AUTOMATIC SMELTER ARRAY
An array of furnaces fed by hoppers that automatically distributes items to smelt and collects the output. Scales from 1 to 16+ furnaces. Uses no redstone, purely hopper mechanics.
Materials List
The material cost of one Automatic Smelter Array
Adding up the recipes behind those parts, one Automatic Smelter Array costs 240 crafting ingredients in total: 120 Iron Ingot, 64 Stone Crafting Materials and 32 Planks, plus 1 more kind.
Hopper each have their own page here, with the signal behaviour and block values that decide how the Automatic Smelter Array times out.
| Part used in Automatic Smelter Array | How many per Automatic Smelter Array | Crafting cost of a single one |
|---|---|---|
 Furnace | 8 | 8 Stone Crafting Materials |
 Hopper | 24 | 5 Iron Ingot, 1 Chest |
 Chest | 4 | 8 Planks |
The full shopping list for Automatic Smelter Array
120 Iron Ingot
64 Stone Crafting Materials
32 Planks- 24 Chest
Prices for Automatic Smelter Array are read straight off the recipes in Java Edition 26.2.
Start here: what an Automatic Smelter Array is and what it does
An array of furnaces fed by hoppers that automatically distributes items to smelt and collects the output. Scales from 1 to 16+ furnaces. Uses no redstone, purely hopper mechanics.
As a utility build it automates a processing job, smelting, brewing, composting, or generating a resource, to save repetitive manual work. It is a beginner-friendly build: the wiring is forgiving and a first-time redstoner can finish it in one sitting.
It fits in roughly 2W x 8L x 4H (for 8 furnaces) and works in Minecraft 1.5+ through to the current 26.2 release.
What makes the Automatic Smelter Array run, part by part
This build is pure hopper logistics with no redstone: a hopper on top of each furnace feeds raw material, a side hopper feeds fuel, and a bottom hopper drains the smelted result to a chest. An input chest distributes items along the chain so every furnace fills in turn.
The core parts doing the work are furnace, hopper, chest, and building Blocks; the rest of the 4 material types are structure and wiring that hold those pieces in the right relationship.
Because it automates a processing step, the limiting factor is the machine's own cycle time, and the redstone simply has to feed it in the correct order and rhythm.
How to build the Automatic Smelter Array
- 1Place a row of furnaces side by side.
- 2On top of each furnace, place a hopper pointing into the furnace (item input).
- 3On the side of each furnace (fuel slot side), place a hopper pointing into the furnace.
- 4Below each furnace, place a hopper pointing toward a collection chest.
- 5Place an input chest on top of the first input hopper, items distribute along the chain.
- 6Place a fuel chest feeding into the first fuel hopper.
- 7Items from the input chest flow through hoppers, filling each furnace in turn.
- 8Smelted items drop into bottom hoppers and flow to the output chest.
Uses & applications
- ▸As a utility build it automates a processing job, smelting, brewing, composting, or generating a resource, to save repetitive manual work.
- ▸Built from 8× furnace, 24× hopper, 4× chest, and 16× building Blocks and more, it slots into a survival base as a beginner-level project.
- ▸Connect its input and output chests to a wider item network so it processes resources unattended.
- ▸Scale the array up by repeating the unit once the single version works.
Tips & common mistakes
- !Fuel and material must enter through the correct faces, top hopper for the item, side hopper for the fuel, or the furnace simply will not smelt.
- !A beginner build is cheap enough to redo, so run the Automatic Smelter Array through one full cycle in creative before you spend the materials on it in survival.
- !Remember a powered hopper is locked, not active, keep stray redstone away from the hopper lines unless you deliberately want to gate item flow.
Automatic Smelter Array FAQ
How do you build an Automatic Smelter Array in Minecraft?
Place a row of furnaces side by side. On top of each furnace, place a hopper pointing into the furnace (item input). The full build takes 4 material types and fits in about 2W x 8L x 4H (for 8 furnaces).
What materials does an Automatic Smelter Array need?
The main materials are 8× furnace, 24× hopper, 4× chest, and 16× building Blocks.
How hard is the Automatic Smelter Array to build?
It is a beginner-friendly build: the wiring is forgiving and a first-time redstoner can finish it in one sitting. It is compatible with Minecraft 1.5+ and later.
How does the Automatic Smelter Array actually work?
This build is pure hopper logistics with no redstone: a hopper on top of each furnace feeds raw material, a side hopper feeds fuel, and a bottom hopper drains the smelted result to a chest. An input chest distributes items along the chain so every furnace fills in turn.
Builds that share parts with Automatic Smelter Array
These 5 contraption pages share something concrete with Automatic Smelter Array, not just a topic:
