Redstonery
Redstonery › Circuits › 1-to-2 demultiplexer
Logic circuit

1-to-2 demultiplexer

Send one input toward a selected output.

13 × 17 footprint4 layers105 blocksTested in 4 rotationsJava Edition 26.2
Open in the simulatorBuild it in the game

Layout

Layer 0 (on the floor)
lever [face=floor, facing=north, powered=false] at x 0, z 0redstone dust at x 1, z 0redstone dust at x 2, z 0redstone dust at x 3, z 0redstone dust at x 4, z 0repeater [facing=west, delay=1] at x 5, z 0redstone dust at x 6, z 0redstone dust at x 7, z 0redstone dust at x 8, z 0redstone dust at x 9, z 0redstone dust at x 10, z 0repeater [facing=west, delay=1] at x 11, z 0redstone dust at x 12, z 0repeater [facing=north, delay=1] at x 2, z 1redstone dust at x 2, z 2redstone dust at x 2, z 3redstone dust at x 2, z 4redstone dust at x 2, z 5redstone dust at x 2, z 6redstone dust at x 2, z 7stone at x 2, z 8redstone torch (on a wall) [facing=south] at x 2, z 9stone at x 4, z 4redstone dust at x 4, z 5redstone dust at x 4, z 6redstone dust at x 4, z 7redstone dust at x 4, z 8repeater [facing=north, delay=1] at x 4, z 9redstone dust at x 2, z 10redstone dust at x 3, z 10redstone dust at x 4, z 10redstone dust at x 3, z 11stone at x 3, z 12redstone torch (on a wall) [facing=south] at x 3, z 13repeater [facing=north, delay=1] at x 3, z 14redstone dust at x 3, z 15redstone dust at x 3, z 16redstone dust at x 4, z 16redstone lamp at x 5, z 16repeater [facing=north, delay=1] at x 8, z 1redstone dust at x 8, z 2redstone dust at x 8, z 3redstone dust at x 8, z 4redstone dust at x 8, z 5redstone dust at x 8, z 6redstone dust at x 8, z 7stone at x 8, z 8redstone torch (on a wall) [facing=south] at x 8, z 9stone at x 10, z 4redstone dust at x 10, z 5redstone dust at x 10, z 6redstone dust at x 10, z 7stone at x 10, z 8redstone torch (on a wall) [facing=south] at x 10, z 9redstone dust at x 8, z 10redstone dust at x 9, z 10redstone dust at x 10, z 10redstone dust at x 9, z 11stone at x 9, z 12redstone torch (on a wall) [facing=south] at x 9, z 13repeater [facing=north, delay=1] at x 9, z 14redstone dust at x 9, z 15redstone dust at x 9, z 16redstone dust at x 10, z 16redstone lamp at x 11, z 16
Layer 1 (1 up)
stone at x 4, z 3redstone dust at x 4, z 4stone at x 10, z 3redstone dust at x 10, z 4
Layer 2 (2 up)
stone at x 0, z 0stone at x 1, z 0stone at x 2, z 0stone at x 3, z 0stone at x 4, z 0stone at x 5, z 0stone at x 6, z 0stone at x 7, z 0stone at x 8, z 0stone at x 9, z 0stone at x 10, z 0stone at x 11, z 0stone at x 12, z 0stone at x 4, z 1stone at x 4, z 2redstone dust at x 4, z 3stone at x 10, z 1stone at x 10, z 2redstone dust at x 10, z 3
Layer 3 (3 up)
lever [face=floor, facing=north, powered=false] at x 0, z 0redstone dust at x 1, z 0redstone dust at x 2, z 0redstone dust at x 3, z 0redstone dust at x 4, z 0repeater [facing=west, delay=1] at x 5, z 0redstone dust at x 6, z 0redstone dust at x 7, z 0redstone dust at x 8, z 0redstone dust at x 9, z 0redstone dust at x 10, z 0repeater [facing=west, delay=1] at x 11, z 0redstone dust at x 12, z 0repeater [facing=north, delay=1] at x 4, z 1redstone dust at x 4, z 2repeater [facing=north, delay=1] at x 10, z 1redstone dust at x 10, z 2
redstone dustredstone torchrepeater or comparatorinputlampsolid blockarrows point where a device sends its output; north is up

How it works

Route one data signal to one of two separate outputs. The raised rails carry independent inputs into visible torch AND terms; repeaters isolate the output OR rails. Allow 60 game ticks for this teaching layout to settle.

