REDSTONEPEDIA › Circuits › Logic gates
Logic gate
NOT · 1 block
The output is on when the input is off, and off when the input is on.
reacts in 2 ticks (0.1 s) · made of redstone torch · fits in 1×1×1
Try it
Tap IN under the view to turn the input on, again to turn it off: the box marked OUT turns red while the output is on. Press play under the view to watch a demo on a loop; touch any other control to take over.
How this design does it: NOT gate, 1 block: a wall torch hanging on the input block itself.
Build it
Download .litematic Download the design as text
The .litematic opens in Litematica (Minecraft 26.3): every block of the design in one region. The text file is the same build written as plain text, block by block.
Blocks used: redstone torch
Details: how it works, measurements and properties
In depth
A logic gate: the output depends only on the input right now. NOT: the output is the opposite of the input: on while the input is off, off while it is on.
| IN | OUT |
|---|---|
| off | on |
| on | off |
The output settles 2 ticks (0.1 s) after an input changes.
How to try it
Press play under the view to watch the demo on a loop (the badge reads demo with the step it is on; the same sequence is drawn as a timing diagram below). Touch any control to stop it and try the circuit yourself.
To try it: tap the IN button of the bar (or the cell tagged IN) to turn that input on or off (it powers the cell with a redstone block).
Inputs are tagged in lime; the output is tagged OUT: the orange glass marker next to it glows while the output is on (the output strip by the demo badge shows its last 40 game ticks, 2 seconds). Drag to look around, pinch or scroll to zoom, step one game tick at a time with the step button.
Inputs and output over time
The input follows this schedule (the 3D view's demo plays the same). Lime: an input is on; orange: the output is on (taller = a stronger signal, 1 to 15). Time runs left to right in game ticks (20 ticks = 1 s).
Swipe the diagram sideways: the whole sequence lasts 81 ticks (4.05 s).
Step by step (3 lines)
0 (rest): output 1 -> 1: output 0 after 2 ticks (0.1 s) -> 0: output 1 after 2 ticks (0.1 s)
Measurements
| metric | value | what it means |
|---|---|---|
| function | not | the logic function the truth table names |
| latency | 2 ticks (0.1 s) | the worst time from an input change to the output's change |
| tileable | every 1 (0 0 1) |
Notes from its designer
NOT gate, 1 block: a wall torch hanging on the input block itself. The input powers that block, the torch goes out, and the torch is the output: lit exactly when the input is off. A row of them side by side inverts a whole bus.
Properties
| Study | Logic gates |
|---|---|
| Kind | Logic gate |
| Blocks placed | 1 (not counting the input levers or buttons the view adds) |
| Box | 1×1×1 (1 blocks of space) |
| Made of (the blocks that change state) | redstone torch |
| Inputs / outputs | IN (repeater) / OUT |
| Design file | gate-not |
The design file
Design file (12 lines)
# Logic gate: NOT · 1 block # https://vjeux.github.io/redstonepedia/circuits/gates/gate-not.html name: gate-not circuit: gate not tile: 0 0 1 port input: 0 1 0 port output: 1 1 0 origin: 1 0 0 palette: T minecraft:redstone_wall_torch[facing=east,lit=true] layer 1: T