Minecraft block switcher thing (light switch)

This post will tell you how to make a block switcher in Minecraft with pistons, basically it will remove a block from a wall, and replace it with another block. This can be used with glowstone to make an effective light that you can turn on and off.

First you'll need to start with 2 normal pistons and one sticky piston, spaced out like this.

How to build a piston trapdoor

This tutorial will tell you how to create a piston trapdoor so that you can drop people and mobs into dungeons, lava pools, rooms full of sheep or any other evil things you can think of.

The trapdoor when closed

Create a raising piston bridge

This tutorial will tell you how to build a hidden bridge in Minecraft, which can be raised or lowered to allow you to successfully cross lava and water. It can be used to build a drawbridge across a moat, or to trick cows to stand on it before lowering them into the lava! That was a bit mean, sorry cows.

Lowered

Raised

Here's how you can make it, bear in mind that depending on how big your pool or moat will be you may need a lot of buckets of water or lava!

How to build a hidden lava entrance

Always looking for ways to hide my cake, I have built a new secret entrance, and I will share it with you. As long as you stay away from my cake! The secret entrance is well hidden and probably not going to be found, who's foolish enough to jump into a stream of lava!?

Nothing suspicious about this...

XOR Gates. How and why?

An XOR gate is a logic gate that takes 2 inputs, that can be ON or OFF and outputs ON only if the inputs are different, so if one input is ON and the other is OFF.

Now you may be wondering "why would I need an XOR gate anyway?". Well an XOR gate let's you turn a circuit on and off from 2 different places.

Here the 2 pistons can be extended or brought back in from either of the 2 levers.

Create a hidden passage underneath stairs.

There are a lot of secret passages and entrances you can make in Minecraft using pistons, here I will tell you how to create a hidden entrance underneath a stairway. Like the image below.

Redstone circuits that turn off in the reverse order they turn on

Here I will tell you how to create multiple redstone circuits, that when turned on activate in a particular order, and when turned off, each circuit will turn off in the reverse order it was turned on. If you are wondering what I mean here is a picture!

Sorry about the black text being hard to read!