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

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1answer
103 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?
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2answers
235 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 ...
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1answer
1k views

Execute or Testfor a named dropped Item?

I have a contraption set up where if I drop a player head named Camera1 (it looked very much like a camera) a clock will find it and replace it with an armor stand that is also wearing the head. It ...
3
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1answer
1k 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 ...
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1answer
204 views

Is there any way to test if a Players inventory is not full in Minecraft (No Mods)

Is there any way to test if a player's inventory is not full (eg. atleast 1 empty slot anywhere in the inventory, not counting Armor Slots) with command blocks and whatnot? Update 2: I found /testfor ...
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2answers
507 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 ...
4
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1answer
222 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 ...
3
votes
1answer
286 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 ...
19
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2answers
702 views

How to make 20 minutes (1 day) delay?

I am getting tired of manually managing my chicken farm, so I have invented this automated design: The step from eggs to chicken is easy, and it's even simple to make it happen in batches - every ...
2
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1answer
87 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
306 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?
5
votes
1answer
110 views

How do I make the time between dispensers longer and random?

I have five dispensers shooting out chickens (it's for a minigame). I've been trying to figure out how to make them drop randomly and not so fast. The image below is my current set up... As you can ...
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1answer
122 views

How do I make a mob riding another mob and make the rider invisible?

I want to have an invisible blaze riding a bat so it looks like a bat is shooting fireballs. If I do /summon blaze ~ ~5 ~ {ActiveEffects:[{Id:14,Amplifier:1,Duration:999999,{Riding:{id:"Bat"}}}]}, it ...
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1answer
162 views

Can I make a redstone clock that detects certain words? [duplicate]

I made a vanilla minecraft server and I made a redstone clock attached to a command block with /testfor that detects players. Can I change the /testfor from detecting players to detecting certain ...
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2answers
4k 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 ...
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1answer
155 views

How do I make the comparator work and then stop?

I made a redstone clock that involves a command block with /testfor and a comparator attached to it. Whenever the /testfor works, the comparator turns on, but completely.(meaning it does not turn off ...
4
votes
3answers
1k views

How do I make a rain detector on Minecraft?

I am making a server and it rains a lot. Rain lags up my computer so every time this happens, I have to type in /toggledownfall. Is there a way to make a simple redstone creation that detects rain, ...
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vote
2answers
187 views

How would I make a commandblock do setblock at a certain player

I was using setblock a lot and playing around with it, until I came with the idea, what if I could use setblock to make a game like Runner, from Mineplex, to make the blocks disappear when they run ...
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1answer
72 views

Coordinate of player standing on a certain block

Im new to mc commands and im building a parkour where if a player falls on a red wool that particular player needs to be teleported to the start of that level. the problem is that many players can be ...
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2answers
216 views

Minecraft: using scoreboards as varibles

In my minecraft map, I have a scoreboard, mainvars, that I made by running /scoreboard objectives add mainvars dummy, that has 1 player called var I made by running /scoreboard add players var ...
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5answers
3k views

How can I make an automatic cobblestone breaker?

Is there a way to break blocks with a redstone/piston system and then pick them up with a hopper in vanilla Minecraft. I want to make an automatic cobblestone breaker. I know that I can break sand, I ...
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2answers
732 views

How to put a redstone block in clock mode?

I saw this video by SethBling. (The video is caught up to the moment of my question) He says "Make sure these are in clock mode" what does he mean by clock mode?
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1answer
363 views

How do I make a day/night automatic double door?

How do I make a double door which opens and closes depending on whether it's day or night?
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2answers
118 views

How do you activate different redstone currents each time?

For a map I'm making, there's a "Palm Reader", represented by a villager. When you throw a diamond into a nearby hopper, it gives you a fortune. Is there a way to activate different /say command ...
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2answers
255 views

how do I trigger a /setblock command without a /testfor?

In my map, the player goes to sleep, then wakes up and finds the windows are changed from regular panes to red ones stained with blood. But if I do /testfor, it will trigger whenever the player passes ...
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1answer
49 views

Why wont /testfor work?

I've been trying to do /testfor @a [r=5] for something, but it wont work! It just gives me an error message like "Data tag" something something "Unexpected "[" as first char." I've done the command ...
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votes
2answers
344 views

What's wrong with my command? (might be me or a bug)

So I have this simple setup to show what the problem is: this command block checks for a quartz block above it: this one checks if the left command block's previous output is true: But then when ...
2
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2answers
307 views

RPG-esque Area Names on Entry in Minecraft

So the title command lets you put a fancy thing across people's screens like you might see in some RPG. I'd like to use this as a way to give names for areas in my adventure map- for example, they ...
3
votes
3answers
256 views

How to make a Pulse only activate on the second time activated?

I've hit a problem while making a map. I want one command block to activate on the the first pulse but another when I hit the button a second time. If there are any Redstone pros out here then could ...
0
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1answer
120 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 '...
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vote
1answer
708 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 ...
0
votes
1answer
320 views

make player inable to deal damage to someone minecraft

Ok so I made a mechanism where if you get hit, you get hit by lightning. However all the redstone freezes and stays on if you spam it. Because it test if you have stat.damageTaken and if it is 1 or ...
2
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1answer
164 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 ...
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1answer
913 views

Minecraft Redstone detecting players standing on a block in a radius!

So, basically, I need to make it so that if a player is standing on a block of black wool in a radius of 50 (from the contraption), it will kill them instantly. how is this possible, if at all? I can'...
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1answer
29 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
3
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1answer
96 views

What tick is right before 0? [duplicate]

I have tried using /time query daytime to find out an estimate but I am trying to make a redstone Calendar and I need to activate it right before daytime tick 0 so I can restart the Tick Counter. /...
1
vote
1answer
105 views

Minecraft piston door is only shut when lever is on, but how do I turn it off with another lever?

This is a frequent problem I've been having with the designs of some doors. Basically, the door, to be shut must have its redstone to be powered by a lever. So when I want to enter my house I must ...
1
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1answer
357 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 ...
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2answers
284 views

Minecraft 3x3 piston doorway

What is the most compact and simple way of making in Minecraft a 3x3 piston door?
1
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1answer
71 views

Inclusive redstone repeater

So, I have this: Now, what I want is a repeater that would work while keeping the unlit lamp on. Yeah, that one right there: I have this already: ...but the piston turns on and off ...
3
votes
4answers
3k 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?
2
votes
1answer
155 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 ...
0
votes
2answers
317 views

Activate clock only when command block output is true

I'm trying to activate a clock when a player looks south. I got the command for it, but when I try to make a comparator clock even if I'm not looking south the comparator clock is still going, so how ...
5
votes
4answers
91k 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
2answers
1k 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 ...
0
votes
1answer
174 views

Add multiple commands to a single command block, and alternate with +/- redstone power

I am playing around with command blocks, and I just wanted to know if you could have multiple commands in one command block. If you can, is it possible to have one of the commands active when the ...
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1answer
185 views

Minecraft - Implement Random Access with Redstone

I'm trying to build a machine in Minecraft that will act similarly to an array. It will be implemented using physical blocks, not using a traditional redstone CPU type architecture of redstone signal ...
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2answers
85 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?
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1answer
2k views

Place block in Minecraft with redstone?

I'd like to get ore, and place it (without command blocks) anywhere near the contraption. My question is could it be possible to do this, and if so how? Note: it does not matter on the timing the ...
4
votes
1answer
376 views

Creating Quests with Command Blocks: Problem Testing Unset Objectives

I've got a Realms server, and I'm trying to create a series of quests that people can complete to up their overall "Defender of the Realm" score. However, I only want them to be able complete each ...