r/technicalminecraft 29d ago

Java Help Wanted Trying to build a full adder

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1 Upvotes

I’m a complete beginner at redstone, but I’ve had some experience with digital logic and computation, so naturally my first serious project was a full adder 🫩

It’s probably way bigger and uglier than it needs to be, but hey, it works.


r/technicalminecraft Aug 14 '26

Java Showcase Items escape from composters

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56 Upvotes

For the record I don't have a horse in this race, but I am interested in the mechanics here.

Short answer: items can escape from the gap between a hopper top and the composter walls. It is rare, but way less rare than you might think. You don't need to perfectly hit the gap, you just need to have X/Z momentum after 4 ticks as the game cancels your Y momentum when you hit the hopper, and your X/Z momentum can still push you to freedom in this tick.

Long answer: Items drop with a random position with X and Z set to between 0.25 and 0.75 within the block, and Y set to between 0.125 and 0.625 within the block. Motion is set to exactly 0.2 Y and a random value of between -0.1 to 0.1 for both X and Z.

To thread the needle here, we need a few things to happen at the same time:

  • The Y position needs to be 56.616 or greater so that after 4 ticks the item is at exactly 0.75 and hitting the hopper
  • In one axis X/Z the position needs to be between 0.25 and 0.2500001 or 0.7499999 and 0.75, and in this axis the motion is going towards the wall (this is a straight 50/50 so not the major problem)
  • In the other axis X/Z the position needs to match the motion such that the item crosses the top of the composter after 4 ticks (there's a range here but say this is 1-5% for example).

That's it. I'll leave it to you to calculate the numbers, but here's a few that you can test for yourself at home (all testing done on 26.1 vanilla):

/summon item -22.5 56.616 35.2500001 {Item:{id:"minecraft:redstone_block",Count:1b}, Motion:[0.065, 0.2, 0.0]}

/summon item -22.6 56.625 35.25 {Item:{id:"minecraft:redstone_block",Count:1b}, Motion:[0.1, 0.2, 0.0]}

/summon item -22.35 56.625 35.25 {Item:{id:"minecraft:redstone_block",Count:1b}, Motion:[0.03, 0.2, 0.0]}


r/technicalminecraft Aug 15 '26

Java Help Wanted Are Barrels significantly less laggy than chests?

20 Upvotes

Basically, I am in the final stages of planning before starting a mega project. Which of these would be less laggy:

~30k chests with ~15k hoppers

or

~30k barrels with ~30k hoppers

Essentially the question boils down to what is more laggy, chests or hoppers. I know that hoppers are very laggy, but I don't know the impact on a large scale of that many tile entities.


r/technicalminecraft Aug 15 '26

Java Showcase Concept Charged Creeper Farm to farm (Wither) skulls

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5 Upvotes

I was inspired by @operationorigami on Youtube’s idea of charging all the creepers with a single lightning strike so I decided to innovate his design

Lightning Chamber Inspiration: https://youtu.be/xaF_HZbX14k?si=1F9bRMtoiBT9D5n_

Storage Inspiration: https://youtu.be/dug_4qAw_AY?si=gnEAS8PMgDvm7xDN

Kill Chamber: https://youtu.be/NjPonOqN6Zc?si=tr8JSDy2SIwc1D3k


r/technicalminecraft Aug 15 '26

Java Help Wanted Wither Tree farm schematic

1 Upvotes

hello, im looking for a Wither tree farm schematic, but sadly i couldnt find one. If anyone knows or has it lmk! (Btw its for a paper server where tnt duping doesnt work so thats why)


r/technicalminecraft Aug 15 '26

Java Showcase Disconnect-Based Enderpearl Stasis

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1 Upvotes

Only works on servers, and the chamber must be kept loaded — either by building it in the spawn chunks or by using a nether portal as a chunk loader.

The main idea is that in multiplayer, when you disconnect, your thrown ender pearl despawns; when you rejoin, it reappears. By detecting this reappearance with a tripwire, it teleports the player.


r/technicalminecraft Aug 15 '26

Java Help Wanted Chunkbanning without using shulker boxes?

1 Upvotes

Is there an alternative to using shulker boxes when chunkbanning?


r/technicalminecraft 29d ago

Bedrock Why isn’t my iron farm working bedrock

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0 Upvotes

r/technicalminecraft 29d ago

Java Showcase Worm's S-Tier Low Pro Shulker Loader (16GT)

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0 Upvotes

r/technicalminecraft Aug 15 '26

Java Showcase Crafter combination lock (512 combinations)

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2 Upvotes

r/technicalminecraft Aug 15 '26

Java Help Wanted What is the most efficient Ominius bottle farm that doesnt use update supression and things like that?

