#password lock

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Password Lock for Whatsapp Android Messenger

I've recently created a simple password lock for redstone that makes use of the new comparator blocks' activation via item frames.

So first a simple explanation:

The item frame is a block that allows you to put an item within it. Originally allowing four different rotations, it now offers 8.

The comparator is a block used to, obviously, compare redstone signals. Being such a complex block, Notch decided to make it double as a block that gives non-redstone blocks the ability to power things. This includes furnaces, chests, end portal frames, cauldrons, jukeboxes, and, yes, item frames.

Here's a breakdown of the item frame-comparator relationship:

Putting an item in the frame creates one block of redstone power. Each rotation will create one extra block of power.

Combine this mechanic with the repeaters' ability to refresh a signal and the redstone torches' ability to swap a signal and we create this simple (yet useful) password system!

If it's hard to see, turning the right torches upside-down will open the door. This layout is completely customizable, allowing for 1,440 different password options. My design works off only two rotations for the torches: up and down. If a torch that does not need flipped is flipped, the signal it outputs will be too strong and close the door. If the torch still needs flipped, the signal won't be strong enough. Because of this, one torch turned off just a little bit will lock the door up again. There are no in-betweens that can make the password lock glitch and open instantly.

So here's a little view from behind:

The little lines coming off of each diamond block are your password system. Red ones do not require flipping, green ones do. As stated earlier, you can use these in any order you like. Your whole goal here is to prevent any redstone signals from touching that one block at the end there. If a red one is flipped, the repeater will increase the signal to that block. If a green one isn't, the torch will activate and turn it on. Simple, right?

Now how about that door, eh? Take a look at these command blocks.

Here's the part that doesn't even need the password system, and serves as a standalone device. If you haven't guessed yet, two of these command blocks will be active, and turning them off activates the other two. The top left and top right ones use the "/fill" command. Here are said commands in my build:

To open the door: "/fill ~ ~ ~ (bottom left corner) ~ ~ ~ (top right corner) minecraft:air"

To close the door: "/fill ~ ~ ~ (bottom left corner) ~ ~ ~ (top right corner) minecraft:stained_glass_pane"

The other two command blocks serve a purpose added at the last second. Upon finishing this creation, I realized that there was no sign that you got the password right. (Not to mention these "doors" just kind of disappeared.)

If you haven't guessed, they use the new "/playsound" command to play the door noises. If you use these make sure you enter this command first:

"/gamerule commandBlockOutput false"

This will prevent the chat from saying each time a door opens or closes. Here are the commands for the sounds:

Open: "/playsound random.door_open @a"

Close: "/playsound random.door_close @a"

So I hope this tutorial was useful and may lead to future designs. Like I've said, the command block door isn't the only thing you can hook this up to! Be creative!

Also, you don't have to use the item frames. You could also use levers, which can shorten the design tremendously. They just won't look good in environments like the one I'd created. The lever design, in terms of adventure maps, would look better in a mineshaft or castle.