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

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2
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2answers
1k 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 ...
0
votes
1answer
30 views

How can I use /execute to run a command on a named item

I'm trying to do /execute @e[type=Item,name=Test] ~ ~ ~ /setblock ~ ~ ~ minecraft:stone Why does this not work? and what command should i be doing?
1
vote
2answers
45 views

testfor a fake player on a scoreboard

I'm trying to testfor if a fake player called MobHunger on a scoreboard objectives that is Stats. I tried this: /testfor MobHunger[score_Stats_min=1,Team=Mob_Hunger] but it doesn't work... any ...
1
vote
2answers
42 views

Setblock clock with scoreboard doesn't work in Minecraft

I've been trying some things with scoreboard lately and I always get to the point where I need to use the following commands. /scoreboard players set @a Holding 0 /scoreboard players set @a Holding 1 ...
1
vote
1answer
272 views

Detecting items in a Dropper

I am standing on a dropper facing upwards, with 64 stone blocks in the top-left slot, and I am running this command: /testforblock ~ ~-1 ~ dropper 1 {Items:[{Count:64,Slot:0,id:stone}]} but for ...
2
votes
4answers
553 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?
-1
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1answer
67 views

Button interacting with trapdoor

I was making a chair that has trapdoors. I have a button that is supposed to power redstone behind a block but powers the trapdoor and the door of this chair. Tutorial: ...
2
votes
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 ...
0
votes
1answer
3k views

Can I use /testfor on zombies?

I know how to use the /testfor perameters in a command block to scan for players. But I need to test for zombies. Can you test for things that aren't players? If so then what else can I test for and ...
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vote
6answers
15k views

In minecraft how do you command conditions on to players

I'm developing a minigame server. I just need to know what commands to use, via command block, to give players special conditions infinitely such as; speed boost, regeneration, or jump boost.I know ...
0
votes
1answer
95 views

Prevent hacking on Vanilla server

I have a vanilla minecraft server (1.8.7) and I've taken some measures to prevent hacking, but I still have people logging in and breaking stuff at spawn. Is there anything else that I can do to ...
1
vote
2answers
90 views

How can I get redstone working again?

I am making a huge zombie siege map with tons of redstone. Just recently, I tried to make a comparator clock to activate a command block. Instead, It only turns on and off about once or twice a ...
10
votes
4answers
8k 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 ...
2
votes
3answers
11k views

How to use setblock command for placing stone button on the left side of the command block

I tried to use the command setblock ~1 ~ ~ stone_button but then it places a button on air. I'm running Minecraft 14w11b snapshot from the 1.8 snapshots. Does someone know how to fix this? Pictures ...
0
votes
1answer
69 views

Q. What is the most effective /testfor command?

Ok, I've tried many variants of /testforcommand and tried them in the lastest snapshot, 15w31c, to 1.8.6 and nothing works AT ALL. The list of commands I've tried: /testfor @p ...
1
vote
2answers
3k views

How to test for time of day with command block in Minecraft

I'm trying to setup something similar to the MindCrack team's current server set up for my single player world so that the world border expands slowly as I play the game. I already know how to work ...
0
votes
1answer
102 views

/testfor (Minecraft PC)

I've created a dummy objective, 'time' and have a 1 second repeater clock adding 1 to the score for @a every second. I then have a command block that will execute a /testfor to check when the score ...
1
vote
1answer
1k views

Trigger command blocks remotely?

I am currently working on a minigame, and I am trying to remotely trigger command blocks. Is there any way to use a lever and a command block to activate another command block 4K blocks away? For ...
0
votes
2answers
137 views

Teleport a player to face an entity?

If I have an entity, is it possible to teleport that player to face the entity without teleporting the player to the entity (Just changing his rotation)? How could I accomplish this?
17
votes
5answers
9k 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 ...
0
votes
2answers
179 views

Testfor block with custom name

Ok so what I'm doing is making "magic blocks" Whereas if you are standing on a specific block it gives you a potion effect like speed, instant health, strength, etc. The only problem is while trying ...
-1
votes
1answer
23 views

how to use score_-_min on effects

I'm trying to give effects to a player who is holding a certain sword using scoreboard objective but the command block literally just does absolutely nothing, it doesn't even give an output
1
vote
1answer
81 views

Clearing Items with NBT Tags

I'm making an adventure map in Minecraft. I've been trying to make a key that opens a door and then deletes itself from your inventory. I got it to work flawlessly without NBT tags, using a trip-wire ...
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1answer
44 views

How do I make a command block output a Redstone signal when it is successful?

