REDSTONEPEDIA › Circuits › Memory and counters
Counter: counts pulses and reacts on a set count
toggles every 13th pulse · 23 blocks
Every 13th input pulse the output flips: on for 13 pulses, off for the next 13.
fits in 5×3×3
Every size 39
The best design for each size: pick one to see it.
| size | blocks | numbers |
|---|---|---|
| every 2nd | 3 blocks | |
| every 3rd | 11 blocks | |
| every 4th | 6 blocks | |
| every 5th | 19 blocks | |
| every 6th | 14 blocks | |
| every 7th | 25 blocks | |
| every 8th | 9 blocks | |
| every 9th | 23 blocks | |
| every 10th | 22 blocks | |
| every 11th | 23 blocks | |
| every 12th | 17 blocks | |
| every 13th (this page) | 23 blocks | |
| every 14th | 28 blocks | |
| every 15th | 23 blocks | |
| every 16th | 12 blocks | |
| every 17th | 23 blocks | |
| every 18th | 26 blocks | |
| every 19th | 23 blocks | |
| every 20th | 25 blocks | |
| every 21st | 23 blocks | |
| every 22nd | 23 blocks | |
| every 23rd | 23 blocks | |
| every 24th | 20 blocks | |
| every 25th | 23 blocks | |
| every 26th | 23 blocks | |
| every 27th | 23 blocks | |
| every 28th | 23 blocks | |
| every 30th | 23 blocks | |
| every 32nd | 15 blocks | |
| every 33rd | 23 blocks | |
| every 34th | 23 blocks | |
| every 36th | 29 blocks | |
| every 38th | 23 blocks | |
| every 39th | 23 blocks | |
| every 40th | 28 blocks | |
| every 45th | 23 blocks | |
| every 48th | 23 blocks | |
| every 100th | 23 blocks | |
| every 576th | 23 blocks |
Try it
Hold IN under the view for a long press, tap it for a short one: tap it 13 times and OUT goes through one on-off cycle (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. Its count is the number of items in its droppers: they pass the items one way per pulse, and the numbers over them show how many each holds. Load another number of items (stone here) to make it react on that count.
How this design does it: Counter 13, with items.
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.
Comes loaded with 13 stone in its containers: the download includes them; building it by hand, put them in first.
Blocks used: comparator copper bulb dropper redstone torch redstone wire stone
Details: how it works, measurements and properties
In depth
It counts input pulses: the output flips once every 13 input pulses: on for 13 pulses, then off for 13. In other words, it divides the number of pulses by 13.
Use it to do something every 13th time, or to slow a fast clock down 13 times.
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: press and hold the IN button of the bar (or the cell tagged IN) to power that input; a quick tap sends a short 2-tick pulse.
Inputs are tagged in lime; the output is tagged OUT: the redstone lamp in that cell (the view adds it to show the output) lights 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 1931 ticks (1 min 36.55 s).
Step by step (53 lines)
pulse 1: output 0 (level 0) pulse 2: output 0 (level 0) pulse 3: output 0 (level 0) pulse 4: output 0 (level 0) pulse 5: output 0 (level 0) pulse 6: output 0 (level 0) pulse 7: output 0 (level 0) pulse 8: output 0 (level 0) pulse 9: output 0 (level 0) pulse 10: output 0 (level 0) pulse 11: output 0 (level 0) pulse 12: output 0 (level 0) pulse 13: output 1 (level 15), changed pulse 14: output 1 (level 15) pulse 15: output 1 (level 15) pulse 16: output 1 (level 15) pulse 17: output 1 (level 15) pulse 18: output 1 (level 15) pulse 19: output 1 (level 15) pulse 20: output 1 (level 15) pulse 21: output 1 (level 15) pulse 22: output 1 (level 15) pulse 23: output 1 (level 15) pulse 24: output 1 (level 15) pulse 25: output 1 (level 15) pulse 26: output 0 (level 0), changed pulse 27: output 0 (level 0) pulse 28: output 0 (level 0) pulse 29: output 0 (level 0) pulse 30: output 0 (level 0) pulse 31: output 0 (level 0) pulse 32: output 0 (level 0) pulse 33: output 0 (level 0) pulse 34: output 0 (level 0) pulse 35: output 0 (level 0) pulse 36: output 0 (level 0) pulse 37: output 0 (level 0) pulse 38: output 0 (level 0) pulse 39: output 1 (level 15), changed pulse 40: output 1 (level 15) press 1 20: output 1 (level 15) press 2 30: output 1 (level 15) press 3 200: output 1 (level 15) press 4 20: output 1 (level 15) press 5 30: output 1 (level 15) press 6 20: output 1 (level 15) press 7 30: output 1 (level 15) press 8 20: output 1 (level 15) press 9 20: output 1 (level 15) press 10 30: output 1 (level 15) press 11 200: output 1 (level 15) press 12 20: output 0 (level 0), changed press 13 30: output 0 (level 0)
Measurements
| metric | value | what it means |
|---|---|---|
| N | 13 | how many input pulses one output cycle takes |
| output | toggles every 13 pulses | how the output shows the count: toggles (flips every N), pulses (one pulse every N) or level (its state repeats every N) |
| counts | one pulse per 26 inputs (toggles every 13: a square wave | |
| a | divider by 26) |
Notes from its designer
Counter 13, with items.
Properties
| Study | Memory and counters |
|---|---|
| Kind | Counter: counts pulses and reacts on a set count |
| Blocks placed | 23 (not counting the input levers or buttons and the lamp the view adds) |
| Box | 5×3×3 (45 blocks of space) |
| Made of (the blocks that change state) | comparator, copper bulb, dropper, redstone torch, redstone wire |
| Inputs / outputs | IN (repeater) / OUT |
| Design file | counter13-items-v45-23b |
The design file
Design file (37 lines)
# Counter: toggles every 13th pulse · 23 blocks
# https://vjeux.github.io/redstonepedia/circuits/memory/counter13-items-v45-23b.html
name: counter13-items-v45-23b
circuit: counter 13
port input: 1 2 0
port output: 0 0 1
nbt: 0 1 0 {Items:[{Slot:0b,id:"minecraft:stone",count:13}]}
origin: -2 0 -2
palette:
A minecraft:comparator[facing=south,mode=compare,powered=false]
B minecraft:dropper[facing=west,triggered=true]
C minecraft:comparator[facing=east,mode=compare,powered=true]
D minecraft:dropper[facing=east,triggered=false]
E minecraft:redstone_wall_torch[facing=west,lit=true]
F minecraft:redstone_wire[east=side,north=side,power=0,south=side,west=side]
R minecraft:redstone_torch[lit=true]
S minecraft:stone
W minecraft:waxed_copper_bulb[lit=false,powered=true]
c minecraft:comparator[facing=north,mode=compare,powered=false]
d minecraft:dropper[facing=up,triggered=true]
r minecraft:redstone_wall_torch[facing=north,lit=false]
layer -1:
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...S
layer 0:
DSW
..cB
.SSFS
layer 1:
FFES
r..A
SCDBR
layer 2:
.
.
...F