  1. The data input is combined with opposite select conditions.
  2. With data active, one selected output is active; with data off, both output routes are off.

Truth table

Settled outputs after the inputs stop changing. 1 is on, 0 is off. Every row is checked in the simulator in all four rotations.

DataSelectdata when Select offdata when Select on
0000
1010
0100
1101

Inputs and outputs

  • InputData (x 0, y 0, z 0)
  • InputSelect (x 0, y 3, z 0)
  • Outputdata when Select off (x 4, y 0, z 16)
  • Outputdata when Select on (x 10, y 0, z 16)

Blocks you need

59 × redstone dust, 26 × stone, 11 × repeater, 5 × redstone torch (on a wall), 2 × lever, 2 × redstone lamp.

Build it in the game: 105 commands

Relative to where you stand, with x running east and z running south. Paste one line at a time into chat, or into a chain of command blocks. The block art is the game's own; the layout is what the page above shows.

setblock ~0 ~0 ~0 minecraft:lever[face=floor,facing=north,powered=false]
setblock ~1 ~0 ~0 minecraft:redstone_wire
setblock ~2 ~0 ~0 minecraft:redstone_wire
setblock ~3 ~0 ~0 minecraft:redstone_wire
setblock ~4 ~0 ~0 minecraft:redstone_wire
setblock ~5 ~0 ~0 minecraft:repeater[facing=west,delay=1]
setblock ~6 ~0 ~0 minecraft:redstone_wire
setblock ~7 ~0 ~0 minecraft:redstone_wire
setblock ~8 ~0 ~0 minecraft:redstone_wire
setblock ~9 ~0 ~0 minecraft:redstone_wire
setblock ~10 ~0 ~0 minecraft:redstone_wire
setblock ~11 ~0 ~0 minecraft:repeater[facing=west,delay=1]
setblock ~12 ~0 ~0 minecraft:redstone_wire
setblock ~0 ~2 ~0 minecraft:stone
setblock ~0 ~3 ~0 minecraft:lever[face=floor,facing=north,powered=false]
setblock ~1 ~2 ~0 minecraft:stone
setblock ~1 ~3 ~0 minecraft:redstone_wire
setblock ~2 ~2 ~0 minecraft:stone
setblock ~2 ~3 ~0 minecraft:redstone_wire
setblock ~3 ~2 ~0 minecraft:stone
setblock ~3 ~3 ~0 minecraft:redstone_wire
setblock ~4 ~2 ~0 minecraft:stone
setblock ~4 ~3 ~0 minecraft:redstone_wire
setblock ~5 ~2 ~0 minecraft:stone
setblock ~5 ~3 ~0 minecraft:repeater[facing=west,delay=1]
setblock ~6 ~2 ~0 minecraft:stone
setblock ~6 ~3 ~0 minecraft:redstone_wire
setblock ~7 ~2 ~0 minecraft:stone
setblock ~7 ~3 ~0 minecraft:redstone_wire
setblock ~8 ~2 ~0 minecraft:stone
setblock ~8 ~3 ~0 minecraft:redstone_wire
setblock ~9 ~2 ~0 minecraft:stone
setblock ~9 ~3 ~0 minecraft:redstone_wire
setblock ~10 ~2 ~0 minecraft:stone
setblock ~10 ~3 ~0 minecraft:redstone_wire
setblock ~11 ~2 ~0 minecraft:stone
setblock ~11 ~3 ~0 minecraft:repeater[facing=west,delay=1]
setblock ~12 ~2 ~0 minecraft:stone
setblock ~12 ~3 ~0 minecraft:redstone_wire
setblock ~2 ~0 ~1 minecraft:repeater[facing=north,delay=1]
setblock ~2 ~0 ~2 minecraft:redstone_wire
setblock ~2 ~0 ~3 minecraft:redstone_wire