I want to know how to make a command block output a Redstone signal when it is successful.
16
votes
5answers
9k 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 ...
18
votes
5answers
23k 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 ...
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votes
2answers
134 views

How do I make redstone repeaters work?

I have tried to have redstone repeaters, to keep my redstone chain going, but it doesn't work. How do I make it work and why dosen't it work?
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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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vote
4answers
26k views

How do I use the /kill command to ONLY kill mobs?

I have a Redstone Power loop that connects to a Command Block that is set to kill all entities except for myself (/kill @e[type=!Player]), because I'm building a creative map, but don't want slimes ...
0
votes
1answer
30 views

How would I testfor players scoreboard amount in a specific location?

I have been trying to find a way to testfor a player with a score of 1 in a z.y.z.r location. what I've tried was /testfor @p[X,Y,Z,R,score_Var_min=1,score_Var=1] but it doesn't seem to want to work. ...
0
votes
2answers
205 views

How to /setblock a specific type of redstone (Debug mode) | Minecraft

I've had a look at the new hidden world type on 1.8, and I've just wondered how to get a type of redstone that goes up in the north part of the square, and I want to use the /setblock command to ...
0
votes
2answers
498 views

How to place redstone using Command Blocks

I used this to place redstone: /setblock -624.5 244 -1692.5 redstone 0 replace It gives an error saying that there is no such thing as minecraft:redstone. I tried many different things and nothing ...
1
vote
1answer
2k views

How to destroy a chest using redstone in minecraft?

I am acquiring emeralds. I am having the issue that if I destroy 4 double chests of paper at my location with a pickax, I can't run through it all (i.e. exchange the paper for emeralds) in time ...
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1answer
380 views

How to make a chest open with redstone or command

I have Minecraft 1.8.1 in creative mode and I would like to make a chest open visually, using redstone or commands, without touching it.
0
votes
1answer
141 views

Creating a minecart spawner that had blocks riding them

I know how in 1.7 you can summon a minecart that has a block "riding" it, as in you can change the block's height above it, what block it is, etc. I also know how to make a minecart spawner. How can ...
2
votes
1answer
146 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 ...
0
votes
0answers
10 views

Greg's SGcraft stargate redstone issues

I am using Greg's SGcraft for minecraft 1.7.10, and the stargate is supposed to output a redstone signal when active. It does that, but when the gate turns off, the repeater stays active unless I ...
2
votes
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 ...
2
votes
3answers
860 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 ...
0
votes
1answer
45 views

Using spreadplayers to tp them to armorstand in unloaded chunk

I'm making a new public server. Right now, I have a book with set home / go home / tp to Spawn functionality. The set home uses a trigger that places an invisible armor stand named Home (and deletes ...
3
votes
1answer
66 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 ...
0
votes
2answers
48 views

How to activate a lever with another lever?

I am trying to build a Wimpy in minecraft, and it uses a rail system to deliver food. I have two sides of the restaurant, but one rail switching between the two sides. A redstone torch doesnt work, so ...
2
votes
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.
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2answers
128 views

How can I make my far away command blocks work

I have command blocks on my adventure map, the map is partially parkour and has no ground just floating islands, I don't want people too see the command blocks so I put them 200 blocks away and ...
15
votes
3answers
5k 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 ? ...
1
vote
1answer
75 views

Why Won't This Work?

I'm trying to make an RPG adventure where the player can interact with different stuff. For example, if he walks up to a crafting table, then this text should come up in chat: [Robert:] I wish there ...
4
votes
2answers
67 views

Most compact way to connect pressure plate and piston

I am trying to make a mob spawner trap with instant fall to lava lake. The actual thing I need to connect is (the block below piston isn't needed): I figured out double negation connection with ...
1
vote
1answer
64 views

Can you make retractable sticky pistons, while extended, in Minecraft?

I was wondering if there is a mod or something to allow sticky pistons that are extended to be pulled or pushed by other pistons? There must be a way to make this work, because trying to make a ...
3
votes
2answers
112 views

Why does extended piston become stuck if air above it is powered?

To reproduce this problem make layout like this and then power the piston. Once the piston is extended, removing the power source will not retract it: Since piston head block is transparent, I see ...
2
votes
4answers
409 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 ...