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, Stewing Pot, 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 Sidings, Gears, Wooden Pressure Plate, Wooden 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	Misc. Effect
Ladder	Blocks	Items
Iron Bars	Unstackable items	Stackable 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
Slats	Thick	Thin	String, Paper
Soul Sand	Everything			Will turn Ground Netherrack into Hellfire Dust and Soul Dust into Saw Dust

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

<youtube v="4x1kj5UBMs8" /> <youtube v="RBnMLAKdm14" /> <youtube v="MU5V2fePHzc" />

Auto Storage

<youtube v="PLItdsTFl4M" />

Full filtering list

Item	Ladder	Iron Bars	Trapdoor	Grate	Slats	Wicker
Block	No	No	No	No	No	No
Flowers	Yes	Yes	Yes	Yes	No	No
Mushrooms	Yes	Yes	Yes	Yes	No	No
Natural Saplings	Yes	Yes	No	No	No	No
Torch	Yes	Yes	No	No	No	No
Redstone Torch	Yes	Yes	No	No	No	No
Tools	Yes	No	No	No	No	No
Apples	Yes	Yes	Yes	Yes	No	No
Arrows	Yes	Yes	Yes	No	No	No
Coal	Yes	Yes	Yes	Yes	No	No
Diamond	Yes	Yes	Yes	Yes	No	No
Ingots	Yes	Yes	No	No	No	No
Stick	Yes	Yes	Yes	No	No	No
Bowl	Yes	Yes	No	No	No	No
Mushroom Stew	Yes	No	No	No	No	No
String	Yes	Yes	Yes	Yes	Yes	No
Feather	Yes	Yes	Yes	Yes	No	No
Gunpowder	Yes	Yes	Yes	Yes	Yes	Yes
Seeds	Yes	Yes	Yes	Yes	Yes	Yes
Wheat	Yes	Yes	Yes	No	No	No
Bread	Yes	Yes	No	No	No	No
Armor	Yes	No	No	No	No	No
Flint	Yes	Yes	Yes	Yes	No	No
Meat & Fish	Yes	Yes	No	No	No	No
Painting	Yes	Yes	No	No	No	No
Buckets	Yes	No	No	No	No	No
Doors	Yes	No	No	No	No	No
Sign	Yes	No	No	No	No	No
Minecart	Yes	No	No	No	No	No
Saddle	Yes	No	No	No	No	No
Snowball	Yes	Yes	Yes	Yes	No	No
Boat	Yes	No	No	No	No	No
Leathers	Yes	Yes	Yes	No	Yes	No
Bricks	Yes	Yes	No	No	No	No
Clay Ball	Yes	Yes	Yes	Yes	No	No
Sugarcane	Yes	Yes	Yes	No	No	No
Paper	Yes	Yes	Yes	Yes	Yes	No
Book	Yes	Yes	No	No	No	No
Slimeball	Yes	Yes	Yes	Yes	No	No
Eggs	Yes	Yes	Yes	Yes	No	No
Compass	Yes	Yes	No	No	No	No
Clock	Yes	Yes	No	No	No	No
Glowstone Dust	Yes	Yes	Yes	Yes	Yes	Yes
Ink Sac	Yes	Yes	Yes	Yes	No	No
Dyes	Yes	Yes	Yes	Yes	Yes	Yes
Sugar	Yes	Yes	Yes	Yes	Yes	Yes
Bone	Yes	Yes	Yes	No	No	No
Cake	Yes	No	No	No	No	No
Bed	Yes	No	No	No	No	No
Map	Yes	No	No	No	Yes	No
Redstone Repeater	Yes	Yes	No	No	Yes	No
Cookies	Yes	Yes	Yes	Yes	No	No
Melon	Yes	Yes	No	No	No	No
Ender Pearl	Yes	Yes	Yes	Yes	No	No
Blaze Rod	Yes	Yes	Yes	No	No	No
Ghast Tear	Yes	Yes	Yes	Yes	No	No
Gold Nugget	Yes	Yes	Yes	Yes	No	No
Nether Wart	Yes	Yes	Yes	Yes	Yes	Yes
Bottles	Yes	Yes	No	No	No	No
Spider Eye	Yes	Yes	Yes	Yes	No	No
Fermented Spider Eye	Yes	Yes	Yes	Yes	No	No
Blaze Powder	Yes	Yes	Yes	Yes	Yes	Yes
Magma Cream	Yes	Yes	No	No	No	No
Brewing Stand	Yes	Yes	No	No	No	No
Cauldron	Yes	Yes	No	No	No	No
Eye of Ender	Yes	Yes	Yes	Yes	No	No
Glistering Melon	Yes	Yes	No	No	No	No
Fire Charge	Yes	Yes	No	No	No	No
Hemp	Yes	Yes	No	No	Yes	No
Gear	Yes	Yes	No	No	No	No
Flour	Yes	Yes	Yes	Yes	Yes	Yes
Hemp Fiber	Yes	Yes	Yes	Yes	Yes	No
Donut	Yes	Yes	Yes	Yes	No	No
Rope	Yes	Yes	Yes	No	No	No
Slats	Yes	Yes	No	No	No	No
Water Wheel	Yes	No	No	No	No	No
Sail	Yes	No	No	No	No	No
Wind Mill	Yes	No	No	No	No	No
Fabric	Yes	Yes	No	No	Yes	No
Grate	Yes	Yes	No	No	No	No
Wicker	Yes	Yes	No	No	No	No
Strap	Yes	Yes	Yes	No	Yes	No
Belt	Yes	Yes	Yes	No	No	No
Foul Food	Yes	Yes	No	No	No	No
Wood Blade	Yes	Yes	No	No	No	No
Glue	Yes	Yes	No	No	No	No
Tallow	Yes	Yes	No	No	No	No
Haft	Yes	Yes	Yes	No	No	No
Ground Netherrack	Yes	Yes	Yes	Yes	Yes	Yes
Hellfire Dust	Yes	Yes	Yes	Yes	Yes	Yes
Armor Plate	Yes	Yes	No	No	No	No
Carbon Powder	Yes	Yes	Yes	Yes	Yes	Yes
Padding	Yes	Yes	No	No	No	No
Filament	Yes	Yes	Yes	Yes	No	No
Redstone Eye	Yes	Yes	Yes	Yes	No	No
Urns	Yes	Yes	No	No	No	No
Potash	Yes	Yes	Yes	Yes	Yes	Yes
Soap	Yes	Yes	Yes	Yes	No	No
Saw Dust	Yes	Yes	Yes	Yes	Yes	Yes
Dynamite	Yes	Yes	No	No	No	No
Breeding Harness	Yes	Yes	No	No	No	No
Soul Dust	Yes	Yes	Yes	Yes	Yes	Yes
Nether Sludge	Yes	Yes	No	No	No	No
Music Discs	Yes	No	No	No	No	No
Tuning Fork	Yes	Yes	No	No	No	No
Arcane Scroll	Yes	Yes	Yes	Yes	Yes	No
Candle	Yes	Yes	No	No	No	No

Notes

• Gravel through the Wicker will separate into Sand and Flint, with flint not passing through the hopper and being left on top.