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

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6
votes
3answers
2k views
+50

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 ...
1
vote
1answer
38 views

How do I make a slow clock without taking up space?

I'm making a minigame where a player has to survive in essentially a world of hell. I am creating a "water bar", where players must drink to survive. It is a dummy scoreboard objective. I want to run ...
0
votes
2answers
294 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 ...
0
votes
2answers
60 views

comparator problems

While I was playing with some redstone tried to make a money system to sell iron. However when I power the command block with a button, the comparator after it stays on. the command being run is: ...
0
votes
2answers
277 views

Can I store more items per block then a Chest?

Would there be a way to store more items per block then a Chest, for example, using some Redstone/commands? I need to store 60'000 items (stackable by 64) in minimal space - less then the 35 Chests it ...
7
votes
2answers
396 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 ...
2
votes
1answer
99 views

Redstone circuit that activates on short pulse and does not activate on longer pulse

I made a circuit that activates on a long signal but I am missing one that activates on a short pulse and does not activate if the pulse time exceeds a certain pulse. Everything I made still activates ...
1
vote
2answers
2k 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
1answer
48 views

How to remove a certain amount of something from someone's inventory

In a map I am making, to enter a certain place someone must have 3 iron ingots to enter. I've tried using the /clear command, but if they have more than 3 they lose it all. Any ideas on how to fix ...
1
vote
2answers
2k views

How to set Command Block(s) to test for a particular time and output a message?

I simply want one command block to test for the time of day or night (e.g. time = 18000) and output a message in the chat to everyone if that time returns true. I was trying a simple set-up with two ...
2
votes
3answers
5k 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
35 views

How to assign players in MC to a scoreboard team automatically when they join?

I am yet again needing some help with making my Minecraft: Hunger Games map and in order to teleport each player to their podium, I set up a group of 24 command blocks setting them to teleport each ...
1
vote
1answer
50 views

Using Minecraft command blocks to automatically TP players when they join?

I am trying to make a Hunger Games map on MC 1.5.2 and I am almost finished. I have most of the command blocks set ready for the games but for some reason, everyone keeps spawning on top the glass ...
1
vote
1answer
26 views

/testforblock command not recognizing items in the chest

In my custom map there is a point where the items in the chest have to be tested, so I wrote this command: /testforblock -17 105 198 minecraft:chest 5 ...
2
votes
1answer
40 views

Power golden rails from minecart(placing rails in large scale)

Is there any way how to power golden rails from within minecart? What I mean is placing rails on the go and also some way of powering them immediately. To place them on the go is easy, I just put a ...
-3
votes
0answers
31 views

Testfor error! Need Help

Hi I need to know if a payer is standing in a coloumm and if so all players need to be teleported to an area. Thanks
3
votes
2answers
60 views

How to stop fire from going out without netherrack

I want to set a hopper on fire on Minecraft, but I don't know how to keep it burning. Any ideas? (I'm not good with commands)
3
votes
1answer
105 views

How can I test for a totally empty inventory

I am making a custom Minecraft map in which I need to /testfor if a player has a totally empty inventory. I tried Googling but I didn't get any results. So if anyone can help me by providing suitable ...
2
votes
1answer
41 views

How to test for if all players of a particular team are on a particular area? [duplicate]

I'm making a minigame map in Minecraft and I cant figure out how can I test if all players from a particular team are in a particular area using Command Blocks (with a radius of 8 blocks, if all ...
4
votes
3answers
104 views

Vertical redstone crossroads

I have 2 redstone signals that are unavoidably going to cross each other vertically (i.e. One is horizontal and the other moves vertically through it). I ideally need a way to have these signals pass ...
3
votes
2answers
103 views

Minecraft, random number generator?

Does anyone know how to modify that random number generator, so that it will get only one lamp on? I can't use command blocks.
3
votes
1answer
194 views

Determine Minecraft item type from entity or inventory?

I have a dropper which can contain, of course, any items. Assuming I can already target this dropper in a command's target selector, how can I determine what item is in the first slot of its inventory ...
1
vote
1answer
157 views

How to change scoreboard score if player does not have item in his inventory?

I want to make a killstreak award system. for that I need to be able to make a player choose to use his killstreak points to get an ability/potion effect or open a certain gate. I wanted to make the ...
1
vote
1answer
124 views

How to right click items repeatedly with redstone/command blocks (Minecraft)

I have made a command block system that testfors when you have a blaze rod in your first slot and it's highlighted. If this all comes out true, then it will summon an armor stand, where another ...
4
votes
1answer
54 views

Signal directing on lanes

I'm constructing a minecart trainstation and as you will have guessed, that involves 15 lanes of adjacent redstone wiring. In my station, there are many instances in which I need to power other lanes ...
6
votes
2answers
859 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 ...
1
vote
2answers
4k views

How do I separate redstone signals in minecraft?

