Questions about redstone contraptions and machinery in Minecraft. For command block contraptions, use [tag:minecraft-commands] instead.

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9
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1answer
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What is the most compact design of down-shifting double-pistons?

It is often useful to stack pistons to shift blocks by more than one space. As an extended piston can not be moved, the timing of the corresponding redstone circuit is of crucial importance. ...
9
votes
1answer
238 views

How can I get this setup to work properly?

I have a setup in a space-station with which I want an airlock with two doors: door X & door Y. I've remade this setup in the Overworld in a smaller fashion to show you how I've got it set up ...
8
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2answers
2k views

Is it possible to lift a block from the bottom of the map to the top using pistons?

Can you raise/lower a single block by an arbitrary distance using pistons? Will this work with chests?
8
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2answers
442 views

Is it possible to make a Player go only backwards?

I'm making an Adventure map (it has loads of command blocks), but I got stuck: How can I make a Player to be able to go only backwards, that is, only when pressing the 'backwards' key, and to be ...
8
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1answer
515 views

How can I select a single bit out of an array of latches?

Let's say I have 4 latches, each representing a bit: I want to be able to see the value stored at a specific bit. I specify which bit I want to look at by entering a binary number via. switches: ...
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2answers
2k views

Can I build a TNT cannon that fires the TNT directly upwards?

I've successfully built a cannon that will fire the player upwards to above the clouds by using this design (found on YouTube). The player stands on the stone pad, it triggers the TNT and the "water ...
8
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3answers
1k views

Making a Station With Redstone Booster Track

Now I have finished my underwater tunnel I have built somewhere for my railway to stop at. The cart comes in from the left, hits the booster and then hits the sloped booster track (unpowered). I am ...
8
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1answer
12k views

How do you create double doors that open in sync from a 2-wide power source?

I've got a double door which I power from below, using a T-flip flop triggered by a pressure plate on the inside so that when I walk out, the doors open before me and when I walk in, the doors close ...
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2answers
1k views

A “Lockdown” function for Minecraft?

Hey guys, just wondering, I have a large house/base that is divided into four sections. I want to implement a redstone circuit that will automatically close all the doors that are connected to the ...
8
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2answers
21k views

Can I use dispensers or droppers to auto-replant crops?

I'm working on a fully-automatic farm now that 1.5 is out. The plan is to use redstone to flush fully-grown crops into a channel to be collected by a hopper and then picked up by a cart. The issue ...
8
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3answers
2k views

Trail of particles from a point to TNT

I have a map where I spawn Primed TNT then teleport it to a random Mushroom Cow which is invisible to make 100% random explosion. Now I want to make a particle trail from an orb kind of block in the ...
7
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3answers
8k views

Can I use Redstone underwater?

Fairly simple question: Do redstone dust/redstone torches/switches/etc. work underwater?
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2answers
7k views

How can I create a “master” switch with redstone?

How can I create a "master" switch with sub-switches all connected to the master switch? When then master switch is turned on, it allows power to go to all the sub-switch (when the sub-switches are ...
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7answers
6k views

How can I generate a redstone signal when players are near?

Is it possible to construct something that will run automatically whenever a player is nearby, say within a chunk's range, without that player having to trigger something like a pressure pad or ...
7
votes
4answers
2k views

Minecraft save-all timer

I have recently found that my MC world does not auto-save (Don't answer on how to do that), so I have to /save-all every 5 minutes or so. However, I have created a timer hooked up to a /save-all ...
7
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1answer
6k views

Giving a minecart momentum with a piston

I am trying to setup a situation where I press a button and a minecart is pushed onto some powered track where it is then boosted up and giving a good speed. This is what I tried (cross-section): ...
7
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1answer
192 views

Redstone clock leaks current

I built a small clock like the example at the beginning of this video, however, the pulse redstone is triggered slightly every time the cobblestone blocks move over it, instead of just when the glass ...
7
votes
2answers
6k 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 ...
7
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3answers
657 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) ...
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3answers
2k views

Gate to allow only one player to pass through

On my server I have a quiz which you need to take before you can go to most of the areas, build etc... However, sometimes people try to cheat by going with friends into there. I want some kind of ...
7
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1answer
6k views

Minecraft redstone circuit turns off all other circuits after any of them are turned on

What I'm trying to do is to get the momentary switches to activate the paths on the left of the RS NOR latches and when you activate one it deactivates all the other activated switches. The idea is ...
7
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1answer
28k views

How to set a command block with a command inside using the setblock command

Does someone know how to set a command block with a command inside using the setblock command? I have created this code /setblock <x> <y> <z> command_block ...
7
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1answer
1k views

Adding more sound files to resource packs

If I create a resource pack for Minecraft, am I able to have more natural sounds than there already are? For example, creeper sound files range from "creeper1" to "creeper4". If I were to add a file ...
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2answers
2k views

Minecraft Pulser Burns out

According to this article 1-clocks and 3-clocks are possible to make but they will "burn out" because of their speed, which makes them unstable. Redundancy can be used to maintain a ...
7
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1answer
3k views

How to make a block disappear after a certain period of time

So I am making a 'magic trail', which is essentially wherever you walk and jump, a block will be placed below you. Unfortunately, the trail will always stick around and never go away. After a while ...
7
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3answers
236 views

How do I build a 4x2 Piston Gate?

I have been searching the Internet searching for the solution, but I have yet to see it... Just to clarify I am NOT looking for... I want to solution to the following gate... The Gate is very ...
7
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2answers
574 views

What are the specific conditions that cause repeater lockup in multiplayer?

