WIP: Modding a Disney Compass

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Post  HIGH5orDIE on Fri Dec 06, 2013 8:35 am

I am taking on a "little" project. I want my plastic Disney compass to appear more realistic but not only that I want it to spin aimlessly at the flick of a switch or possibly using magnets. Not much in the way of funds for this project as I write but should really get going here in a week or so. I started preparing the surface for paint and making room the internals... whatever it is I decide to use it's gonna have to be pretty compact.

WIP: Modding a Disney Compass  6340e908-f192-4f2f-8d94-1c31e12a15da_zpsc9985ca2
WIP: Modding a Disney Compass  3f600b4e-fe00-4d15-bc54-bc95b02a3134_zpsc29457c4

My initial thought was to use the internals from one of these [see video below] but it's way too big and not to mention loud. So I'm thinking a micro computer fan, a 9v battery and a momentary button. Also as I stated earlier I think there may be a way to rig up magnets to get the thing to spin on its own using negative resistance but haven't really looked into it.
If you have some input, screenshots that show good detail on the compass, or a question let me know.


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Post  Banditxx1 on Fri Dec 06, 2013 12:33 pm

I also modified the plastic compass, but for me it´s not necessary, that the needle spins and turns...

So here´s my result:

WIP: Modding a Disney Compass  00210  WIP: Modding a Disney Compass  003_310

WIP: Modding a Disney Compass  01312 WIP: Modding a Disney Compass  01010
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Post  HIGH5orDIE on Fri Dec 06, 2013 1:00 pm

Nice! I like the compass rose on yours. Do you have that image on file?
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Post  Banditxx1 on Fri Dec 06, 2013 1:28 pm

No sorry.... but I know, that you can find the different compass roses in the www. There are at least three different versions ...

You´ll find these informations here:

http://jacksparrowcostuming.wikispaces.com/Compass
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Post  Mondas42 on Fri Dec 06, 2013 1:41 pm

How will you gear down the fan? Most computer fans have a very high rpm and will make the spinner almost take off if not geared down Shocked
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Post  Blade Savvy on Fri Dec 06, 2013 1:46 pm

2 speeds.... Off and Take Off!!! Why are we not out on a Friday night??? Shocked Laughing 
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Post  HIGH5orDIE on Fri Dec 06, 2013 3:31 pm

I am not 100% sure it will work but I am gonna try making what I believe is called a magnetic vortex... sounds complicated but it isn't.

I will create a sort of spindle with the compass rose disc combined with two acorn head nuts, one for the top of the spindle and one for the bottom. A magnet will be centered in a static position on the underside of the compass rose. The spindle will likely rest on a stack of washers with the head of the bottom acorn nut resting in the beveled center of the washers, which may require some bearing grease to allow it to spin freely... not sure until I test it. The top acorn head nut will be affixed in the center of the top/face of the compass rose, it will rest directly under and in the base of the sun dial, which will also be the beveled center of a washer. Inside I will affix magnets in a circular pattern with the northern polarity facing inward which in turn should compress the magnetic wave to the center causing the static magnet to spin... forever. Suspect 

I sketched up a rough diagram as

WIP: Modding a Disney Compass  224bf052-526e-4674-ab4c-c01c0b55e658_zps95e6c44f
WIP: Modding a Disney Compass  1206131500a_zpsad78ba9e
WIP: Modding a Disney Compass  1206131500b_zps128deae6
WIP: Modding a Disney Compass  1206131500d_zpsc47caed4

And here is youtube vid of a dude doing something similar...
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Post  HIGH5orDIE on Sun Dec 08, 2013 4:37 pm

Mentioning magnetic vortex's quiets people pretty quick... gonna have to try that on the wife Razz 
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Post  liarr on Fri Dec 13, 2013 3:30 pm

many of us have a magnet in the compass, just under the dial, matching up with an opposing magnet in our palm gloves.
I used rare earth magnets, which are quite strong - it sometimes feels like the compass will jump out of my hand, cause MAGIC.
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