INFINITE Furnace Fuel using Crafters in Minecraft 1.21 

I completely forgot that kelp is counted as a 'smokeable' item. Swap out the furnaces for smokers and it doubles the speed if the system. Not that it matters massively, as the bottle kneck is the size of the farm and not the system, but still. FAQ: 1. Could you replace the item splitter with just letting the furnaces fill up? No, because of item elevators - the items would get stuck in the elevator! 2. 80 items per furnace!? Yep - there's a hopper above! 3. Could this be simpler? Maybe, but it's actually really simple, just super compact so it looks more crazy. 4. What if it backs up? Not sure! If I were building this in my own survival world I would have an overflow switch; Or make it so the items divert over the furnace array into a bulk storage system.

crafters are perfect for honey farms, no longer do you need an insane amount of bottles. you can just automatically cycle them :)

Considering how many farms I've seen that require manual crafting to operate, this block is nothing less than revolutionairy.

i may have no idea whats going on or how redstone works, but i sure do enjoy seeing people who do understand it have fun figuring this stuff out.

I'm kind of loving the tiny conflicts between Recording Mumbo and Editing Mumbo

Good news, Mumbo: the accidental BUD issue at 5:45 is a bug that's been fixed in today's 23w43a snapshot 🙂I also struggled with it in my own designs, so glad to know Mojang fixed it so quickly!

I cant wait to see Mumbo somehow use the Crafters to somehow make new flying machine that makes you your tea and colonizes for you

An idea for a follow up video is a bamboo farm that crafts bamboo blocks then crafts bamboo planks to use as fuel. Bamboo planks are a bit more efficient compared to an equivalent amount of bamboo. Love the videos Mumbo!

I don't know if mumbo will see this but you can use smokers to smelt kelp instead of normal furnaces to speed up the process!

It’s surreal how much is possible with the addition of ONE block

2:29 “I could do something with the fact that observers can observe” - Mumbo Jumbo, 2023

One thing I've always wanted is a furnace type that stores its unused heat meter. Would be very useful for lava bucket usage, and would remove your situation at 1:45

I love how whenever a new redstone component is added to the game, we can count on Mumbo making at least 3 consecutive videos about it 😂

This is awesome. Now it just needs to feed into an automatic sorting/storage system so everything you smelt gets automatically organized by item type. Just a full storage wall of exclusively smelted items in silos that you never have to manually sort or find later

I'm glad you're having so much fun Mumbo! There's so much you can do. I'm curious when the "Remote Crafting Table" will be done, presumably from a storage system. There are many ways you could go about it. Presumably you wouldn't need to make it accept an input for every item in the game. You don't use shields or iron pants for crafting. However, things like cobblestone, iron, sand, redstone, and so on you do. Unfortunately, it's difficult to get the items to come out how you want depending on the shape of the item... So really, your best bet is to have an auto-crafter with every pre-set shape that is used for crafting. Then in terms of inputs, you have a series of levers with item frames. Presumably, you can also just have presets for the auto-crafters depending on how many you have. As with any big project, the first step is starting out small though. A 3x3 acts as a 1x1, 2x1, 3x1, and 3x2 all on its own. Then just make a 1x2, 1x3, 2x3, and a 2x2. That's a majority of crafting recipes right there. Armor and tools will be a pain. Though the real challenge likely won't be the size, it'll be getting the items to go to the correct crafter without getting stuck in the wrong pipeline. Or worse, what happens when you put in the wrong recipe. Obviously it's easier to just be given the items, but can you really call yourself a Redstone Expert if you can't craft from 6 chunks away?

I love mumbo's videos so much. I've been working in the entertainment industry for the last week, pulling double shifts running around chasing after kids with puppets and doing crazy voices until my BONES ACHE. So I come home and the FIRST THING I DO is put on this video. When I tell you there's nothing that feels more like home than falling asleep in the middle of a Mumbo video and waking up to a design that is UNRECOGNIZABLE from previous iterations and the phrase "It's really quite simple. As you can see, with this 8-furnace setup here..." I mean it. @Mumbo Jumbo Even when you're taking your breaks, never just fully stop. We all cherish every single video that you make.

The industrial revolution and its consequences

So happy that kelp is finally getting more attention! I've been using it for years and felt like it's been underappreciated.

