How to use a repeater in minecraft with pistons

Redstone Repeaters and Comparators

These two blocks look similar but perform quite different functions in redstone circuits.

Repeaters

Redstone repeaters are important components of any Minecraft redstone system.

They perform several functions.

1. They only allow current to pass one way.
   The repeater has an arrow on top; redstone current can only pass through in this direction: in through the back and out at the front.

   How to make a redstone repeater loop

2. How to make a redstone repeater loop
3. What does a redstone repeater do
4. What does a redstone comparator do
5. Redstone repeater circuit
6. Redstone comparator recipe

There is no sideways, upwards or downwards transmission, which is very useful when you're trying to place wires in tight spaces.

7. They amplify a current so as to extend its range.
   No matter what strength the current that goes in the back is, the signal that comes out the front is strong enough to travel 15 blocks.

   Therefore you can extend a wire as far as you like, as long as every 16th block is a repeater.
   This amplification means that placing a repeater at the end of a redstone wire where it meets its target delivers full power, not weak power.

8. They introduce a delay.
   Right-clicking on the repeater moves one of the little torches and adju
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