Redstonery › Circuits › NAND gate
Logic circuit
NAND gate
Make the both-active state the only off state.
4 × 3 footprint2 layers12 blocksTested in 4 rotationsJava Edition 26.2
Layout
redstone dustredstone torchinputlampsolid blockarrows point where a device sends its output; north is up
How it works
The AND without its third torch: the dust between the two torches is the answer, read by a lamp beside the middle block. Lit unless both inputs are on.
- The circuit produces the inverse of the two-input AND condition.
- One missing input is enough to keep the output on.
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.
| A | B | the lamp, not (A and B) |
|---|---|---|
| 0 | 0 | 1 |
| 1 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 1 | 0 |
Inputs and outputs
- InputA (x 0, y 0, z 0)
- InputB (x 0, y 0, z 2)
- Outputthe lamp, not (A and B) (x 3, y 0, z 1)
Blocks you need
4 × redstone dust, 3 × stone, 2 × lever, 2 × redstone torch, 1 × redstone lamp.
Build it in the game: 12 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:stone setblock ~2 ~1 ~0 minecraft:redstone_torch setblock ~0 ~0 ~2 minecraft:lever[face=floor,facing=north,powered=false] setblock ~1 ~0 ~2 minecraft:redstone_wire setblock ~2 ~0 ~2 minecraft:stone setblock ~2 ~1 ~2 minecraft:redstone_torch setblock ~2 ~0 ~1 minecraft:stone setblock ~2 ~1 ~1 minecraft:redstone_wire setblock ~3 ~0 ~1 minecraft:redstone_lamp setblock ~3 ~1 ~1 minecraft:redstone_wire