I am trying to create a row of buttons all right next to each other, but no matter what I try, I can't separate the redstone signals. If I press one button, all the cables turn on because they're next ...
24
votes
3answers
48k 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 ...
15
votes
2answers
7k 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 ...
3
votes
2answers
54 views

The title command in a execute command

I can't use a /title command in a /execute command. Like this: /execute @a[score_Health_min=0,score_Health_max=1] ~ ~ ~ /title @a title ["",{"text":"/!\\ You Died :( ...
3
votes
1answer
211 views

Why won't this redstone and command block setup work like the other one?

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 ...
0
votes
2answers
62 views

Is there a way to set the rotation of an entity relative to another entity?

I want to make it so what ever direction I look a specified entity looks in that direction as well. Is there a way to do that?
0
votes
1answer
39 views

Scoreboard value in floating text

Is it possible to have a scoreboard value in floating text (invisible armor stand with nametag)? I have really no knowledge of scoreboards. I'm using this generator.
-2
votes
3answers
48 views

How to get testfor to go on and off as I please

I am making a map with friends and I set up a shop keeper to say "hello" when you get within a few blocks, but it has some bugs I would like help with: I am trying to get it to constant check if ...
4
votes
2answers
85 views

What's going on inside the game when a BUD switch activates?

I understand completely what a BUD switch is and what purpose it serves. But what within the game is happening when a BUD switch works? What allows it to work and what is the game thinking?
-5
votes
2answers
99 views

Redstone experts: How do I build a device to pull items upwards?

I'm trying to make a quarry, as in some quarries i've seen you can pull items with a device which is upstairs. OFC i've read about the dropper elevator, but that one has the redstone circuits ...
5
votes
3answers
140 views

Minecraft execute tellraw's clickEvent from original entity, not player

I'm using a command like this: /execute @e[type=ArmorStand] ~ ~ ~ tellraw @a[score_goto=-1] { "selector": "@e[type=ArmorStand,r=1]", "clickEvent": { "action": "run_command", ...
0
votes
1answer
43 views

How to setup a scoreboard for items

I am making a map where if you jump on a pressure plate you get 1 paper, how can i make it so when I get 1 paper the scoreboard counts it and then displays it and also how do i make it so if I drop 1 ...
0
votes
1answer
24 views

Minecraft scoreboard targeting all entities when filtered

Ok, so let me explain. I have 3 scoreboards set up: use, which tests for when a player breaks an emerald block, att to move the use score over to, and targ which is set when someone is being targeted, ...
2
votes
2answers
8k 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 ...
2
votes
1answer
79 views

How do I make the player name show up on a /tellraw command?

So I am currently making a minecraft custom map (for 1.9). I want to make the player "say" something using /tellraw commands. I did figure out how to make the player name come up using /say commands, ...
4
votes
1answer
66 views

System with multiple inputs, but when one is activated it disables the other inputs

I am currently working on a bank system. However, it cannot accept multiple inputs at the same time (through multiple ATMs). So I made it so that every ATM will output a signal when a user has ...
2
votes
1answer
38 views

Minecraft: Testfor movement after Eating

I'm having trouble with commandblocks, so here is what I want to do: I want to create a system that teleports you away upon eating bread. I know how to test for a player who is eating the bread using: ...
2
votes
3answers
264 views

Can I make an invisible block which only people with a specific item can go through?

I am currently making a server, and I want to make an invisible block in which only people with a specific item can go through(in this case, a nametag called:key). Is there a command to do so? I am ...
1
vote
2answers
378 views

MC 1.9: Chunk Loader for Redstone Circuits?

I have developed an automatic train system using minecarts and redstone circuits to let the minecarts travel between stations. It worked so far for lines in the near environment. But I noticed that it ...
0
votes
1answer
176 views

How to summon potions on the ground in minecraft 1.9

I am trying to summon potions with effects on the ground in an area with 1.9. I had a command that worked in 1.8: /summon Item 343 5 -641 {Item:{id:373,Count:1,Damage:16452}} But now it doesn't ...
5
votes
2answers
282 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?
1
vote
1answer
58 views

Vertically stacked armor stands should have increasing scores, but don't

I'm trying to make a goalpost system for a custom map I'm designing. The idea is that a goalpost--consisting of a tall stack of iron bars--would have variable height, and at each block up and down the ...
4
votes
2answers
80 views

How do I summon a Zombie that doesn't attack me but attacks the other players?

I am working on a Minecraft map and I came across this. I am trying to make a special ability so that you can summon a Zombie that doesn't attack you but attacks the other players.
1
vote
3answers
459 views

How to reset a command block's status?

I'd like to use a comparator to act when e.g. a testforblock command block attached to a button triggers. But the comparator changes its state only when the button is pressed after the test result ...