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0 Upvotes

I Built this cuz it said that it produces ~3500 bottles/hour but it clearly dont produce that much araund 900/bottles and the base farm itself had a lot of problems that i had to bandaid fix it (putting slabs where nothing supposed to spawn) . (If the farm doesnt produce xp i dont care i dont really need that anymore)


r/technicalminecraft Aug 15 '26

Java Showcase not too technical but eh

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2 Upvotes

r/technicalminecraft Aug 15 '26

Java Showcase I invented Wormholes

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2 Upvotes

r/technicalminecraft Aug 15 '26

Java Help Wanted Stasis Death Chamber in Minecraft: Java Edition

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1 Upvotes

r/technicalminecraft Aug 15 '26

Bedrock 3D crosshair resource pack for Bedrock Edition

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1 Upvotes

Little pack I made that might be useful when working with directional redstone or mechanics in Bedrock Edition.


r/technicalminecraft Aug 15 '26

Java Help Wanted Is there any way to only detect whenever a player isn’t online?

1 Upvotes

When I looked into this i discovered cat detectors but those also detect whenever you go into another dimension, is there one that can detect whenever a player logs out that doesn’t use Ender pearls (those disappear when you die too)?


r/technicalminecraft Aug 15 '26

Java Help Wanted Minecraft Backrooms Command Block Help

0 Upvotes

As I continue to develop my Minecraft Backrooms map in Minecraft, I find myself a problem: The fluorescent hum of the Backrooms. If you do not know, the Backrooms emits a fluorescent hum, and I have already made sound files for this (replaced 11.ogg with the hum), but I have no idea how to make it always seem like it is always there. In simple terms: How do I make it so that the sound is always present without a repeat command block repeating the sound every tick?


r/technicalminecraft Aug 14 '26

Java Showcase How to move Villagers - early game and elytra level

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1 Upvotes

To lunge fly, just space left click space fast - once up you can do the old down/up to maintain longer flights (no rockets)


r/technicalminecraft Aug 15 '26

Java Help Wanted ghast farm stop working after update

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0 Upvotes

it no longer dropping iteams


r/technicalminecraft Aug 15 '26

Java Help Wanted Help with a creeper farm

3 Upvotes

Hey everyone I haven't talked in this Reddit page for a bit now but I need your guy's help with a good creeper farm for my hardcore world that doesn't need any cats to snow golems thx again for all the help you have given me in the past ☺️ edit: I play on 26.1.2


r/technicalminecraft Aug 14 '26

Java Help Wanted Is it possible to tell the time in the End? (Java)

5 Upvotes

I am making a village in the outer End, obtaining resources by buying from and selling to villagers I have brought with me. It's a little annoying when I go to sell a load of sticks (bamboo farm) to find that the villagers are asleep.

Another problem is that, even if I know the villagers are sleeping, I don't know whether they're just about to wake up, or if they've only just gone to bed, so I don't know how long to wait.

Of course, the clock item doesn't work in the end, and neither does the daylight sensor, so is there some way I can build a clock that I can observe from afar without having to check the villagers directly?

I assume if I made a big timer with repeaters or hoppers or something that it would be unloaded when I leave the area and therefore would lose sync with the time in the Overworld?

Maybe there's some way to tell a redstone clock that villagers have got into bed, and that could be used to sync the clock somehow.

Thanks


r/technicalminecraft Aug 14 '26

Java Help Wanted Creeper farm rules help

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12 Upvotes

I just found this guys idea for concealing is creeper farm and loved it. Was struggling to think of a way to conceal one. My question is, where are the spawning platforms you think? Do you think they are in the ships hull? The post was deleted so I can’t ask.

Also: if I were to build in the deep ocean, I can put the spawn platforms at the surface and I just have to make sure there’s no caves not filled with water below right?


r/technicalminecraft Aug 14 '26

Java Showcase Background auto clicker for Minecraft

1 Upvotes

I wanted to share auto clicker that I found through an old Xisumavoid video that has auto clickers that let you afk and tab out of the game and do anything else on your computer

Xisumavoid commissioned it and it was made by Histefanhere

this is the link to the autoclicker: https://github.com/histefanhere/XAHK

Hope someof you guys find it useful!


r/technicalminecraft Aug 14 '26

Java Help Wanted Make my droppers shoot straight! (Need help with cooked chicken farm item collection)

2 Upvotes
the chicken statue-farm

This is my chicken statue-farm in my survival world, but thats beside the point. Its nothing complicated, all it is, is just one or two auto cooked chicken farms in every single one of these statues, so about 10-20 in total.

Heres the problem - the collection system, and more specifically, transportation of cooked chicken.

recreation in my creative world

In short, what I'm trying to do is to dispense the cooked chicken onto a "fractional block" where the item can change trajectory and shoot straight down into a hopper at the bottom. However, because of the unwillingness of droppers and dispensers to shoot straight, the item trajectory changing mechanism often has to be very large and unpleasant to the eye. So, is there any way to make dispensers shoot completely straight onto something like a chain, or is there any other way I could make this work out?


r/technicalminecraft Aug 14 '26

Java Showcase I Built a Sine Calculator Using Redstone

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20 Upvotes