While playing SMP, the issue of redstone repeaters "locking up" (getting stuck in the on state) was brought up. Another user showed me their issue, a redstone clock using two repeaters and redstone ...
6
votes
2answers
7k views

problem with two-level piston

I'm trying to make a two level piston (i.e. when it is powered on it pushes blocks up two levels rather than just one). The way that I am doing it is placing a row of pistons on top of a row of sticky ...
6
votes
2answers
27k views

How do I power Redstone through a block?

I have seen this in YouTube videos: a person places a Redstone Torch on the wall like in the picture, and it activates a circuit. No matter how many layouts I have tried I can't seems to get a power ...
6
votes
3answers
274 views

Hidden Pressure Plates

I want to make a trap in Minecraft, and I can only do this is with a pressure plate. Any ideas on how to get an invisible one?
6
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3answers
65k views

How do I reverse the activation of Pistons with redstone automatically?

So basically, I want to make a hidden Piston door using Redstone that opens and shuts when I pull a lever. As you can see, the door consists out of 14 sticky Pistons ...
6
votes
4answers
356 views

How do I create unbreakable blocks?

I am creating a map on Minecraft, and I want the players to break certain blocks like trees, but I don't want them to break other blocks like stone bricks. Is there any command that can help me?
6
votes
1answer
5k views

Getting the signal from a floor pressure plate in the middle of a room

I have this contraption with a floor plate that causes certain changes in a wall couple of blocks away (ie, firing pistons, etc). The floor plate is on a stone floor, and I wouldn't like to mess up ...
6
votes
2answers
935 views

Is it really possible to get to the End City without killing the Ender Dragon like in this video?

I watched a video about how to get to the End Cities without killing the Dragon: It shows how to find the End Cities without killing the Dragon. The player builds a ...
6
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4answers
25k views

How to make flashing lights in Minecraft with repeaters?

What is the best circuits for flashing lights with repeaters ? I've seen old school way with redstone but now with the repeaters, how to do it right ?
6
votes
3answers
729 views

Powered rail on a slope powering glitch?

I have placed a powered rail on a slope with a redstone torch underneath it as shown in the following two pictures. Now as you can see, the powered rail is in fact unpowered, despite the redstone ...
6
votes
2answers
1k views

How do you stop items from being pushed through walls in Minecraft?

I am working on an automated chicken farm. Things are going quite well and my prototype is working, but I am having a small issue that affects my efficiency. For my kill step, I have pistons open up ...
6
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1answer
408 views

Any more compact self-activating piston designs?

I need to push incoming blocks in a new direction using a piston activated as soon as there is a new block to be pushed. In the screenshot, if the block from below is pushed in front of the piston, it ...
6
votes
3answers
1k views

Minecraft “power ripple”

Does there exist any known way to create a "power ripple" using redstone; i.e. a situation that is, essentially, just like a sequence of wire-repeater segments, but powering every intermediate block, ...
6
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1answer
1k views

Redstone torch on a block that is powered directly by another torch doesn't turn off?

As far as I understood, if you power the block that a redstone torch is on, that redstone torch turns off. But as the question title states, if I power the block directly with another redstone torch, ...
6
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1answer
3k views

How can I build a simple flip-flop with Redstone?

I've been trying to learn more about Redstone after doing some research for another Minecraft question. I've never played Minecraft before, although I'm familiar with Terraria, which I believe is ...
6
votes
3answers
2k views

How can I get this redstone blast door to do what I want?

I'm working on expanding my Minecraft Redstone experience and contraptions. Here, I have a 2 blocks high x 3 blocks wide section of a tunnel with a track approaching it that is meant to act as a ...
6
votes
2answers
985 views

How do you automatically detect water in Minecraft 1.8?

I'm building an automated farms for several crops, including wheat. The farm consists of a long cascade of farm fragments: Seen from side Currently, I have to manually toggle water off after it ...
6
votes
1answer
2k views

How do I make a “Rotary hopper clock”?

I'm working on a project that requires a fairly long delay. I found the "Rotary hopper clock" on Minecraft 101, and I do like the compact design it has to it. However I'm not entirely sure how it ...
6
votes
1answer
9k views

How do I make a piston go up and then down?

I'd like to make a piston go up and down just once (then I'll make this thing repeat forever), how do I do that? How do I give the piston the order to go down after it went up in a single tick?
6
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3answers
403 views

Piston is destroying track

I have been following a tutorial on youtube regarding building a minecart station. Now I have had no issues whatsoever until I hit the cart loading section unlike in ...
6
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4answers
466 views

How should I go about “reseting” a large arena?

For a minigame map I am making, I have a large (320*320*116) destructible arena. Players get explosives, blocks, etc. and the entire area can change. At the end of the match, I would like to restore ...
6
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2answers
461 views

Minecraft redstone logic - comparing 6 inputs

i do have 6 inputs. 3 A inputs, 3 B inputs. Each one of them can be set to on or off. I now have to compare those 6 and look who has more on-inputs. A or B? Does anyone have a solution for this? ...
6
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4answers
1k views

How to store big variables in a redstone RAM memory?

I've just made a simple RAM memory in Minecraft (with redstone), with 4 bits for the address and 4 bits stored in each cell. Our next goal is to store different kinds of variables in it and to process ...
6
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2answers
662 views

How to invert a pulser and connect a door to it?

Obviously inverting a pulsar is kind of redundant, since it goes on and off repeatedly... however, when I want it to stop, a lever would do just fine, but it would keep it powered on. but what if I ...