Instructables
Picture of Compass Table
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One day I was playing around with a compass and a magnet noticing how much fun it was to manipulate the compass rose as I moved the magnet around.  I'm of the mindset that when it comes to fun, more is usually better, so I rounded up 500 compasses and some rare earth magnets and decided to turn what started as just a little silly but entertaining play time into an actual piece of furniture.  

The compasses are inlaid into a custom table top underneath a piece of glass.  The coasters were made to match - they also provide an inconspicuous home for the powerful rare earth magnets that affect the compasses. 

Now I always know which way is north, and exactly where my cup of coffee is...er, so long as it's always on my compass table.

**Note, the reliability of compasses in mass quantities and close proximity decreases somewhat since compasses themselves are magnets.  It still works, and actually results in some pretty cool patterns, but if you're looking for the table to be 100% accurate, I'd recommend not designing a table that places them so closely together.  I'm a big fan of the way the table came out, as it's a toy just as much as it about the science of magnetism.**



 
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Step 1: Materials

Picture of Materials
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Screen shot 2010-02-25 at 4.24.13 PM (2).jpg
To make a compass table you need supplies for the top, the legs, and the tools to put it together.

Table
  • 12mm sanded plywood
  •  table legs - I used 4 Ikea Vika Oleby prefab legs
  • 16 7/16" x 1/8" thick glass circular top (I had this custom cut)
Coasters
  • a couple square feet of 6mm sanded plywood
  • 2 cork coaster inlay
  • 2 rare earth magnet
Compasses
  • approximately 500 "mini compasses".  I got mine for around 20 cents a piece off Ebay.  It takes 500 20mm compasses to cover a 16.5" circle - crazy I know!
Tools
  • router
  • circle jig
  • drill
  • wood glue
  • brush
  • polycrylic - water based clear satin wood finish
  • speed square
  • clamps
  • random orbital sander
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Bradin49451 month ago
What about adding wheels so you can turn it and all the compass arrows turn
jdoorenbos2 months ago

Very neat project! I love the simple and subdued look of the table. Have you considered putting small magnets in the bases of the coasters? It could be a fun way to visualize magnetic field lines!

noahw (author)  jdoorenbos2 months ago
Check out step 9 - the coasters have rare earth magnets embedded right into the bottoms.

Thanks for the feedback!
009agent made it!6 months ago

Finally finished my version! Thanks for the inspiration.

DSC_0338.JPGDSC_0339.JPG
shazni10 months ago
oh wow! That's so cool
mmorpgs1 year ago
Interesting project, thanks for posting it. I originally thought it would be a table with a homemade compass under it, but now I see it is 500 compasses lol. Have you tried making your own large compass?
funvill1 year ago
Here is my version I made for the Vancouver Maker Faire 2012
http://www.abluestar.com/blog/wp-content/uploads/2012/08/IMG_4790.jpg
noahw (author)  funvill1 year ago
That looks awesome! Did you modify an exiting glass top coffee table? I'm so glad that you decided to replicate this project and post a picture of the finished tab. Seriously - nice job.
jcbeaver72 years ago
This is the perfect idea for my woodworking class! Thanks!
vincent75202 years ago
Neat ! …
I also like the music playing on your video : very 50's !!!… cool.
This is fantastic Noah, great video too!
I saw this on a TED talk about the importance of sabbaticals, I wonder, are you that guy or did you both come up with the same idea ? I heard about an interesting phenomenon of Multiple Discoveries in a recent talk by David Wilcock
:D awesome! at first i thought it was a giant compass as a table :P
Great Job!!!!
xavec3 years ago
This is just outstanding. Top marks for thinking - as wiggins said below - hilariously big. I'm a total sucker for Epic Scale Silliness combined with good craftsmanship, so this sir, is a WIN XD
wiggins84723 years ago
Hilarious. Well done.
triumphman3 years ago
Dude, that's a lot of compasses! You'll never get lost!
mpino3 years ago
Fantastic! We're going to make one the nature center where I work, to help teach kids about the earth's poles, and orienteering, etc. Also, it's just a great toy for kids to play with!
mpino mpino3 years ago
aaaaand: we did!
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Nice table! Looks good.
After calculating the cost of the compasses, I can totally see why you arranged them that way
0jack mpino3 years ago
That is FABULOUS! Great use of the 'Ible.
Skylberg3 years ago
I agree with Muller....Want, want, want, want!
jimopertrat3 years ago
mate that is totally AWSOME!!!!
simi-kilr3 years ago
Nice project. Where can you find cheap glass?
nerys3 years ago
Ok thats just plain cool. I am going to have to do one of these one day.