In a traditional item sorter, advantage is taken of the fact that hoppers pull faster than they push, so items are pushed across until they reach the hopper that will pull it in. I'm surprised you didn't just loop a hopper line or water line around to feed the furnace then push across to bulk storage once the feeding hopper is full.

There's another way to do a completely automatic refueling setup. You combine a moss-based bonemeal farm, an azalea-based wood farm (no need to plant saplings), and an auto-furnace setup that turns that wood into charcoal. That charcoal feeds both the charcoal generator itself (after some initial seeding, of course) and, when full, a separate auto-smelter setup. Absolutely massive setup, which you can see in one of Doc's season 9 videos.

Mumbo: Fairly simple design. What his building: A Millennium Falcon auto-farm.

Coming up next, on Top Lever The gang gets crafty with kelp A minecart becomes quantum entangled And mumbo just can't give piece a chance

Kelp-based smelting was the first thing that came to my mind when the crafter was introduced! Although my version just has a kelp farm and crafter directly connected to a super smelter. The kelp from the farm gets smelted into dried kelp which gets filtered out of the furnaces’ output to be crafted into blocks which go directly into the fuel slot. Looking at your version, maybe having a separate smelter for the kelp might be more efficient, but I kind of liked the idea of everything being smeltable in the same furnace system, kelp and all.

Plot twist: the reason mumbo made a bamboo farm in his s9 hermitcraft base was because he was actually making the world's most efficient unlimited powered super smelter

How about an item filter to just pull out a barrel's worth of kelp blocks that is used to feed the kelp production? Once it's full, it would lock, and any overflow will go into the smelter. It would take a bit longer to warm up and fill the barrel, but feels much more simple and would serve as a nice buffer if it is always on at your base.

in the latest snapshot they added the tick command, it will be helpful to test those types of farms since you can advance time to see if runs without breaking

i dont know why, but i absolutely lost it at "this is whats known as a non-stonks situation" timestamp- 2:05

Loving Mumbo just having fun with redstone, these sorts of things i love to see

When I saw the automatic crafters introduced my first though was of the kelp smelter you designed and how the entire thing could be easily automated for a massive super smelter array.

I think my favorite part about this update is that I spent the last month clearing a nether perimeter for a wither skeleton farm, just for kelp to become an infinite fuel source XD

using the new crafter as a source of a 1-9 comparator output is a spot of genius, I can't wait to see all the ways this will be used to condense large comparator systems!

Using kelp to automatically fuel your smelting system is definitely going to be the future of Minecraft. Thanks Mumbo for another great video!

you could use the smoker for faster smelting

We must take away Mumbo's crafter privelages, he has gone too far.

In Hermitcraft Seson 7 and Mubbo was complaining about how he had to craft all the gold nuggets into gold bars, and I was like "If only there were auto-crafters, to bad Mojang will never add those!"

This is an amazing use!!! My first thought was for concrete farms, would’ve been helpful in the Sahara days. Also crafting shuckers as you need them for farm storage so you don’t. Have it have very much storage for your shuckers.

I think you can use smokers in the upper module to increase the amount of kelp that gets cooked. If not, it will help with backlog

wouldnt making an automatic bamboo farm -> craft into blocks -> use in furnace be easier than having to go through a furnace in the middle for kelp? anyways very fascinating build that i will never be able to use myself

The crafter is such a cool block! I probably won't use it much though, except for honey farms and a furnace system like this. Great video!

This is extremely helpful, thankyou MumboJumbo

0:45 "It's really simple to build"

Mumbo is the type of guy to make a complex machine instead of going and simply mining coal

I love how complicated this is! Lol I would just oversize each stage going down the line and not worry about too much else but this is awesome!

I love the way you do these videos 😍 like we really are along for the ride in trial and error. I learn better playing like this too x

Anyone else really happy that in snapshot 23w43a they added a compact t-filpflop 😮 (copper bulb) (Also the bat model is cute)

decorated pots are perfect for batching, letting items clump up into specific-sized stacks vbefore being fed into other systems. so let a pot cache/buffer kelp so that it reaches the furnace in stacks of exactly what can be smelted with one kelp block

Mumbo, we're absolutely loving the frequent uploads!!

