at least 256 ticks (12.8 s) · 13 blocks

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 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 14333 ticks (11 min 56.65 s).

in  2 ticks (0.1 s): +6 for 256
in  3 ticks (0.15 s): +4 for 256  <- not handled
in  4 ticks (0.2 s): +6 for 256
in  5 ticks (0.25 s): +6 for 256
in  6 ticks (0.3 s): +6 for 256
in  8 ticks (0.4 s): +6 for 256
in 10 ticks (0.5 s): +6 for 256
in 15 ticks (0.75 s): +6 for 256
in 20 ticks (1 s): +6 for 256
in 30 ticks (1.5 s): +6 for 256
in 40 ticks (2 s): +6 for 256
in 60 ticks (3 s): +6 for 256
in 80 ticks (4 s): +6 for 256
in 120 ticks (6 s): +6 for 256
in 160 ticks (8 s): +6 for 256
in 240 ticks (12 s): +6 for 256
in 320 ticks (16 s): +6 for 256
in 480 ticks (24 s): +6 for 256
in 640 ticks (32 s): +6 for 256
in 960 ticks (48 s): +6 for 256

Measurements

Notes from its designer

Stretches any input of 4 ticks or more into one pulse of exactly 8 ticks per item in the first hopper (8 ticks to 24 seconds), always 13 blocks: a copper bulb remembers the input (a piston pushes an observer beside it, which fires once each time the input turns on); while the bulb is lit, its comparator locks the second hopper and unlocks the first, so the items pass one by one; when the first hopper is empty, its comparator goes off and a torch toggles the bulb off; then the items flow back. This one holds 32 items: 256 ticks. Detail: the bulb's comparator powers the stone above the second hopper (locking it) and turns off the torch on that stone, which locked the first hopper; the first hopper's comparator powers the block whose torch lights the bulb from below when that hopper empties.

Properties

The design file

on GitHub

# Signal stretcher: at least 256 ticks (12.8 s) · 13 blocks
# https://vjeux.github.io/redstonepedia/circuits/pulse/pulse-extender-hopper-oneshot-L256.html
name: pulse-extender-hopper-oneshot-L256
circuit: pulse-extender
origin: 0 0 0
port input: 5 2 2
port output: 1 2 1
palette:
  G minecraft:stone
  S minecraft:hopper[enabled=false,facing=east]
  U minecraft:hopper[enabled=true,facing=west]
  C minecraft:comparator[facing=north,mode=compare,powered=true]
  F minecraft:stone
  Y minecraft:stone
  T minecraft:redstone_wall_torch[facing=east,lit=false]
  W minecraft:redstone_wall_torch[facing=west,lit=true]
  X minecraft:stone
  K minecraft:comparator[facing=south,mode=compare,powered=false]
  B minecraft:waxed_copper_bulb[lit=false,powered=false]
  O minecraft:observer[facing=east,powered=false]
  P minecraft:sticky_piston[extended=false,facing=west]
layer 0:
  ......
  G.....
  ......
layer 1:
  SU....
  CF....
  YT....
layer 2:
  WX....
  .K....
  .B.OP.
nbt: 0 1 0 {Items:[{Slot:0b,id:"minecraft:cobblestone",count:32}]}