An AND gate will only turn on the redstone if both levers are in the on position. I personally don't find too much use for AND gates because I play on a Creative Server, but there are applications for everything. Like if you want pistons to be constantly extended until you flip the switch and then they pull back, you would use a NOT gate. You use this if you have a mechanism that you want to always be on, except when you flip a switch. When you turn the switch off, the redstone turns on. When you turn the switch on, the redstone turns off. That's what this guide is for, and I assure you that there's no test at the end!Ī NOT gate is exactly the same as the simple Input/Output (also referred to as an I/O) gate above, except that the output is reversed. Don't worry about them, because you don't have to memorize what each one does. Now's where we start getting into weird, capitalized words like NOR, OR, AND, XOR, etc. See, you probably didn't know that you've already used a logic gate! NOT Gate If you've ever powered a redstone creation with a switch, this is the type of logic gate you used. There's a direct relationship between turning on the switch, and turning on the redstone. You flip the switch off, the redstone turns off. You flip the switch on, the redstone turns on. This one is a block with a switch on it and some redstone coming out the other end. The important part is that all the connections remain intact, even if they're connected by long strings of redstone wire. The models below are all made compact for convenience, but they can be spread out as much as you want, provided that you add enough repeaters. Either your redstone is powered, or it isn't. These gates are all about input and output, and in Minecraft, as well as in digital logic, there's only two possible types of inputs and outputs-ON and OFF. Starting from the very beginning, the term 'logic gate' just refers to an object that you put one or more inputs into and get one or more outputs from. So, if you've been frustrated by logic gates before or are interested in learning them from scratch, hold on to your butts! The Basics Unfortunately, if you don't already have a basic knowledge of digital logic, the Minecraft Wiki doesn't really do a very good job of explaining what they are and what they do. Without knowing what all of these gates do, knowing how to make them is entirely useless. This handy graphic above is only really half the battle. The ability to add multiple switches to your machines is just a small part of what logic gates can do. However, by incorporating logic gates into your redstone designs, the applications are nearly limitless. Many people get so discouraged by their failures with redstone that they give up using it entirely, or never progress beyond using simple switches.

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