Download How To Make A Trapdoor In Minecraft With Redstone Pictures. A trapdoor is a solid, transparent block that can be used as an openable 1x1 barrier. Use the following search parameters to narrow your results aside from the redstone clock suggested earlier, there's a simpler but slightly touchier method.
Trapdoors can be powered with redstone, though this is quite uncommon as simply clicking them is often easier and way more compact. A minecraft trapdoor is a solid block that can be opened either upward or downward, depending on how it's placed. Water/lava can not pass through trapdoors.
Trapdoors are typically placed over a single block hole and operate much like a normal door.
The crafting process will create 2 spruce trapdoors at a time. They're also cheap, costing only a lump of redstone dust and a stick. Trapdoors can be activated by redstone. A 2 wide by 3 high piston door is easy enough to make, but you might not be able to find slime balls right away.