Lego Combination Safe

Lego Combination Safe
Do you need a place to store your money, but you don't want to spend a lot on a strongbox? Then try this lego version, it's a little less theft-proof than a real one, but it comes close.

I've seen a few combination safes on youtube, but they all used an at least 5 times bigger mechanism than this one. So if you build this safe you have less chance to run out of lego bricks before you're finished.

IMPORTANT: Before you decide to build this, look at the second picture below! Those are the fancy pieces needed. The first, the nine curved bricks, are absolutely required, but not necessarily in red. The two springs, are not extremely important; without it, the door doesn't 'jump' open as you can see in the video below. All other pieces I used, are common lego pieces which belong in an average lego collection, or are well replaceable by a surrogate.


So if you decide to build it, proceed to the next step!
 
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Step 1The Rotors

The Rotors
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1: A round brick. Take three of these, as you can see in the bottom of the image. Each will be a rotor, number them 1,2, and 3, because later on, we'll treat each one different.
2: Place three curved bricks around it, leaving a gap which will be the rotor's notch.
3: A 4x4 plate on top of it.
4: Another round brick, on top of the plate.
5: Cover the rest with tiles.
6: Another plate, on top of the round brick, only for rotor 1 and 2.
7: Now place a 1x1 round brick on the top plate, the place of it will influence the number sequence of your safe. See the next image, an animated gif, to learn where you can put it.
8: Rotor 2 should be exactly like this. Rotor 3 aswell, but without the plate plus 1x1 round brick at the end. For rotor 1 you only need to add the two round plates at the beginning, without the stuff sticked in them.
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241 comments
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Jul 6, 2011. 9:47 AMpickle5 says:
i have like a TON of parts but not the right ones for any lego instructables
Dec 10, 2011. 7:03 AMskolsox says:
you can order individual pieces on the cheap form lego.com under pick a brick
Dec 24, 2010. 5:45 PMipwnupeep says:
id just get a hammer and smash the whole thing open and jack the money
Nov 6, 2011. 5:45 AMLegoScorpion381 says:
Ya funny thing...Still an AMAZING idea
Aug 3, 2011. 12:45 PMInfinite_minus_zero says:
Thus the problem remains: legos come apart. :P
Aug 10, 2011. 7:19 AMjobard says:
This is not supposed to be really "safe". I wouldn't put anything valuable inside it, but it's a great gadget
Aug 10, 2011. 8:56 AMInfinite_minus_zero says:
haha, ya. or maybe you could glue the pieces together.
Jul 18, 2011. 4:15 PMjharvison says:
do you think you could add a parts list because its a real pain to go through the whole thing and come up with a list it would be extremely helpful and i hope it wouldnt be to hard to do please reply
Jul 26, 2011. 1:57 PMjharvison says:
im sorry i was kinda in a bad mood when i posted it and now that i look at it i completely agree with you about it being comprehensible and i guess i can just make my own sorry about snapping at you like that i hope that in the future we can have better conversations than this
Jul 24, 2011. 9:48 AMNE patsrock says:
OMG
Jul 20, 2011. 8:54 AMjhawthorne1 says:
forgot ma com and why cant i breack into mine
Jul 6, 2011. 9:44 AMpickle5 says:
i have like a ton of parts but i seem to not have enough for lego instructables
Jun 28, 2011. 3:54 AMakõre1 says:
its so so COOL ,i want to bild it but i can t
Jun 25, 2011. 2:23 PMlego dude 305 says:
cool but can you make a mechanism with less of the curve pieces
Jun 17, 2011. 4:18 PMninjaaa says:
Awesome!
May 15, 2011. 11:11 AMcornonthecobert says:
Anyone know a way to download the instructions without having to pay to be a pro member?
May 19, 2011. 8:35 PMcornonthecobert says:
@merijnvw, you don't need to be a pro member to see the text, but you need to to download as PDF (or print, @TheGeek1984
May 15, 2011. 11:44 AMTheGeek1984 says:
At the top click "Print PDF" then right click the link and click "Save As", choose where you want it saved, and click "Save".
May 19, 2011. 8:35 PMcornonthecobert says:
@merijnvw, you don't need to be a pro member to see the text, but you need to to download as PDF (or print, @TheGeek1984)
Dec 20, 2010. 12:03 PMsoccernoodle says:
wow this is amazing but i only have 8 of the curved pieces :( i am currently searching for the 9th one. wish me luck!
May 15, 2011. 10:49 PMpie R []ed says:
make it with 1 less rotor...
May 15, 2011. 11:26 AMscistone says:
I DON'T HAVE ANY! WAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!
May 15, 2011. 11:27 AMscistone says:
U think I could make it without using legos?

I don't have some of the peices.
May 15, 2011. 10:12 AMjackerboy says:
i want to make this but i dont have enough peices
Apr 19, 2011. 10:10 AMatomiclegocreations says:
my comment below states that the rotor gets stuck. I mean that the rotor will stop. I guess because it's lose. A good shake or tilting the thing works, so I guess I fixed it. the only problem is constructing the box. I have this little coin dispenser thing and I worked so hard on it that I'm just not willing to destroy it. Would this work as a box?: The base of the locking thing would link with the bottom of the safe, then the top of the lock would be covered up with Legos.
Apr 27, 2011. 3:29 PMatomiclegocreations says:
Actually, don't bother to think about it now.

I took it apart to get pieces and now after a LOT of creations I've made a coin bank that can hold a lot of change.

Sorry about that (but hey, now you don't have to think about a loose rotor)

But hey, thanks!
Apr 23, 2011. 9:58 AMuberdum05 says:
I once made a lego safe that used the NXT set and a motor but it was easily defeatable by pushing a phillips head screwdriver into where the motor was located then turning it 90 degrees...
Apr 18, 2011. 6:08 PMatomiclegocreations says:
for some reason, the 2nd rotor (behind the rotor with the dial) gets stuck at a point when it grabs onto the 3rd rotor. I've tried to do something, but it keeps doing it. Could you help?
Apr 9, 2011. 3:47 PMpgardner says:
can i just use bricks to go around the red circle?
Mar 12, 2011. 7:07 AMLego man 201 says:
This is probaly the easiest thin i've made because my cousin is an awseome lego builder and sent me a whole bag and taught me how to do a lego thing. Pictures coming
Jan 18, 2011. 5:40 PMdobie354 says:
I cannot wait to try probably the hardest (and coolest) thing i have ever made
I made a different version of a safe but it wasn't as cool.
(it didn't have the padlock type thing)
Jan 9, 2011. 2:56 PMC.D33 says:
Can you please update it with a parts list?
Dec 28, 2010. 8:43 AMnfk11 says:
mhmmmmmm.yeah im from teyhas also known as Texas.i just like to call it teyhas.
Dec 20, 2010. 9:12 AMnfk11 says:
which country you from
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Author:merijnvw(my company)
I'm Merijn and I live in The Netherlands. As my job I make websites. I study Artificial Intelligence.