toggles every 100th pulse · 23 blocks

Every 100th input pulse the output flips: on for 100 pulses, off for the next 100.

fits in 5×3×3

toggles every 100th pulseCounter3D view loading (or not available in this browser)

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	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 (this page)	23 blocks
every 576th	23 blocks

Try it

Hold IN under the view for a long press, tap it for a short one: the demo counts the 100 pulses for you: pick 100× in the speed dropdown and watch OUT change (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 100, 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 100 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 100 input pulses: on for 100 pulses, then off for 100. In other words, it divides the number of pulses by 100.

Use it to do something every 100th time, or to slow a fast clock down 100 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 13975 ticks (11 min 38.75 s).

Step by step (401 lines)

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pulse 300: output 1 (level 15), changed
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press 1 20: output 1 (level 15)
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press 99 200: output 0 (level 0), changed
press 100 20: output 0 (level 0)

Measurements

metric	value	what it means
N	100	how many input pulses one output cycle takes
output	toggles every 100 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 200 inputs (toggles every 100: a square wave
a	divider by 200)

Notes from its designer

Counter 100, 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	`counter100-items-v45-23b`

The design file

on GitHub

Design file (37 lines)

# Counter: toggles every 100th pulse · 23 blocks
# https://vjeux.github.io/redstonepedia/circuits/memory/counter100-items-v45-23b.html
name: counter100-items-v45-23b
circuit: counter 100
port input: 1 2 0
port output: 0 0 1
nbt: 0 1 0 {Items:[{Slot:0b,id:"minecraft:stone",count:64},{Slot:1b,id:"minecraft:stone",count:36}]}
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:
  .
  ..d
  ...S
layer 0:
  DSW
  ..cB
  .SSFS
layer 1:
  FFES
  r..A
  SCDBR
layer 2:
  .
  .
  ...F