stays on 108 ticks (5.4 s) after · 28 blocks

How to try it

Press play under the view to watch the demo on a loop: input pulses of 1 to 80 ticks (4 s) (each output pulse lasts 108 ticks (5.4 s) longer than its input), then groups of 3 short pulses with growing gaps (closer than L, they merge into one output pulse). The badge reads demo with the step it is on, and 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): turn the input on, then off: the output stays on 108 ticks (5.4 s) after you turn it off.

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 4498 ticks (3 min 44.9 s).

in  2 ticks (0.1 s): 
in  3 ticks (0.15 s): +6 for 111
in  4 ticks (0.2 s): +6 for 112
in  5 ticks (0.25 s): +6 for 113
in  6 ticks (0.3 s): +6 for 114
in  8 ticks (0.4 s): +6 for 116
in 10 ticks (0.5 s): +6 for 118
in 15 ticks (0.75 s): +6 for 123
in 20 ticks (1 s): +6 for 128
in 30 ticks (1.5 s): +6 for 138
in 40 ticks (2 s): +6 for 148
in 60 ticks (3 s): +6 for 168
in 80 ticks (4 s): +6 for 188
in 120 ticks (6 s): +6 for 228
in 160 ticks (8 s): +6 for 268
in 240 ticks (12 s): +6 for 348
in 320 ticks (16 s): +6 for 428
3 inputs 2 ticks (0.1 s) apart: +6 for 124
3 inputs 4 ticks (0.2 s) apart: +6 for 128
3 inputs 8 ticks (0.4 s) apart: +6 for 136
3 inputs 16 ticks (0.8 s) apart: +6 for 152
3 inputs 32 ticks (1.6 s) apart: +6 for 184

Measurements

Notes from its designer

Keeps the output on for 108 ticks after the input turns off (a long off-delay): a small fast loop keeps a bigger, slower loop topped up, and once the input is gone the big loop counts down; each extra pair of comparators in the big loop adds 56 ticks. Details: stage 1 is a two-comparator loop (4-tick lap) that the input holds full; once the input stops it decays 2 per lap, so its output lasts at least 28 ticks. A repeater reading it powers stage 2, a three-comparator loop (6-tick lap) that loses only 1 per lap; stage 1's long output refills it evenly at full strength, and once stage 1 dies stage 2 counts its 15 levels down and the output goes dark at 0. Why not an item timer (a hopper draining k items at 8 ticks each, about 6 blocks for any length): the items move back only one per 8 ticks too, so an item timer needs an input about as long as its delay before it can time again, and it only comes in 8-tick steps; this loop refills in 3 ticks of input and keeps 2-tick resolution. For delays of many seconds an item timer is the smaller build.

Properties

The design file

on GitHub

# Stay-on timer: stays on 108 ticks (5.4 s) after · 28 blocks
# https://vjeux.github.io/redstonepedia/circuits/pulsemult/off-delay-2stage-k1.html
name: off-delay-2stage-k1
circuit: off-delay
origin: -5 0 -2
port input: 1 1 3
port output: -5 1 0
palette:
  S minecraft:stone
  d minecraft:redstone_wire[east=side,north=side,power=0,south=side,west=side]
  E minecraft:comparator[facing=east,mode=compare,powered=false]
  W minecraft:comparator[facing=west,mode=compare,powered=false]
  n minecraft:comparator[facing=north,mode=compare,powered=false]
  s minecraft:comparator[facing=south,mode=compare,powered=false]
  R minecraft:repeater[delay=1,facing=east,locked=false,powered=false]
layer 0:
  ..SS....
  .S.S....
  ..S.S.S.
  .....S.S
  ......SS
  ........
layer 1:
  .SWd....
  .s.d....
  .SESRSES
  .....n.d
  .....Sdd
  ........