How many repeaters a delay needs and how to build a clock for a target period.
A repeater delays a signal by exactly 4 ticks — two ticks on and two ticks off. It is the basic element of any delay circuit.
From 1.20.5 repeaters have a 1–4 tick setting, so almost any delay can be built from repeaters alone. On older versions the remainder had to be made up with torches.
For very long delays a hopper clock is better: a hopper moves one item every 128 ticks, and nine slots form a loop.
Enter the delay you need in ticks.
Choose a method: repeaters, torches, or a hopper clock.
Get the block-by-block breakdown with each element's contribution.
Remember a full signal cycle is twice the delay — it travels out and back.
A repeater gives exactly 4 ticks, so the remainder cannot be made. From 1.20.5+ shorter repeaters cover it; before that you needed torches.
Each repeater occupies one block. A one-minute delay is roughly 30 repeaters in a line.
About 5 repeaters needed.
The delay divides by 4 — repeaters set to 4 ticks are enough.