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

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How to delay an input for a short while after it turns off?

I want to make a redstone device that prevents an input from turning on, then off, then on again very rapidly. For example, if a player turns a lever on, it should update instantly. However, if they ...
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1answer
1k views

Exactly how do the contents of a furnace effect a comparator?

Can someone tell me how the contents of a furnace affect a comparator? I want to create some automation in vanilla Minecraft, but don't know how the mechanics work.
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2answers
1k views

How can I control a tower of redstone lamps?

So I think this is slightly related to this question but I'm not sure I fully understand the rules controlling lighting redstone lamps. Say I have a tower like this: Right now, I can light it up ...
3
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1answer
961 views

What is a self-propelling “working” piston mechanism called?

In anticipation of the Redstone Update, I've been experimenting with this type of "wormhead" piston configuration lately: or: PSXXXXSP where P = normal piston, S = sticky piston, X = anything . ...
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1answer
417 views

How can I hold 256 bits of memory in Minecraft?

I need to build a type of memory that can hold 256 bits of memory, including on's and off's but it seems like the only way to do it would be with hundreds of RSNOR latches and I was just wondering if ...
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1answer
15k views

Vertical power transmission from top to bottom

Is it possible to transmit the redstone power with a lever, vertically, and from top to bottom?
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1answer
63 views

How can I detect if a person takes fall damage?

I am trying to make a command block creation that when you take fall damage, it gives you an effect. I am not using any of the methods that detect for air -1 meter of the player ( 1 , 2 ) because ...
3
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1answer
235 views

Where is there a key to the different redstone circuit notations used on the minecraft wiki?

There are lots of schematics of minecraft circuits online, but few of them reference the notation they are using and I am finding it hard to chase down what some symbols mean. The page on Advanced ...
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1answer
663 views

How can I make a reliable piston door?

My friend has a "empires" world and my castle is located on the water. I need a piston door that a boat can fit through with out breaking. Currently, I use a 2x2 piston door. (keep in mind the boat ...
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1answer
53 views

Command Blocks and Redstone Comparators

So I am giving Command Blocks a first try and I've found that with the comparator you can make it so it perceives a player is near them (and of course if you use the [r=x] tag. The scenario I am ...
3
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1answer
151 views

Is it possible to make piston flying machine that bounces?

I allways dreamt about making a piston device that can push itself. Now, with the addition of slime blocks, my dreams came true. The only flaw of these machines is that they work until they hit some ...
3
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1answer
66 views

How to create a display

I am trying to create a msg display for a friend in Minecraft. The display works with 2x2 "pixel". However, I cannot come up with a way to make the 2x2 pixel light up, in a repeatable, stackable ...
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1answer
284 views

Command Blocks vs Bukkit Plugin, Performance?

I am currently building an open world minecraft adventure map, primarily focused around compatibility for public multiplayer minecraft server. I would like to create events such as; spawning mobs when ...
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2answers
388 views

Will this Instant Repeater design work reliably?

I'm currently looking into the mechanism of redstone in minecraft. For one circuit, I need an instant repeater, and reading Minecraft wiki, the smallest one so far is the 4x5x3 instant repeater by ...
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1answer
1k views

Redstone torch not working in Minecraft beta 1.1_02?

Torches seem to be stuck ON all the time. Given SrrTrr (Switch, redstone, Torch) the torch and all the redstone are lit regardless of the position of the switch. Removing the torch shows the ...
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1answer
732 views

Can I use red stone in pocket edition? [duplicate]

I am a Minecraft pocket edition player. Can I use redstone for things?
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1answer
1k views

Redstone Circuitry - Resistors?

Is there any way to construct a resistor within a redstone circuit? I was thinking that there might be some properties of cobblestone versus glass, dirt versus obsidian, etc. but I haven't had the ...
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4answers
535 views

How can I check if a player is in the air with /testfor?

I'm interested in negating fall damage with command blocks by giving players Resistance as they're falling. How can I use /testfor to tell whether a player is on the ground or in the air?
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3answers
4k views

Is there a way to place a command block with a command in a chest and/or dispenser?

I'm in the new snapshot and trying to make a random TP out of a dispenser and command blocks just like SethBling in his snapshot video just with the difference that I want to place the dispenser with ...
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1answer
320 views

Minecraft greed trap

I'm making a trap so that when an object is removed from the pressure plate, it blows up. But Im a bit stuck. The pressure plate does not change the state of the redstone torch on the endblock. I need ...
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3answers
295 views

What's the easiest way to test the effects of chunk unloading on redstone circuits?

I'm building a long-distance signal transmission line for a railroad system. I think it will work because the player moves through chunks with the signal, but I want to test what happens to the ...
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2answers
1k views

How can I pause this redstone wall rotator as nessecary?

Back...with another Minecraft device. First off, I remember seeing a device like this on Reddit/YouTube a long time ago, and I've since forgotton how it was done. The way the device works ins ...
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4answers
408 views

Use a command block to “Sense” a player in a certain area

OK, so on my friends and my server, we have a skyblock map. My issue is when somebody joins they spawn above the Void. What I need is for a command block to determine if a player is near the Void and ...
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2answers
6k views

Why Isn't The /playsound Command Working In 1.7.2?

I am currently playing Minecraft 1.7.2 and am using a command block in a roller-coaster. I am trying to make a command block play the sound "moan1" from the "resources" folder in the directory ...
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2answers
6k views

How do I make a Stronghold locater?

