Comet 107 | Cheap 30 village iron farm (1.13.2/1.12) [Tutorial] (1200 iron/h) @comet1072 | Uploaded 5 years ago | Updated 1 hour ago
Hey, guys. Today I'll show another iron farm. Today's farm is quite small again, only 30 villages. It produces around 1200 iron/hour. This is almost 20 stacks of iron, or a little under 1 beacon base per hour, which will probably be sufficient for most players. The reset takes about 40 minutes.

*important* never reset the farm while it is building the villages. If you did this, you'll have to wait until the redstone is done (about 40 minutes after you started the farm) and reset the doors like shown at 39:41. Also never leave the farm while it is resetting, or it will not build correctly.

I got the idea to use waterlogged trapdoors from a Chinese designer:
bilibili.com/video/av37198509
He used it in a very different way: He had the trapdoors 8 blocks to the side of the doors that he wanted to make valid. This resulted in the doorwings sticking out in a weird way. I was able to prevent this by having the water flow in a weird way. It was a bit difficult to understand and I decided to cut it out, for the sake of a bit more fast-paste video. Anyways, I think he is one of the first, if not the first, to use waterlogged trapdoors for skyaccess.

The farm uses a four step reset, which makes the redstone a lot simpler. however, four step resets come with a lot of restrictions, but it turned out to just be possible while still using few satellite doors.

I had to use a lot of weird tricks to get this farm to work: for example, the water takes a few seconds to flow over the doorwing, and the farm will break if the doorwing-villager detects the doors in this time. So that's why the villagers in the glass tubes are moved up and down so much when the farm is resetting (so they can't register the doors in the doorwing when they shoudn't, it isn't just to make the redstone simpler, it actually is needed to make the farm function properly).

The farm and tutorial are inspired by Eta740 iron farm:
youtube.com/watch?v=K6Yp__KgcZE
Gnembon's village, villager breeder:
youtube.com/watch?v=ky9oeZOUVOA
EDDxample's villager marker mod for 1.13.1:
youtube.com/watch?v=zFrsuR9kj9Y&t=2s

World download: mediafire.com/file/juj278b9v74nw8i/Proto_creative_-_Resource_low_30v_iron_farm.7z/file

Resource list:

4 stacks + 18 redstone dust
26 repeaters
23 comparators
2 observers
26 redstone torches

14 pistons
9 sand
14 hoppers
8 droppers

4 stacks of glass (6 stacks + 38 if you want to surround the spawning pads with glass)
Doors: 10 stacks + 41
Trapdoors: 30 (not needed when using pistons in 1.12)
20,5 stacks of blocks (23 if you surround the spawn pads with normal blocks)
11 stacks of slabs
4-5 stacks of torches to light up the farm
1 ladder
~4 stacks to fill up container blocks
1 button