I think that redstone in Minecraft is quite confusing, so I'm learning about it. Then I came across redstone repeaters. I read about them and it says they repeat signals and can delay ticks. What does that do (and what does it mean)?
Minecraft – the point of delays on redstone repeaters
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Best Answer
Repeating a redstone signal.
Think of a signal as in sending power to a redstone circuit.
Every redstone signal can travel up to 15 blocks before running out of power.
So basically every signal has a
power level of 0-15. A repeater resets the signal back to maximum power[15]. That way you can extend the signal on redstone circuits that are longer than 15 blocks.Delaying signals.
In minecraft, 20 ticks happen each second, so one tick happens every 0.05 seconds.
There is another type of ticks in minecraft, called a redstone tick.
Every redstone tick is equal to 2 game ticks(0.1 seconds).
Redstone ticks occur during redstone operations.
A repeater, by default, is set to one redstone tick (1/10th of a second delay). You can set it(by right-clicking it) up to 4 redstone ticks (4/10 of a second or 0.4 seconds).
Lets say you made a redstone circuit that activates and deactivates all the redstone lamps in a tunnel, and you want each set of lamps to activate/deactivate with an 1 second delay between each set. You would need to add 2 repeaters on 4 ticks and 1 more repeater at 2 ticks for a total of an 1 second delay.
Obviously, this a very simple way to use redstone repeater delays, but you understand the concept. Delays can be used for redstone clocks, pulse generators and lots more.
More information on the above: