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

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1answer
679 views

What do noteblocks do?

I have been playing Minecraft for some time, and am pretty good with redstone. However, I was spamming the Random Page link on the Minecraft wiki and came across the Note Block page. Of course, the ...
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2answers
2k views

How can I make automatic lighting in Minecraft?

I have been trying to create a redstone system for my "town" on multi-player and was using some guides on creating automatic lighting using redstone, water, and pistons, but it is not working properly ...
3
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1answer
245 views

How to /testfor 10 wheat [duplicate]

I am trying to /testfor 10 wheat anywhere in the players inventory. I have tried this command: testfor @a {SelectedItemSlot:0,Inventory:[{Count:10b­,id:minecraft:wheat}]} But it gives me this same ...
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1answer
54 views

How do I do a /setblock for under a player?

I'm trying to make a vanilla spleef arena, with a redstone clock attached to a /setblock command. No matter how I tried, I could not get the command to set the block under the player air. this was the ...
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2answers
479 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 ...
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2answers
581 views

Why do two identical redstone contraptions not do the same thing?

I was experimenting with redstone manage to build the first example were everything works thine. I've built the exactly same thing in my building but there it won't work any ideas why? (the delay is ...
3
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2answers
325 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 ...
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2answers
2k views

Redstone rendering far away from player

When I create really big circuits and I go some distance away, the redstone mechanisms stop working and freeze. And if I come back they are still frozen. I have to click on a wire or repeater and ...
3
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1answer
29 views

What Specific Blocks are needed for Turing Completeness?

Let's say I want to make a shop with all the redstone components required for Turing-completeness. Since we know Minecraft is Turing-complete, what are the basic blocks required? Ex: Comparators might ...
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3answers
209 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 ...
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3answers
12k views

Is there a way to display a player name in /tellraw command?

like the title says, I'm looking for a way to display a player name in a /tellraw command which is run by a command block. Example: /tellraw @a {"text":"","extra":[{"text":"A player has won the ...
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2answers
2k views

I need to be able to press a button multiple times but only have one output

I want a button that, when pressed five times, outputs a signal. What redstone device should I use?
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1answer
589 views

Is there a new fix to restart redstone clock

I think everyone in this section knows about redstone clocks, and that sometimes when you log in and out, the repeaters get stuck. Sometimes they get stuck when you are just a little but far away or ...
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2answers
42 views

How to detect if a mob has been hit in minecraft with command blocks?

i am making a boss battle for my minecraft adventure map, and using a mob spawned with commands as the boss. When the mob gets hit, some command blocks will give the player a potion effect, but I ...
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2answers
136 views

why will my hopper not move items to the next hopper?

I have one hopper connected to the other, and the other to a chest. I know I have them connected correctly, because the second hopper deposits into the chest perfectly. However, items do not transfer ...
3
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1answer
94 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. ...
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1answer
1k views

Automated Crop Farming

I am wondering how would I automate this underground farm so I can flick a lever and have it all collected by water like for Sugar Cane and Wheat or Pistons for say Pumpkins or Melons.
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1answer
6k views

How to testfor blocks not people

how do I testfor blocks? like if I put down stone near a command block with a comparator attached to it and it will activate a piston connected by the comparator on the command block? please answer.
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1answer
160 views

Is there a way to guarantee every block is collected in info obsidian?

I have an info obsidian farm, which I'm trying to set up to AFK. Unfortunately, I seem unable to guarantee every mined block is picked up by my hopper system. In the image below, I have a minecart ...
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3answers
5k views

How do I move redstone signals vertically (for a vertical sticky-piston door)?

I'm trying to make a variation on the sticky-piston hidden door, in which two sticky pistons are activated by a pressure plate in a corridor to reveal either a hidden room, or a treasure chest, or ...
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1answer
2k views

How do I make a pulse generator in minecraft Xbox 360?

Previously, I tried hooking up a "rapid pulser" to some dispensers, but it failed miserably (never lasted for more than 2 or 3 seconds) so I decided to try out a 1 tick "repeater clock"hooked up to ...
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2answers
2k views

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
2k 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
2k 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
1k 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
465 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
16k 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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2answers
171 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 ...
3
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1answer
267 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
702 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
111 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
votes
1answer
625 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
162 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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2answers
2k 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 ...
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2answers
407 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 ...
3
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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 ...
3
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1answer
47 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 ...
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2answers
109 views

How to detect if a command block is outputting a redstone comparator signal?

I want to make a pretty much redstone-less contraption, so I want to detect a command block's NBT data, so that when it gives out a comparator signal, another command block detects that and then does ...
3
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1answer
156 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 ...
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1answer
150 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 ...
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1answer
889 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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2answers
2k 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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votes
3answers
5k 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 ...
2
votes
1answer
331 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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votes
3answers
370 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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votes
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
495 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
7k 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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1answer
685 views

Confusion on Redstone Wire Transmission

According to the wiki on Redstone Circuits: Redstone Wire powers itself, the block below it, or the block it is pointing to. I'm having trouble understanding what this is saying. According to the ...
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2answers
7k 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: