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Old 08-13-2010, 02:09 PM   #1
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Default DIY Build an Electric Motor to Impress your Friends (slightly homo)

The other night tw34k showed me a video on youtube where a guy built a simple "homopolar motor" out of a few neodymium magnets, a AA battery, and a well bent piece of solid core wire.
So yesterday I went to the hardware store and found a found neodymium magnets and built my own.


You can build your own in just a few minutes and show it to your friends.
If youre hanging out with somewhat intelligent people, they will find it pretty clever.
If youre hanging out with really dumb people you can tell them that it is magic, and they will be very impressed.
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Old 08-13-2010, 02:46 PM   #2
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You can build your own in just a few minutes and show it to your friends.
If youre hanging out with somewhat intelligent people, they will find it pretty clever.
If youre hanging out with really dumb people you can tell them that it is magic, and they will be very impressed.
So, what you are saying it's a win/win. Can't see YT at work but will check back later.
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Old 08-13-2010, 02:50 PM   #3
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cool, thats awesome

my kids and adult friends will think thats great.

I have those neo magnets in my oil filters of my moto-X and atvs.

I use a thick (maybe 7-8mm) hard drive magnet on the outside of all my on-road vehicles oil filters. Hmm - I should start a thread on it and not clutter this up
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Old 08-13-2010, 02:52 PM   #4
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cool, thats awesome

my kids and adult friends will think thats great.

I have those neo magnets in my oil filters of my moto-X and atvs.

I use a thick (maybe 7-8mm) hard drive magnet on the outside of all my on-road vehicles oil filters. Hmm - I should start a thread on it and not clutter this up
thats a pretty good idea, my buddy just took about 10 HDD apart and salvaged the magnets

If you have any round ones you can build one of these and post it up
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Old 08-13-2010, 02:53 PM   #5
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Quote:
Originally Posted by Full_Tilt_Boogie View Post
You can build your own in just a few minutes and show it to your friends.
If youre hanging out with somewhat intelligent people, they will find it pretty clever.
If youre hanging out with really dumb people you can tell them that it is magic, and they will be very impressed.
If you're carrying around neodymium magnets... well...
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Old 08-13-2010, 02:55 PM   #6
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Ha, that's awesome.
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Old 08-13-2010, 03:06 PM   #7
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My wife works in an after-school care program and is always looking for cool projects to do...gotta dig out some old HD's and crack them open.
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Old 08-13-2010, 03:09 PM   #8
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I just tried it and couldn't make it work. What's the trick?
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Old 08-13-2010, 03:09 PM   #9
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The magnets in HDD are shaped like a human kidney and won't allow for much spinning.

If you do bring them to the daycare hand them out and hang around and listen to the sound of weeping, wailing and lamentation as those magnets are no respectors of small innocent fingers.

They pinch they bite, they pinch pinch pinch, bite bite bite, the neodyium show.......
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Old 08-13-2010, 03:23 PM   #10
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I just tried it and couldn't make it work. What's the trick?
Is the bottom part of the wire making contact with the magnets? you have to have it dragging along, like the brushed of a motor to complete the circuit for the electromagnet (the wire)
If youre using ceramic magnets (the black kind), they may not be very conductive so youll have to wrap them in aluminum foil.
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Old 08-13-2010, 03:28 PM   #11
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Keep in mind if you're doing this with kids, the wire and battery will burn your hands if you have a small gauge wire and do it wrong. Just saying from experience.
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Old 08-13-2010, 03:42 PM   #12
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Keep in mind if you're doing this with kids, the wire and battery will burn your hands if you have a small gauge wire and do it wrong. Just saying from experience.
Yah, the battery gets cookin hot
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Old 08-13-2010, 04:03 PM   #13
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A little off topic, but I loled at this:

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Old 08-13-2010, 05:01 PM   #14
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Does it have to be an AA battery?
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