26-tick pulse · 20 blocks

When the input turns on, the output gives one short pulse of 26 ticks (1.3 s); turning the input off does nothing.

starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s) · fits in 5×2×5

26-tick pulseOne pulse when switched on3D view loading (or not available in this browser)

Every size 22

The best design for each size: pick one to see it.

size	blocks	numbers
2 ticks (0.1 s)	2 blocks	starts after 4 ticks (0.2 s) · needs an input of at least 6 ticks (0.3 s)
4 ticks (0.2 s)	4 blocks	starts after 8 ticks (0.4 s) · needs an input of at least 4 ticks (0.2 s)
6 ticks (0.3 s)	4 blocks	starts after 10 ticks (0.5 s) · needs an input of at least 4 ticks (0.2 s)
8 ticks (0.4 s)	4 blocks	starts after 12 ticks (0.6 s) · needs an input of at least 4 ticks (0.2 s)
10 ticks (0.5 s)	5 blocks	starts after 1 tick (0.05 s) · needs an input of at least 2 ticks (0.1 s)
12 ticks (0.6 s)	17 blocks	starts after 8 ticks (0.4 s) · needs an input of at least 4 ticks (0.2 s)
14 ticks (0.7 s)	17 blocks	starts after 10 ticks (0.5 s) · needs an input of at least 4 ticks (0.2 s)
16 ticks (0.8 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
18 ticks (0.9 s)	17 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
20 ticks (1 s)	20 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
22 ticks (1.1 s)	20 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
24 ticks (1.2 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
26 ticks (1.3 s) (this page)	20 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
28 ticks (1.4 s)	20 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
30 ticks (1.5 s)	20 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
32 ticks (1.6 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
36 ticks (1.8 s)	24 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
38 ticks (1.9 s)	24 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
40 ticks (2 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
64 ticks (3.2 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
128 ticks (6.4 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)
256 ticks (12.8 s)	13 blocks	starts after 6 ticks (0.3 s) · needs an input of at least 4 ticks (0.2 s)

Try it

Hold IN under the view for a long press, tap it for a short one: 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: One fixed-length pulse every time the input turns on, however long it stays on.

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: comparator copper bulb observer redstone wire repeater sticky piston stone

Details: how it works, measurements and properties

In depth

When the input turns on, the output gives one short pulse of L = 26 ticks (1.3 s), starting 6 ticks (0.3 s) after the input turned on. When the input turns off, nothing happens. It handles every input pulse of 4 ticks (0.2 s) or longer.

Use it to turn a lever (which stays on) into a single short pulse, e.g. to fire a piston once.

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 1435 ticks (1 min 11.75 s).

Step by step (14 lines)

in  2 ticks (0.1 s): +6 for 26
in  3 ticks (0.15 s): no output  <- not handled
in  4 ticks (0.2 s): +6 for 26
in  5 ticks (0.25 s): +6 for 26
in  6 ticks (0.3 s): +6 for 26
in  8 ticks (0.4 s): +6 for 26
in 10 ticks (0.5 s): +6 for 26
in 15 ticks (0.75 s): +6 for 26
in 20 ticks (1 s): +6 for 26
in 30 ticks (1.5 s): +6 for 26
in 40 ticks (2 s): +6 for 26
in 60 ticks (3 s): +6 for 26
in 80 ticks (4 s): +6 for 26
in 120 ticks (6 s): +6 for 26

Measurements

metric	value	what it means
L	26 ticks (1.3 s)	the length of the output pulse
delay	6 ticks (0.3 s)	the time from the input's edge to the start of the output pulse
min-pulse	4 ticks (0.2 s)	the shortest input pulse handled correctly (every longer one works too)

Notes from its designer

One fixed-length pulse every time the input turns on, however long it stays on.

Properties

Study	Pulse shapers
Kind	One pulse when switched on (rising-edge detector)
Blocks placed	20 (not counting the input levers or buttons the view adds)
Box	5×2×5 (50 blocks of space)
Made of (the blocks that change state)	comparator, copper bulb, observer, redstone wire, repeater, sticky piston
Inputs / outputs	IN (repeater) / OUT
The same build is also	at least 26 ticks (1.3 s) · 20 blocks (the same blocks, listed as another kind)
Design file	`pulse-oneshot-rising-edge-L26-v50-20b`

The design file

on GitHub

Design file (29 lines)

# One pulse when switched on: 26-tick pulse · 20 blocks
# https://vjeux.github.io/redstonepedia/circuits/pulse/pulse-oneshot-rising-edge-L26-v50-20b.html
name: pulse-oneshot-rising-edge-L26-v50-20b
circuit: rising-edge
port input: -1 1 0
port output: 3 1 1
origin: 0 0 0
palette:
  A minecraft:repeater[delay=3,facing=south,locked=false,powered=false]
  B minecraft:repeater[delay=4,facing=north,locked=false,powered=false]
  C minecraft:comparator[facing=west,mode=compare,powered=false]
  O minecraft:observer[facing=north,powered=false]
  R minecraft:redstone_wire
  S minecraft:sticky_piston[extended=false,facing=east]
  W minecraft:waxed_copper_bulb[lit=false,powered=false]
  r minecraft:repeater[delay=1,facing=south,locked=false,powered=false]
  s minecraft:stone
layer 0:
  .
  ...sO
  ..s.W
  ..s.s
  ..ss
layer 1:
  SO
  ..WCR
  ..r.B
  ..A.B
  ..RRs