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waterdogs
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24 Aug 2006, 11:17 am

does anyone like playing with magnets? i've always been facinated with them. i mean unseen forces are pretty amazing especially when you can't see them. also does anyone know if magnets have any positive health effects? i've seen some magnet bracelets before and wondered why people wear them.



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24 Aug 2006, 2:06 pm

I think the magnetic bracelets supposed to be a treatment for arthritis. I would dismiss this treatment as a placebo, except that apparently they are also used on horses, who would not benefit from any placebo effect.

I like magnets. I use them to hold bits of paper up when my desk has no room on it.

A good place to find strong magnets is in old hard-drives. Takes a while to get the hard-drive open, but the magnets are worth it.



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24 Aug 2006, 2:50 pm

Have you tried neodymiun-iron-boron (NdFeB) magnets? They're the strongest currently available. I bought a few on ebay a while back. You have to be careful with them. They'll give you a nasty pinch, and they have a tendency to break if you let them snap together.



Musical_Lottie
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24 Aug 2006, 7:34 pm

Yay magnets! I've not played with them for so long!

They apparently stimulate circulation - which would make sense, blood having iron in it ...


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24 Aug 2006, 9:15 pm

blarpensparpa wrote:
Have you tried neodymiun-iron-boron (NdFeB) magnets? They're the strongest currently available. I bought a few on ebay a while back. You have to be careful with them. They'll give you a nasty pinch, and they have a tendency to break if you let them snap together.


I bought two large NdFeB ring magnets (like 3" x 1/2" thick) and made a
permanent magnet alternator and bought a carbon fiber wind mill blade
for it. I never made a wind tower but I tested the alternator on a test machine
and it worked fine! The magnets were super powerfull. I had to put a block of ice between the two rings and slowly allow them to connect (other wise they would
shatter or put me in the emergency room for a crushed finger)



Who_Am_I
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24 Aug 2006, 9:59 pm

I've always loved playing with magnets. :)


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waterdogs
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24 Aug 2006, 10:01 pm

blarpensparpa wrote:
Have you tried neodymiun-iron-boron (NdFeB) magnets
no! i don't have any money right now where would i get one? and how much do they cost? they sound badass.



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24 Aug 2006, 10:43 pm

My friend swears by magnets. She has high quality magnets that she wears most days and says people can tell if she is not wearing them just by the improvement in her mood. I have allot of magnet jewelry but it doesn't seem to do anything, maybe the magnets are not strong enough. I brought magnet insoles for my shoes and it seems to help my feet and legs.


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18 Sep 2006, 9:00 pm

waterdogs wrote:
blarpensparpa wrote:
Have you tried neodymiun-iron-boron (NdFeB) magnets
no! i don't have any money right now where would i get one? and how much do they cost? they sound badass.


Not sure of the exact makeup but the ones out of old hard drives are incredibly strong but brittle watch your fingers with these also.


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DirtDawg
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18 Sep 2006, 11:17 pm

Click the pic for one source.

Image



There are many suppliers. I used to order magnets from Edmund Scientific when I was a teen, way before neo-magnets were developed.


Scientific Online 8)


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18 Sep 2006, 11:22 pm

waterdogs wrote:
does anyone like playing with magnets?


I haven't in years, but I enjoyed playing with magnets when I was about 8 years old. One particular amusement I remember was getting a handful of metal shavings off a neighbor's garage floor, dumping the metal bits onto a piece of cardboard, and then moving magnets along the bottom of the cardboard to drag the metal around on the top of the cardboard. After a little practice I could "draw" some neat pictures that way, just dragging thousands of tiny metal shavings around with a magnet. It was pretty fascinating at the time, but I was easily amused. :lol:


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19 Sep 2006, 8:37 pm

I used to like playing with magnets as a kid. It was especially fun to try to push two north poles or two south poles (of magnets, that is; that's how they're called in physics) together, only to watch them resist. In fact, in my high school physics class, when we were studying magnetism, some kids in class were actually playing with magnets. It was particularly funny to watch, since they were one of the most hardcore NTs I've ever met.



waterdogs
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19 Sep 2006, 9:12 pm

DirtDawg wrote:
Image
those square shaped magnets rule



DirtDawg
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19 Sep 2006, 10:22 pm

So are the flat washer shaped ones. (Think bigger!) I used PA speaker magnets to make toroidial electromagnets which I mounted on a brass tube and controlled with a simple switching circuit. Now days they call it a "gauss gun". It wasn't very powerful, but Hey ... I was a kid playing with high voltage transformers from TVs, transistor switching circuits like in door bells, magnets from dead speakers and wire was cheap. I was just having fun.

I could only send a 3/8" ball bearing about 100 feet, but at 10 feet it would almost make it through a 1x4. You wouldn't want to try to catch it!


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waterdogs
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19 Sep 2006, 11:32 pm

i bought one of those Omega flashlights that are sold on TV, that don't take batteries and it has a pretty sweet cylinder magnet in it.