Item Frame Combo Lock — Minecraft Tutorial

Welcome back settling here the 14 wo for a snapshot Mojang released a cool feature which allows you to basically use redstone to determine how rotated an item is in the item frame and so you can use that to make for instance a combo lock and this is something I showed in

My snapchat video now in this video I’m going to give you a tutorial for how to build this for yourself and after you watch the video and not only understand how to build it but also how it works it’s actually fairly simple and it uses some cool components which you can

Probably use in other creations so first let’s go over what the feature is itself here we’ve got an item in an item frame if I take the item out of the item frame notice the comparator is off now when I put the item back in the comparator is

On and it’s got an output of one that is one piece of redstone dust here is lit up when I rotate that item is the redstone torch now the comparator is outputting too and so two lamps are lit up and as I keep rotating it three four

Five six seven eight this is the largest value you can get the comparator to output if I rotate it one more time it’s going to go all the way back to where it started which was one so this is what the feature is and it lets you read

Basically rotational state of an item on the opposite side of a block so this can this redstone comparator can be hidden behind a wall and this item frame is on the other side of the wall so over here this is the basic component that we’re going to repeat several times in order

To build our combo lock we can see I’ve got the torch rotated up in to the left this is okay so the default state of the torch is down so this would be one two three four so this is the fourth rotational state and we can see it’s

Outputting a redstone signal of four one two three four the four four pieces of redstone dust are turned on now in this state the output line here is all off but you’ll notice if you watch that redstone dust in the background as I rotate the item frame that turns on

Unless the stick of the torch is pointing up in to the left that means you know this part of the torch is pointing up into left and yeah so any anything that isn’t up to the left that redstone is going to be on so basically what the circuit back

Here does is it determines if the rotational value of the object in the frame is pointing up to the left or is in the fourth state and the way it does this is sorry about that I had to restart minecraft I’ve been having problems with the lag a little bit in in

The snapshots anyway the way that it does the the comparison is basically I’ve marked off four spots here and that’s the point where I want the redstone dust to be in order for this output line to be off and so I’ve put a torch on the side here and since we have

An output of four this torches off if it if the redstone signal goes up into the the fifth value so that the redstone dust on this on this red wool block is turned on it’s going to trigger this repeater so basically if the signal is

Too low then the torch will be on and basically be like this the torch would be on if the signal is too high then the repeater here is going to be on so only if it’s exactly this value of four will this circuit turn the output of the

Circuit here turn off and so that’s the that’s the basis and we’re just going to repeat this kind of circuit several times we’ll use different numbers of green blocks to indicate basically the combination for the lock now I’m going to go ahead and build it so one two

Three four five six seven should do it I’m going to do three combo a three-piece combo just like in my first example so first I’m going to put down the item frames and I’m going to put in the redstone torches in the item frames and then I need something to read those

Item frames so I’m going to put down comparators on the opposite side of the wall you can see they’re already turning on because there’s an item in that in frame now what I’m going to do here is I’m going to pick the combo that I want

To actually use so here I’m going to turn this one that way I’m going to go maybe down into the right and then to the left sure so I’m gonna pick my combo that’s going to be the first step of actually building the lock now at

This point I’m going to add a bunch of wool here and I’ll probably be deleting some of this wool later but I’m going to add all this wool so that I can see what the current redstone output of each of these signals is so I’m going to

Basically just place things until I see dust that’s off so this dust is off I can go ahead and break everything so that only the dust that’s on is remaining this one was a bit longer I rotated it a bit more I’ll even have to add more more of these blocks out here

And yeah so I can get rid of these two blocks because the redstone dust was off and you can it can be kind of hard to see if you’re not used to it I work with redstone a lot but you can see there’s no particles coming off of this one that

Means it’s off it’s a little bit hard to tell just based on color but the particles always tell and then here we’ll do the same thing okay so this one is off delete these I’m gonna add a red block at the end of each of these just

Like I have over in the example circuit over here and we’ll put our piece of redstone dust up there as well now I’m going to put a redstone torch on the side of the last green wool block on each of these lines and also just like

The circuit over there and then I’m also going to put down a couple blocks at the end of these and this is going to house the repeater which tests if the signal strength is too large and so now you can see we’ve just built the the sample

Circuit four or three times so do it like that and since the combo is right all of these are going to be off right now so so basically if I rotate this one at all you’ll see the output here turns on and so but if it would set to that

Exact value pointing to the left like we had it it’ll be off so we have the combo programmed in now at this point all we have to do is connect all of this redstone dust and the outputs together so I’ll just do that and then I need this one connected as

Well I guess we can just do it like this doesn’t really matter how I connect it as long as the distance between the farthest piece of redstone dust and wherever you’re trying to get the signal to is less than 15 so 1 2 3 4 5 6 7 8 9

10 11 12 let’s just go ahead and add a repeater here and that’ll make sure that no matter what this the outputs of any of these lines is going to make it to where we want it to go I’m going to put a door here now I’m using a cool trick

Here you’ll notice that I place the door kind of facing this way so right now the door is actually closed technically but you know from here it looks like it’s open and which way is open to which way is closed as a matter of opinion on

Tours but with the current way we have it it’s unpowered now if I actually go ahead and power this line you’ll see it powers this block which is next to the door so the door will close when it’s powered and it it’ll open when is unpowered from this point of view from

The point of view of where I placed it it’s going to open when it’s powered and no ya open when it’s powered and closed when it’s unpowered anyway so now we’ve built the combo log this is actually done if I go ahead and reset it okay I’ll have to remember okay it’s his

Bottom left bottom right left okay so let’s just go ahead and reset these back to default okay so now I go okay this bottom left bottom right and yeah okay I did remember it yeah so ever every additional combo element that you add I have three here for each

Additional one it’ll multiply the number of possible accommodations by eight so right now we have 512 if you added another another item frame here you would have what is that like 2,000 roughly if you added another one it’d be 16 thousands so you can get you can get

It to be as secure as you want no one’s going to try to enter 16,000 combinations manually so that’s pretty much how it works that should tell you everything you need to know about how to build this yourself this is a simpler version probably the simplest version of this

Type of lock that you can build generic B had a really cool version with only a single item frame and you had to enter in multiple pieces of combination with item frame that was really cool but it’s a bit more difficult to build so I thought I would just do tutorial this is

Not this is not redstone rocket science exactly but it’s probably useful for a lot of people out there just trying to figure out how to use redstone so that’s about it thanks for watching