Hey all, got those super powerful Neo magnets today...

[glen]

So, what is the smallest Neo magnet that will hold a picture onto the fridge?

 

[Eli]

Originally posted by: glen
So, what is the smallest Neo magnet that will hold a picture onto the fridge?

Depends on the weight of the picture..

If you're just talking about a piece of paper, the smallest one you could possibly find would.

 

[element]

Originally posted by: LordMorpheus
tesla coils don't use magnets.

set up a base of something like 3 magnets, and just have some random object perpetually floating in your room.

Won't work, the floating object will just flip around and stick to the magnets on the base.

What you have to do, if you want to levitate one of those magnets, is set up an electromagnet with a closed feedback loop.

One way is to get a laser/detector pair, preferably infrared. Set it up so when the beam is blocked the electromagnet turns on. It willl repel just until the beam is blocked and then it will allow it to fall until it clears the beam. The magnet should hover, but you have to get the distances right for it to work.

 

[ThisIsMatt]

I have some that came from ancient hard drives...they're pretty sweet. One will hold to the underside of my wrist with another one on top. Just can't let them slide or they'll pinch the side of your arm bad enough to draw blood :Q

 

[Howard]

Originally posted by: element

Originally posted by: LordMorpheus
tesla coils don't use magnets.

set up a base of something like 3 magnets, and just have some random object perpetually floating in your room.

Won't work, the floating object will just flip around and stick to the magnets on the base.

What you have to do, if you want to levitate one of those magnets, is set up an electromagnet with a closed feedback loop.

One way is to get a laser/detector pair, preferably infrared. Set it up so when the beam is blocked the electromagnet turns on. It willl repel just until the beam is blocked and then it will allow it to fall until it clears the beam. The magnet should hover, but you have to get the distances right for it to work.

No, it should work if you get something diamagnetic.

Get a small sphere of bismuth; that should work.

 

[DanTMWTMP]

Originally posted by: ThisIsMatt
I have some that came from ancient hard drives...they're pretty sweet. One will hold to the underside of my wrist with another one on top. Just can't let them slide or they'll pinch the side of your arm bad enough to draw blood :Q

not the way ancient ones, they still used a gear/ribbin/servos to move around. But this was a huge hdd that had only like what..500some kb? lol

What yr hdd did you pry open? I have a couple older ones like 100 meg ones and 2 gig ones🙂

 

[element]

Originally posted by: Howard

Originally posted by: element

Originally posted by: LordMorpheus
tesla coils don't use magnets.

set up a base of something like 3 magnets, and just have some random object perpetually floating in your room.

Won't work, the floating object will just flip around and stick to the magnets on the base.

What you have to do, if you want to levitate one of those magnets, is set up an electromagnet with a closed feedback loop.

One way is to get a laser/detector pair, preferably infrared. Set it up so when the beam is blocked the electromagnet turns on. It willl repel just until the beam is blocked and then it will allow it to fall until it clears the beam. The magnet should hover, but you have to get the distances right for it to work.

No, it should work if you get something diamagnetic.

Get a small sphere of bismuth; that should work.

Bismuth will not levitate, it's too heavy.

 

[screw3d]

Now you are really making me itching to get some 😀 Seriously though, how hard is it really to seperate them? Just trying to get an idea of its strength compared to normal magnets

 

[MacBaine]

Maglevs use electromagets which can be turned on off, and positive/negative. You won't be able to do anything like that with your magnets.

 

[Rufio]

u cn work out with them.
just seperate them 10 times a day and u will be uber strong.

 

[KevinF]

http://www.scitoys.com/scitoys/scitoys/magnets/gauss.html

 

[MaxDSP]

ordered a 197 piece assorted set yesterday from ebay for $35 shipped. I have absolutely no use for them, dont know why I ordered em.

How many people have wasted money on these magnets because of glen and his original thread? :beer:

 

[Howard]

Originally posted by: element

Originally posted by: Howard

Originally posted by: element

Originally posted by: LordMorpheus
tesla coils don't use magnets.

set up a base of something like 3 magnets, and just have some random object perpetually floating in your room.

Won't work, the floating object will just flip around and stick to the magnets on the base.

What you have to do, if you want to levitate one of those magnets, is set up an electromagnet with a closed feedback loop.

One way is to get a laser/detector pair, preferably infrared. Set it up so when the beam is blocked the electromagnet turns on. It willl repel just until the beam is blocked and then it will allow it to fall until it clears the beam. The magnet should hover, but you have to get the distances right for it to work.

No, it should work if you get something diamagnetic.

Get a small sphere of bismuth; that should work.

Bismuth will not levitate, it's too heavy.

"small"

 

[Shockwave]

Originally posted by: MaxDSP
ordered a 197 piece assorted set yesterday from ebay for $35 shipped. I have absolutely no use for them, dont know why I ordered em.

How many people have wasted money on these magnets because of glen and his original thread? :beer:

Not me 😛

I spent 6 years machining them, the fun factor wore off long ago.

 

[ThisIsMatt]

Originally posted by: DanTMWTMP

Originally posted by: ThisIsMatt
I have some that came from ancient hard drives...they're pretty sweet. One will hold to the underside of my wrist with another one on top. Just can't let them slide or they'll pinch the side of your arm bad enough to draw blood :Q

not the way ancient ones, they still used a gear/ribbin/servos to move around. But this was a huge hdd that had only like what..500some kb? lol

What yr hdd did you pry open? I have a couple older ones like 100 meg ones and 2 gig ones🙂

No clue, it was a long time ago. They were full hight 5.25" drives, though (one would take up two 5.25" bays).

 

[glen]

I still have not recieved mine.
I called the post office and they said all they know is that the company used their software to print a shipping lable.