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

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-1
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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
-5
votes
0answers
23 views

What are good redstone creations in minecraft [on hold]

I wanna make redstone things and when I search up stuff on the internet they give me nothing so I need some people to tell me some or give me to a link to a video or website to give me good redstone ...
0
votes
1answer
40 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
1answer
52 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 ...
1
vote
1answer
25 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 ...
-2
votes
2answers
111 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?
2
votes
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 ...
2
votes
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 ...
1
vote
4answers
19k 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 ...
2
votes
3answers
10k 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
25 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
151 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
236 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 ...
0
votes
1answer
337 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
123 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
88 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
9 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
49 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
824 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
27 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 ...
0
votes
0answers
56 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 ...
2
votes
1answer
49 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 ...
16
votes
4answers
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
34 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.
1
vote
2answers
90 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
69 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
54 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 ...
0
votes
2answers
122 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
vote
1answer
63 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 ...
0
votes
1answer
90 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 ...
3
votes
2answers
79 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 ...
0
votes
2answers
99 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?
2
votes
4answers
391 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 ...
1
vote
1answer
45 views

Select player that does not have a specific score set

I want to select all players that do not have a specific scoreboard objective value set. I have tried doing testfor @a[score_hasJoined=] and testfor @a[score_hasJoined_min=], but it still won't work. ...
6
votes
4answers
365 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 ...
0
votes
1answer
54 views

Redstone NOR gate with one of two inputs adjacent to output

I have a design issue with creating a NOR gate. I have a sticky piston facing upwards and a block immediately to the side and one unit above it with a stone pressure plate on top of it. About 6 or 7 ...
0
votes
2answers
50 views

Minecraft - Executing on an entity is not working

When I put in this command in a command block: /scoreboard players set @e[type=Item] PigProgress 1 {Item:{id:319}} It says: The dataTag does not match for c97c9605-6b59-44e8-bf24-aa2e46c9c746 ...
0
votes
1answer
73 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 ...
0
votes
1answer
45 views

How to set a command with a comand block?

I want to set a testfor commandblock. This is the command I want in the block: /testforblock 1998 10 657 glass. What is the setblock command to have this in a commandblock?
4
votes
1answer
2k views

How do Minecart with Hoppers work?

The Minecarts with Hoppers are very confusing and after looking into Minecraft wiki page I couldn't find an answer on how I should use the hoppers. What are some of the uses for Minecarts with ...
0
votes
1answer
45 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: ...
1
vote
2answers
381 views

execute command setblock

Ok so when you throw a snowball I have /execute @e[type=Snowball] /setblock ~ ~-1 ~ minecraft:ice' So this makes an ice path following under the snowball. I had some code something like this and ...
3
votes
1answer
40 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 ...
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
2answers
88 views

Vanilla 1.8 detect new player

In vanilla 1.8 using command blocks, is it possible to change a player's spawn point after they first join a server? When a player first joins a server they are in location "A" When they press a ...