with my build design. I had read the Wiki page on it and tested a few blocks that I thought would have worked, some did ...
13
votes
2answers
6k views

Fixing permanently dead redstone torches in Minecraft?

There seems to be a newish bug in Minecraft where redstone torches burn out sooner than they ought to, and never recover. (I think I heard that this can happen if you use /time set, but this is a ...
12
votes
2answers
980 views

How many possible outcomes will there be to my Minecraft lock?

I just built a lock for a door in Minecraft. The user has to pick the correct four colors out of twelve. Order doesn't matter. What is the probability of the user guessing the correct colors?
12
votes
3answers
115k views

How can I make a redstone signal go more than 15 blocks?

Currently, I'm limited to using at most 15 blocks of redstone. Is there a way to bypass this limit? I dont want to use Wireless redstone because I want to see what is connected to what. Would be ...
12
votes
2answers
13k views

Is there a maximum limit to the number of blocks a piston can push?

For example: could you effectively push a line of blocks off into the distance? Is it limited by the loaded chunks? Or a shorter upper limit countable in blocks?
12
votes
1answer
573 views

Minetracks and Redstone - preventing the track from fixing itself

This is my current minetrack setup. The red marked part is supposed to go up, such that it works as a booster. On the left handed side you can see a wire going to the other track that is behind the ...
12
votes
3answers
1k views

Are there any fast 256 bit decoders for Minecraft?

I am currently working on a 256 byte RAM. To access one address i have to build a decoder. My current decoder is a big block of AND-Gates with redstonetorches to check each combination. Are there any ...
11
votes
5answers
5k views

How do I create an inactivity timeout device?

I want a redstone circuit which has one input (or an arbitrary number of ORed inputs, but I can wire that up myself), one output, and where the output is on whenever the input is on as well as a for a ...
11
votes
1answer
3k views

Will My Gravel Crusher Work?

Of all the repetitive item-grinding tasks to perform in Minecraft, easily the most tedious task (For me at least) is grinding flint out of gravel. My usual method involves grabbing a shovel, ...
11
votes
4answers
21k views

Super compact piston door with button and pressure plate

Is there a super compact design (or what's the most compact design) for a piston door which should have a button on one side like this: and a pressure plate on the other side: ? I have tried a lot ...
11
votes
4answers
10k views

How to Make an Instant Off/Delayed On Redstone Circuit?

I would like to make a circuit with one lever input and two outputs. When the user flips the lever, I would like for the one output that's ON to immediately turn OFF, while the other output which is ...
11
votes
2answers
7k views

How can you turn a rapid pulser on and off?

We have built a number of large rapid pulsers for Floor D of Fosco's server's community wiki. D, obviously, is for disco. Disco seen from the deejay's point of view, with two jukeboxes. I just wish ...
10
votes
3answers
3k views

Analog redstone signal amplifier/multiplier?

Is there a redstone circuit that could alter redstone signal strength by multiplying it by a constant factor? For example, my circuit produces signal in range 1-8 strength, and I'd like to get 2-16 ...
10
votes
1answer
989 views

Math behind Minecraft Redstone Torches Burning Out?

So, I know that redstone torches burn out, and according to the Minecraft wiki, there is some maths behind this. Unfortunately, the MC wiki isn't very descriptive (and mixes redstone ticks with game ...
10
votes
3answers
9k views

How to generate a predetermined number of pulses?

Motivation: I have a grinder that spawns spiders which are then moved to a very small space. When they accumulate in big enough numbers, I pull a lever and let a piston crush them 11 times. Then I can ...

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