as for sources of compasses? go a little nuts and even smaller compasses

http://www.dealextreme.com/details.dx/sku.4519

$2.54 shipped for 20 of them. figure what? 1500 of them for this project? $190

would also be cool to use different compasses IE one in the center much larger or spaces around to form a nice pattern

here are some of the cooler ones I found.

http://www.dealextreme.com/details.dx/sku.35475
http://www.dealextreme.com/details.dx/sku.11880
http://www.dealextreme.com/details.dx/sku.11896 (this one is big 6.3")
http://www.dealextreme.com/details.dx/sku.2834

More expensive but much larger and "nicer" for a larger version of this table?
http://www.rinovelty.com/index.cfm/fuseaction/products.detail/item/AMCOMPA/18pc_bulk_compass_set

18 of them for $26 just rip the compass itself out.

These are one of my favorites more money ($1 a pop but also much larger at 2")
http://cgi.ebay.com/60X-New-Plastic-Compass-Key-Rings-Wholesale-/380302127478?pt=LH_DefaultDomain_15&hash=item588bc5f176

best deal (same ones used here)

http://cgi.ebay.com/Wholesale-Lot-20mm-Small-Mini-Compasses-4-survival-kit-/130461497769?pt=LH_DefaultDomain_0&hash=item1e601c79a9

48 for $15 so 500 would cost about $165 you might be able to wheel and deal a better price ordering that many though.
144 for $8  on Oriental Trading
saronpaz3 years ago
you might find your project in a bit wider perspective in dunne & rabys placebo project from 2001 which includes amongst others a compass table.

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Jakeg3 years ago
I would love to do this project... But unfortunately I dont have the time (or patience) to do it... =(
Darwinfish3 years ago
That's really cool. Just when I thought I couldn't get any more lost... XD
Bitkid3 years ago
So all together how much total money was used to make this project?
Exocetid3 years ago
Not what i thought it was, but still clever! Being old and feeble, I thought it was a table where the top was a compass and pointed North via the coasters. Not as much fun as Noah's table, but just one compass instead of a gazillion--that is how many compasses are needed for this, isn't it?
how much did all those cumpases cost???
do the math 1 for 20c, he need 500, 500x0.2 or 1/5 of 500 is 100. it cost somewhere around 100 bucks.
ouch thats really expensiv for a table
 lol awesome video, i bet he ALWAYS knows were hes going :) awesome                      North East South West = Never Eat Soggy Waffles, but thanks to ur post, i can eat soggy waffles and STILL KNOW WHERE IM GOING!!! isnt that AWESOME?!?!!?
North, East, South, West
Never eat shredded wheat.
Our teacher taught us that in school, and I still use it to this day lol.
NEWS stands for north, east, west, south .
Never Eat Sour Worms
Our teacher taught us Never Eat Slimy Worms
xojess4 years ago
Oriental trading company sells those little compasses for $7.95 for 144! http://www.orientaltrading.com/ui/browse/processRequest.do?demandPrefix=12&sku=39/37&mode=Searching&erec=2&D=compasses&Ntt=compasses&Ntk=all&Dx=mode%2bmatchallpartial&Ntx=mode%2bmatchallpartial&N=0&requestURI=processProductsCatalog&sd=Mini+Compasses
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