Mumbai you are a genius. The more videos you post the more ideas I get in my head. Thank you.

for the redistributing kelp to the furnaces, just use priority output, allow the system output to draw from the rerouted line only if the input buffer is not empty. then as long as your average kelp production slightly exceeds your smelting capability the input & in-furnace fuel buffers will take care of the kelp production variance too. Sure it'll be a little less efficient but will make the footprint smaller & the circuitry simpler

I already saw others try this lol, was just waiting for you to drop a video about this concept. Minecraft really entered the Industrial Age, never thought it would....

I had that with just me manually crafting the kelp blocks for my supersmelter back in the day. Funny to see you solving the same issues as I had xD

It took this to make me realize that kelp blocks are actually better fuel than coal/charcoal, which is both cool for me because I usually like to play with the Create mod and as such almost always have an automatic kelp setup, but also not that useful for the same reason because you can just smelt/smoke items using Create machines without needing fuel lol. Either way, good to know for when I'm not playing with the Create mod.

the update should be called "Minecraft : The Industrial Revolution"

This would actually be a cool block to use with Create mod, whenever they add compatibility. Imagine the conveyor lines to create more complex items, like muskets or guns. Just mass producing ammo, food, blocks, armor, vehicles… Pair this up with automatic farms for like cobble and anything else you might need, and suddenly you have a Military Industrial Complex on your hands.

I built this leading into a shulker loader and bulk shulker storage. Then my furnace array calls for two shulkers on demand to fill the fuel input double chest when it empties. I tried doubling your smoker/crafter setup by mirroring it, however the kelp input rail at the top of the array is directional - the flipping rail track attached to the detector rail that determines if the cart is empty flips back the wrong way, so it can only be used in the one orientation. Awesome design Mumbo!

"That was easy until it wasn't." -Mumbo Jumbo 2023

instead of separating the kelp blocks 40/60, you could just have it all go to the furnaces and as it saturates the overflow will go into storage. It means a bit of a longer start up time but it self balances.

My first auto crafter idea will go towards making green candles. Cactus farm, smelted by auto kelp blocks (mega experience stack). Place a bee farm ontop or below, and one more auto crafter. You have green candles, multipurpose farm and light source. Larger building. Maybe best to compact it, or keep to first floor of build

Hearing Mumbo say no-stonk situation is one of the most jarring experiences of my life

Mumbo we love your content sir. Please continue! So unintentionally funny it’s insane

Guys, I think Mumbo likes crafters

My answer to the complicated circuitry is just to feed it enough kelp to constantly be full. Thankfully I've figured that out in the past. Suffice it to say that you need roughly 64 kelp/furnace, and that's easy enough to remember. I recommend more in small scale (I use 129 for a singular smoker), but comes out to a fairly clean 63/furnace at large scale (though I always recommend just adding a few to keep up with rng of random ticks).

I have literally been trying to figure out a Miniaturized version of this system since the crafter came out. Thank you for solving my issues.

I love the way mumbo says "Krahftah"

Seeing how efficient the Kelp farm is. You could just save a lot of room and resources at the expense of it being less efficient and losing Kelp

For a small farm, you can have a hopper clock with the fuel burn time that's locked by an inverted comparator signal from the furnace. As long as there's enough kelp coming in, the hopper clock will keep sending fuel on the preset interval.

I love that you’re on the case with the crafters. ❤

An automatic kelp farm was literally the first thing I thought of when I heard of the autocrafters. Can't wait to use it! 😍

I think this will become a staple in most worlds now

Can't wait to watch this! :D

I was waiting for this!

These videos are great and are a big part of why I was excited after seeing the crafter.

That's pretty complex. I think I would rather stick with a bamboo farm but use the crafters to convert the bamboo into planks for increased efficiency.

I love how he was like "in a 4 furnace setup, each furnace will have 80 kelp". I didn't know mojang changed the stack sizes!

I was trying to figure this out! Yes! Thank you mumbo!

Sweet! I didn't thought it would be so complex. Thank you for your ideas! Hope this one will go in the Hermicraft server too

I feel like there has to be a MUCH simpler way to do this. Like a single hopper minecart that travels along a looping track that takes it over both the fuel input and under the crafter output. It would take the kelp blocks from the output and loop around and drop them in the fuel input. (Probably just one block at a time, so it'd be slow unless you do some detector rail stuff that I don't understand.) And the raw kelp would just flow into the furnace directly from the farm.