setblock ~2 ~0 ~4 minecraft:redstone_wire
setblock ~2 ~0 ~5 minecraft:redstone_wire
setblock ~2 ~0 ~6 minecraft:redstone_wire
setblock ~2 ~0 ~7 minecraft:redstone_wire
setblock ~2 ~0 ~8 minecraft:stone
setblock ~2 ~0 ~9 minecraft:redstone_wall_torch[facing=south]
setblock ~4 ~2 ~1 minecraft:stone
setblock ~4 ~3 ~1 minecraft:repeater[facing=north,delay=1]
setblock ~4 ~2 ~2 minecraft:stone
setblock ~4 ~3 ~2 minecraft:redstone_wire
setblock ~4 ~1 ~3 minecraft:stone
setblock ~4 ~2 ~3 minecraft:redstone_wire
setblock ~4 ~0 ~4 minecraft:stone
setblock ~4 ~1 ~4 minecraft:redstone_wire
setblock ~4 ~0 ~5 minecraft:redstone_wire
setblock ~4 ~0 ~6 minecraft:redstone_wire
setblock ~4 ~0 ~7 minecraft:redstone_wire
setblock ~4 ~0 ~8 minecraft:redstone_wire
setblock ~4 ~0 ~9 minecraft:repeater[facing=north,delay=1]
setblock ~2 ~0 ~10 minecraft:redstone_wire
setblock ~3 ~0 ~10 minecraft:redstone_wire
setblock ~4 ~0 ~10 minecraft:redstone_wire
setblock ~3 ~0 ~11 minecraft:redstone_wire
setblock ~3 ~0 ~12 minecraft:stone
setblock ~3 ~0 ~13 minecraft:redstone_wall_torch[facing=south]
setblock ~3 ~0 ~14 minecraft:repeater[facing=north,delay=1]
setblock ~3 ~0 ~15 minecraft:redstone_wire
setblock ~3 ~0 ~16 minecraft:redstone_wire
setblock ~4 ~0 ~16 minecraft:redstone_wire
setblock ~5 ~0 ~16 minecraft:redstone_lamp
setblock ~8 ~0 ~1 minecraft:repeater[facing=north,delay=1]
setblock ~8 ~0 ~2 minecraft:redstone_wire
setblock ~8 ~0 ~3 minecraft:redstone_wire
setblock ~8 ~0 ~4 minecraft:redstone_wire
setblock ~8 ~0 ~5 minecraft:redstone_wire
setblock ~8 ~0 ~6 minecraft:redstone_wire
setblock ~8 ~0 ~7 minecraft:redstone_wire
setblock ~8 ~0 ~8 minecraft:stone
setblock ~8 ~0 ~9 minecraft:redstone_wall_torch[facing=south]
setblock ~10 ~2 ~1 minecraft:stone
setblock ~10 ~3 ~1 minecraft:repeater[facing=north,delay=1]
setblock ~10 ~2 ~2 minecraft:stone
setblock ~10 ~3 ~2 minecraft:redstone_wire
setblock ~10 ~1 ~3 minecraft:stone
setblock ~10 ~2 ~3 minecraft:redstone_wire
setblock ~10 ~0 ~4 minecraft:stone
setblock ~10 ~1 ~4 minecraft:redstone_wire
setblock ~10 ~0 ~5 minecraft:redstone_wire
setblock ~10 ~0 ~6 minecraft:redstone_wire
setblock ~10 ~0 ~7 minecraft:redstone_wire
setblock ~10 ~0 ~8 minecraft:stone
setblock ~10 ~0 ~9 minecraft:redstone_wall_torch[facing=south]
setblock ~8 ~0 ~10 minecraft:redstone_wire
setblock ~9 ~0 ~10 minecraft:redstone_wire
setblock ~10 ~0 ~10 minecraft:redstone_wire
setblock ~9 ~0 ~11 minecraft:redstone_wire
setblock ~9 ~0 ~12 minecraft:stone
setblock ~9 ~0 ~13 minecraft:redstone_wall_torch[facing=south]
setblock ~9 ~0 ~14 minecraft:repeater[facing=north,delay=1]
setblock ~9 ~0 ~15 minecraft:redstone_wire
setblock ~9 ~0 ~16 minecraft:redstone_wire
setblock ~10 ~0 ~16 minecraft:redstone_wire
setblock ~11 ~0 ~16 minecraft:redstone_lamp