So I have been looking over the Redstone Circuit guide on Minecraft Wiki, and its just not clicking to me. Does anyone happen to know any good tutorial videos about this witchcraft, or could give me a few examples or pictures to detail how circuitry works? I only know how to make basic one line circuits using Redstone Torches...
This is the easiest to understand, and I am sure you probably at least got that much, but essentially redstone torches are always on, unless powered redstone is connected to the block that the torch is on(see example 1), so a NOT gate is just a redstone torch connected to a block, with a trail of redstone powder going into the block(not the torch), if the redstone is powered(by a switch, button, pressure pad or another torch), then the torch will turn itself off.
Since redstone connected to the torch directly(not through a block) will be powered by that torch, if the torch turns off, so does that redstone.
I have shown both possible states of a NOT gate using switches(the objects at the bottom, the red dot in the right switch indicates that switch is on), so in short, a NOT gate between a switch and a door will cause the door to be open when the switch is off, and closed when the switch is on.
I know I probably over-explained it but the NOT gate is the only real gate Notch has added to Minecraft, because its the foundation of the other gates, so you need to understand it before you can understand the other gates.
Before I go onto the OR/AND gates, there is one other thing about Minecraft redstone torches that needs to be explained.
In Example 1 I try to show the 2 different ways a torch can be attached to a block, and the effect the redstone powder has on those torches, the left side shows a torch placed on top of a block, with 4 switches with redstone going into all 4 side, the top-left shows with one of the switches on, causing the torch to be off, essentially any ON input to a torch like that will turn it off, even if all the other inputs are OFF, bottom-left has all the switches OFF, leaving the torch ON.
The right hand side is the same thing, it just has a torch attached to the side of the block instead of on top of it, the result is the same, but any redstone powder placed next to the torch itself, will instead be powered by the torch, instead of affecting the torches own power.
So essentially, both torch setups represent a NOT gate, which is what Example 2 is showing, the left side only has redstone powder and torches, since the redstone on top of the block is right next to a torch, it gets powered by that torch, but since it isnt beside the other torch, it instead powers the block underneith, affecting the state of that torch, but the redstone that is not directly beside the torch, but instead next to the block that torch is on, is not powered by that torch.
The right side adds a switch that is ON, which turns the first torch OFF, cutting power to the redstone powder next to it, which lets the final torch switch back on.
It is essentially 2 NOT gates, which in turn is actually what the OR gate is....
Mostly explained above, an OR gate is really just 2 NOT gates, with all the inputs connected only to the first NOT gate, and as shown in Example 1, it will cause the torch to turn off if it is getting any power at all, which causes the second NOT gate to turn on, and as the picture shows, its INPUT 1 OR INPUT 2, if either input is ON, the output will be ON.
This is where things change a little, yet this is still only 3 NOT gates stitched together, and works on the same principals that I explained above.
The difference is each switch goes to its own NOT gate, it doesn't share the NOT gates with the other inputs, but all of those NOT gates power the same redstone powder trail, so if any one of those torches are ON(ie, the switch is OFF), that redstone will remain powered, which keeps the last NOT gate OFF unless every single switch is ON.
In the example of the AND gates I gave you can see the left one has both switches off, and the middle one has only 1 switch on, but the redstone is still getting power, causing that last torch to stay off.
Once both switches are on as in the right example, the redstone is no longer powered by anything, letting that final torch turn back on and opening the door.
This is something I did earlier which lets you add more switches to a AND gate:
As I explained, each switch has to have its own NOT gate, which connects to the same redstone powder, which connects to the final torch.
Hopefully I haven't completely failed and you get something out of this, in essence, while redstone can be used to create gates, the only true gate in Minecraft is a NOT gate, the others are just combinations of NOT gates, so you don't even need to think of the other gates to successfully build something in Minecraft, its really just a way to visualize and structure what you want to get done, and is easy to get the hang of for people already familar with NOT/OR/AND/etc(us programmers have it easy).
As long as you understood the way redstone powder connects and influences the torches you should be good to go :smile.gif:
Oh, and feel free to ask about anything I failed to explain properly, itd be easier to address specific questions rather then trying to generalize over the whole topic