It's been a couple years since I last watched (mainly due to concessional disinterest in Minecraft), but you've kept the magic as always. Since I stopped watching, I started going to college for electrical engineering. Looking back at what I watched for most of my adolescence, I am not surprised at all about my chosen profession. I would like to thank you for inspiring me to go into a field that I've been quite enjoying.

Wow, the complexity of a first draft. I love seeing redstoners' thought process and knowing we are all just figuring it out as we go.

I don't understand any of this technical mumbo jumbo but I sure do love to watch it anyway

I already have a dried kelp farm. They're incredibly huge and slow. Before my wither skeleton farm completely blew it away. Coal is just a better fuel.

1:51 i before e except after c

The seriousness of non-stonk situation was insane, good job keeping a straight face saying that

Earned my 👍 cuz I relate to corrected and/or possibly-misspelled notations

THANKS🌹FOR♥INFORMATION🥰SIR☺😊❤❤❤ LOVE❣️ FROM🙂 INDIA🇮🇳BHARAT😉

Mumbo Jumbo video = Happiness Crafters = Happiness Mumbo Jumbo Crafter video = Happiness(2) Mumbo Jumbo Crafter video(3) = Happiness(6) I am 600% happy

For small scale automatic smelters, the blaze rods from blaze spawner is a surprisingly good fuel source. I found a double spawner on my survival world and it’s pretty awesome.

Cool idea as usual, I know that it's not likely you'll read this, but after watching the video it gave me a few ideas on how to optimize the design, The issue with splitting the output is obviously quite a bump in the road, personally the way I would've handled it would've simply been to have the output fuel to kelp furnaces first, and then route any overflow to the actual supersmelter, this "bandaid solution." could also let you ignore the whole furnace efficiency issue (if your kelp farm is fast enough to keep your furnaces satiated). Also I believe you can use smokers in this instance as dried kelp is a food source.

I love watching Mumbo use the Mumbo Jumbo block

Man, i cannot wait to see what kinds of machines people are gonna make with this block. This is just the beginning!

I love the way you make these Redstone videos, it feels almost like we’re working through the problem with you, and as a helpful bonus makes me feel a lot smarter than I am 😂

i feel like im back at school while i set and watch without understanding anything but somehow i enjoy MUMBO vids LOL

another great video, mumbo is in an amazing upload streak

no one remembers carpet duplicaters

YES!!! This is one of the first things I thought of doing when they first showed off crafters.

None of this is simple. Your mind is incredible and you are a gift to the rest of us, Mr. Jumbo.

This might be broken or too OP but I wish instead of locking certain slots and having to funnel in items in a specific order with loads of Hoppers that you could just open your recipe book and select the recipe you want and that would lock in that recipe and you could use just one Hopper and chest(s) and the items would just automatically sort into the correct slots.

Or you could just use carpet dupes for the fuel (Only if you want to use dupes of course)

Very good video and farm, but you could have used a hopper to give all the kelp to the farm, and when its full the rest will be deposited in the smelter

Heres a simpler way to detect items. Instead of reading the fullness of the furnace, you instead use a comparator behind a block to detect the fullness of the HOPPER. Since the hopper has 5 slots, which will each stack to 64, thats 310 items, divided by 15 for the maximum signal strength when full, gives us 21.333 items per 1 signal strength. This means once the hopper hits 22 items, the comparator will give an output strength of 2. We can detect that, and activate a small clock that deposits exactly 4 kelp blocks into a smoker, and then, the block between the hopper and comparator is moved by a piston, breaking the ability for the comparator to give an output. This activates an ethos hopper clock, which will run for exactly 400 seconds, as thats how long it will take to smelt 80 kelp in a smoker, since thats how much 4 dried kelp blocks will smelt. A quick google search shows hoppers move items at a rate of 2.5 items per second, so that putting exactly 160 items into the hopper clock will give a timer of exactly 400 seconds. After that, the furnace runs out of fuel, the block is moved back between the comparator and hopper, the clock is turned off, and it is reset and ready for another round of checking.