Minecraft – What’s the largest size of “door” I can open with a single switch

minecraft-java-editionminecraft-redstone

I'm fairly new to using redstone, and I'm wondering what's the largest size of "door" that can be opened with a single switch?

I have a huge arena, and I'd ideally like to be able to hit one switch and open a large door to release the monsters. When I say "door", it doesn't necessarily need to be a door. For example, I once had a 2×3 door that opened via sliding blocks and sticky pistons.

Best Answer

You could make a 5x5 piston door using stick pistons - but if you're new to Redstone this may not be for you.

There is also an option of making a "gravel door" (I am unsure if this works in the latest version of Minecraft).

A slightly easier piston door may be a 3x3 version.

Finally, you could use the design in my question here, the 2 high x 3 wide door, but make the door a lot longer - say 2 x 30 by wangling pistons and repeaters. If you wanted to "release" Endermen you'll need a bigger door, however.