# Cryptex 300 Combinations!

## by SolidWorksMagi, published Apr 30, 2010

Cryptex 300 Combinations! Apr 30, 2010

## Description

Somebody asked for a Cryptex ... so here\\'s a simple Cryptex with only 300 combinations ... I think the math is right ... for one ring;

Programming the combination is the little key tabs that slip into 1 of 3 positions for each of the 5 circular positions on a ring and there are 5 rings, with 5 choices each.

n P k = n!/(n-k)! = (5!/(5-3)! = 60 and with 5 rings = 300 combinations.

So much confusion on the math ... I'll look into it more ...

I just realized that if I use more rings (easy modification to this kit ... just make it longer with more coding cylinders) then it could be words or phrases ... standard size paper could result in over a dozen letters at this over-sized design.

If I spent a little more time on this all the rings could be the same width ... but this is enough to do the job and get the concept across.

Alas, there\'s no place for acid in a glass to break ... this is intended as a toy for children smart enough not to eat the programming keys.

The storage cavity is 50mm x 100mm ...

All these parts are MakerBotable too!

If I had access to a MakerBot to actually build and test my creations ... that would help.

This is another of many entries to the makezine.com/go/makerbot contest ...

blog.makezine.com/archive/2010/04/makerbot_giveaway.html

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good concept....PLEASE!! please!! i beg of you, make it makerbottable!! maybe make it a little bigger and turn the rings so they are printed flat! please? i really wanna print this!
There are 5 possible symbols on each ring so its actually only 5^5= 3125 total possible combinations. Which is a big step up from the 300 mentioned in the description (the title might confuse people tho).
Actually I think your math is wrong. With 5*10 symbols you get 10^5=100.000 combinations.

I donÃ‚Â´t see how your cryptex can be opened without all the rings falling off.
I also fail to see the actual pins on your InnerShellCoder-4-Cryptex-01 that lock it and test the positon of all rings at the same time. There should be 5 pins on the shell and a grove in every symbol-ring or 1 pin on e
ach symbol-ring and a long grove along the shell. (idealy also 9 dead-ends on the inside of each symbol-ring. Else lockpicking it
with your hands would be trivial due to the unavoidable machining-tollerances.)

(IÃ‚Â´m the one who posted that other cryptex.)

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## Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

## Instructions

MakerBot all the parts and figure out how to put the puzzle together!

If you successfully make this with a 3D printer please send me the build-file and machine type so it can be uploaded here for others to use.

#### Size

good concept....PLEASE!! please!! i beg of you, make it makerbottable!! maybe make it a little bigger and turn the rings so they are printed flat! please? i really wanna print this!
Actually I think your math is wrong. With 5*10 symbols you get 10^5=100.000 combinations.

I donÃ‚Â´t see how your cryptex can be opened without all the rings falling off.
I also fail to see the actual pins on your InnerShellCoder-4-Cryptex-01 that lock it and test the positon of all rings at the same time. There should be 5 pins on the shell and a grove in every symbol-ring or 1 pin on e
ach symbol-ring and a long grove along the shell. (idealy also 9 dead-ends on the inside of each symbol-ring. Else lockpicking it
with your hands would be trivial due to the unavoidable machining-tollerances.)

(IÃ‚Â´m the one who posted that other cryptex.)
There are 5 possible symbols on each ring so its actually only 5^5= 3125 total possible combinations. Which is a big step up from the 300 mentioned in the description (the title might confuse people tho).
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