Difference between revisions of "Hopper"
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Revision as of 14:47, 22 August 2011
While it appear deceptively simple (it's basically a box with a hole in it), the Hopper allows the construction of many advanced mechanisms. Any items that fall into the top of the Hopper are added to its inventory. If the Hopper receives Mechanical Power through axles mounted to its sides, it will begin to eject items from its inventory (and stop when the power is cut) out the spout below. Items may be ejected into the air, or directly into any other Block that has an inventory (chest, dispenser, cauldron, etc.), and it is also capable of eject its contents into a storage minecart parked beneath it. Also, if all the slots in its inventory contain items, it will send out a redstone signal warning that it is getting full (the signal will stop when there is an empty slot in the inventory).
Contents
Crafting
Wood Panel | Wood Panel | ||
Gear | Wooden Pressure Plate | Gear | |
Wood Corner |
Filtering
The Hopper also contains an extra inventory slot in which you may place various items that act as a "filter" on which items it will swallow. Filtering hoppers can be placed in a trench so water will wash Items/Drops over every hopper. The water must decend one block after each hopper to avoid jamming.(Changed in 2.61 the trench can be on one level now)
Filter | stops | passes | passing Examples |
---|---|---|---|
Ladder | blocks | Items | |
Trapdoor | max. Stack<64 | max. Stack=64 | coal, torch, redstonedust |
Grate | large Items | small Items | feathers |
Wicker | not powdery | powdery | gunpowder, flour |
Roller | Thick | Thin | string, paper |
Note that the Hopper will not eject clay balls if they are placed inside of it (it gets stuck to the sides). As such, clay balls can be used as a "filler" within the Hopper inventory, allowing you to control precisely how much space is available to store other items within it.
You can also use the Wicker to separate gravel into flint and sand when used as a filter on the Hopper.
<youtube v="MU5V2fePHzc" />
Applications
- Automated Chest loading
- Automated Drop sorting
- Automated Refilling of any Block that has an inventory
- Automated storage-mine cart loading
Keep in Mind
- The Redstone signal the hopper emits if no empty slot is available will reach the block beneath it. So a booster rail will be powered if the hopper is becoming full. To stop the minecart from escaping and causing the hopper to spill its content into the air place a block dispenser so it can place a solid block next to the booster rail. With this design you can trigger the minecart when the hopper has been cut from mechanical power.
- You may place multiple hoppers into one trench without incline. But to keep the Items/Blocks separated put another block between each hopper.
- Hoppers can catch fire and thus be destroyed.
Demonstration Video
<youtube v="4x1kj5UBMs8" /> <youtube v="RBnMLAKdm14" />
Auto Storage
<youtube v="PLItdsTFl4M" />
Full filtering list (WIP)
Name | Ladder | Hatch | Wicker | Grate | Roller | Soulsand |
---|---|---|---|---|---|---|
Flour/Hemp fibers/ Feather/Mushrooms |
Yes |
Yes |
No |
Yes |
| |
Bones/Sugar cane/ Leather/String/Foul food |
Yes |
Yes |
No |
No |
| |
Seeds/Gun powder/Redstone |
Yes |
Yes |
Yes |
Yes |
| |
Chop/Fish |
Yes |
No |
No |
No |
| |
Donut/Egg |
No |
No |
No |
Yes |
| |
Rope/Torches |
No |
Yes |
No |
No |
| |
Sand |
? |
? |
Yes |
? |
| |
Gravel |
Yes |
Yes |
Yes (1) |
Yes |
Yes | |
Flint |
Yes |
Yes |
No |
Yes |
No | |
Clay Ball |
Yes |
Yes |
No |
Yes |
No | |
Redstone Torch |
Yes |
Yes |
No |
No |
No | |
Gear |
Yes |
Yes |
No |
No |
No | |
Dung |
Yes |
Yes |
No |
No |
No | |
Redstone Dust |
Yes |
Yes |
Yes |
Yes |
Yes | |
Diamond |
Yes |
Yes |
No |
Yes |
No | |
Glass Block |
No |
No |
No |
No |
No | |
Wooden Plank |
No |
No |
No |
No |
No | |
Panel |
No |
No |
No |
No |
No | |
Moulding |
No |
No |
No |
No |
No | |
Redstone Repeater |
Yes |
Yes |
No |
No |
No | |
Iron Ingot |
Yes |
Yes |
No |
No |
No | |
Stick |
Yes |
Yes |
No |
No |
No | |
Hatch |
No |
No |
No |
No |
No | |
Sword |
Yes |
No |
No |
No |
No | |
Bow |
Yes |
No |
No |
No |
No | |
Arrow |
Yes |
Yes |
No |
No |
No | |
Pickaxe |
Yes |
No |
No |
No |
No | |
Coal |
Yes |
Yes |
No |
Yes |
No | |
Bucket (Water) |
Yes |
No |
No |
No |
No | |
Watch |
Yes |
Yes |
No |
No |
No | |
Ladder |
No |
No |
No |
No |
No | |
Stair (Cobblestone) |
No |
No |
No |
No |
No | |
Dirt |
No |
No |
No |
No |
No | |
Stone |
No |
No |
No |
No |
No | |
Cobblestone |
No |
No |
No |
No |
No | |
Bone |
Yes |
Yes |
No |
No |
No | |
Platform |
No |
No |
No |
No |
No | |
Slab (Wood) |
No |
No |
No |
No |
No | |
Slime Ball |
Yes |
Yes |
No |
Yes |
No | |
Feather |
Yes |
Yes |
No |
Yes |
No | |
Bonemeal |
Yes |
Yes |
Yes |
Yes |
Yes | |
Hemp Fibre |
Yes |
Yes |
No |
Yes |
Yes | |
Fabric |
Yes |
Yes |
No |
No |
No | |
Gold Ingot |
Yes |
Yes |
No |
No |
No | |
Rope |
Yes |
Yes |
No |
No |
No | |
Light Block |
No |
No |
No |
No |
No | |
Sugar Cane |
Yes |
Yes |
No |
No |
No | |
Wicker |
Yes |
Yes |
No |
No |
No |
Notes
(1) Gravel through the Wicker will separate into Sand and Flint, with flint not passing through the hopper and being left on top.