I want to make a stronghold finder using TNT and redstone, but I don't know how. Every time I try it out I end up blowing myself up. This is my current design:
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1answer
74 views

Getting a row of pistons to trigger

I have been trying to get an row of 7 pistons to fire when a block has been pushed in front of the middle one. Every technique I try is not firing them. This is a Cobblestone floor maker. Here is an ...
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1answer
320 views

minecraft command block /setblock is innacurate

I notice when I use command blocks and /setblock, i will always have to subtract the x-value by 1 for it to go in the correct place when i check where the coordinates for the block i want to be set. ...
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1answer
4k views

Server-Friendly Minecraft Elevator?

Is there a server-friendly redstone elevator I can build in Minecraft? The "zipper" version doesn't seem to work, unfortunately.
2
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1answer
57 views

How many ticks for stone to form

I've been playing with new designs for a stone generator, playing with how fast I can get it running. I'm trying a redstone clock / pulse shortener this time. Is the rate that lava flows in to ...
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1answer
163 views

How do I check if a player has eaten rotten flesh in minecraft?

I'm working on a illness thing, and I need to make it so it checks if a player has eaten some rotten flesh then gives the player infinite hunger.
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1answer
1k views

Only allow certain blocks to be broken with mining fatigue

I want to make sure players cant break any blocks but wheat, while they have the mining fatigue effect. Is there a way to detect if they are trying to break the wheat or is there a way to only allow ...
2
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1answer
351 views

Making a command block with a command block

I am trying to make a spaceship that can go up and down basically. When it goes up, I want the command block to have a command. That's where I ran into a problem; I couldn't find a way to move a ...
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1answer
609 views

Briefly turning an output on when a switch is turned off

I'm not sure if there's a simple way to do this, or even a way at all. Basically what I have is a switch which is on, and two outputs. The first output is very simple - it goes on when the switch is ...
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1answer
6k views

Minecraft Double Switch Door

I'm trying to make a base with a hidden door that can be opened from the inside and outside. I was wondering if there was a way of making a circuit that could be operated from two different switches ...
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2answers
798 views

Changing delay with NOT gate?

I just asked this question 30 minutes ago and was told to use a NOT gate It worked at first, but I had to delay one of the pistons 100%. The problem is when they are to go back to the starting ...
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1answer
543 views

How to simulate a deck of cards in Minecraft?

A dispenser can eject one of nine different items at random, simulating a deck of up to nine cards (as of 1.6 it is no longer biased toward certain slots). How would you simulate a deck of cards with ...
2
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1answer
68 views

Easy way to execute remote admin commands?

So I'm finishing up my survival games map, adding final touches and such, but... I need an easy way to execute remote admin commands, like setting my own gamemode to creative, starting the game, or ...
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2answers
426 views

How can I /fill water?

I have a huge amount of area that i need to fill relative to the player's place. I tried typing /fill ~-80 69 ~-80 ~80 69 ~80 water which basically fills a 160x160 hole 1 block deep relative to the ...
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1answer
114 views

Test for birch log in Minecraft

How do i get my command block to test for a birch log in 1.8? What are the new item names? I have already tried names like birch_log, 17:2 log:2 and so on. Google is against me on this as well.
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4answers
2k views

Command Block always activates Comparator

I am trying to do something with command blocks. I have it test for a player at a certain position. I have set up a hopper clock that activates a command block with /testfor @a[x=-611,y=80,z=714] ...
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2answers
5k views

How to use a command block to welcome new players on a server in Minecraft?

Ok, so me and my friend own a server, it uses Minecraft 1.6.4. What I can't seem to figure out, is how to welcome new users to the server by saying Welcome USER To Northwood, when they join.
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2answers
2k views

Minute Long Redstone Delay

Currently I have something like this set up: B-R-R-R-C-R-R-R-C-R-R-R-C (etc...) B stands for a redstone block, R stands for a repeater, and C stands for a command block. I have a line like this ...
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3answers
859 views

How to build a two bit binary to decimal decoder using Redstone?

This is the logic circuit i want to create in Minecraft Can anyone make one for me because the one I am making is having lots of problems and is too messy. Redstone signals get jammed and they stay ...
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2answers
886 views

How do I prevent a second player from entering an area occupied by another player? [duplicate]

I am building a gambling machine that uses command blocks to take money from, and give money to a player. It also sends game messages to the player via the command blocks. Therefore, I want only one ...
2
votes
1answer
141 views

How to test for blocks within a certain radius of a player?

I'm trying to make a custom crafting system, but I'm not sure how to test for blocks within a radius of players, not command blocks. Specifically, I'm attempting to test if there is a dropper within ...
2
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1answer
87 views

Messing with Mob Equipment in Vanilla

I'm wondering if anyone knows of a way to equip a mob with an item that already exists using vanilla minecraft 1.8 commands. Specifically, if an Item entity is on the ground, is there a way to put ...
2
votes
1answer
81 views

Perfect test for uninterrupted redstone signal of a certain length?

Currently I am looking for a (preferably rather compact circuit) that will test whether a certain signal has been on for X amount of seconds. Just get a Pulse Length Detector, you might say. Only ...
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2answers
4k views

Using a command to replace wool blocks with command blocks which contain a command

I am trying to replace certain blocks in this case lime wool with a command block that contains a certain command. The following command to replace lime blocks with stone works: /fill ~-15 ~0 ~-15 ...
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2answers
278 views

How to test if someone died twice and then put them in creative with invisiblite x in command blocks

I am doing a minigame map, and there are a couple events I want to set-up: If someone dies twice they will be eliminated and put into creative with invisibility X If all of a persons wool is ...
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1answer
749 views

How can I make the redstone repeat a task x times and reset it self?

So I'm trying to make a redstone circuit that can repeat a task x amount of times and then reset it self. I was thinking of using a dropper and a hopper and use the hopper redstone signal (retrieved ...