Hopper

Hopper

Type	Mechanical power
Stackable	Yes (64)
Damage	{{{damage}}}
Protection	{{{protection}}} x
Durability	{{{durability}}}
First Appearance	2.10
Filtering	{{{filters}}}
Buoyancy	{{{buoy}}}
Gravity	{{{gravity}}}
Flammable	{{{flammable}}}
Data Value	{{{data}}}

While it appears 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 ejecting 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).

Crafting

Name	Ingredients	Input » Output
Hopper	Wooden Siding, Corner, Gear and Wooden Pressure Plate

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	Misc. Effect
Ladder	Blocks	Items
Trapdoor	Max. Stack<64	Max. Stack=64	Coal, Torch, Redstone
Grate	large Items	small Items	feathers
Wicker	Not powdery	Powdery	Gunpowder, Flour	Will turn gravel into flint and sand
Rollers	Thick	Thin	String, Paper
Soul Sand	Everything			Will turn Ground Netherrack into Hellfire Dust

Note that the Hopper will not remove a brick placed inside of it. As such, bricks 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.

A hopper's inventory filled with bricks leaving two free slots.

Applications

• Collecting items
• Automated chest loading
• Automated drop sorting
• Automated refilling of any block that has an inventory
• Automated storage-mine cart loading
• Filtering Ground Netherrack into Hellfire Dust

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.
• Beware when filtering Ground Netherrack! Dropping more than 7 Ground Netherrack into the top of an unpowered Hopper without replacing the Soul Sand will cause the Hopper to break, losing half of the materials, the corner piece, and the pressure plate. It will also spawn you a cuddly new friend if on any difficulty other than peaceful. This has been changed as of 2.96 of Better Than Wolves.

Demonstration Video

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Auto Storage

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Full filtering list (WIP)

Name	Ladder	Hatch	Wicker	Grate	Rollers	Soulsand
Flour	Yes	Yes	No	Yes
Wheat	Yes	Yes	No	No	No
Hemp fibers	Yes	Yes	No	Yes
Feather	Yes	Yes	No	Yes
Meat	Yes	No	No	No
Mushrooms	Yes	Yes	No	Yes
Bones	Yes	Yes	No	No
Sugar cane	Yes	Yes	No	No
Leather	Yes	Yes	No	No
String	Yes	Yes	No	No
Foul food	Yes	Yes	No	No
Seeds	Yes	Yes	Yes	Yes
Gun powder	Yes	Yes	Yes	Yes
Chop	Yes	No	No	No
Fish	Yes	No	No	No
Donut	No	No	No	Yes
Egg	No	No	No	Yes
Rope	No	Yes	No	No
Torches	No	Yes	No	No
Sand	No	Yes	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
Slimeball	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
Minecarts	Yes	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.