[Noisebridge-discuss] Active magnetic levitation

Thu Sep 16 04:23:48 UTC 2010

I usually don't send a ton of replies to a mailing list message like this,
but I felt that it was worthy to note that while searching on
http://Alibaba.com for products, I followed a whim and searched for the key
word "levitation" which brought up results containing a number of rare earth
magnets, toys and gadgets but what really caught my attention was in the
"Alternate energy" section there were a large number of listings for Wind
Turbines that claimed to use MagLev technology. It makes sense. I wonder how
cost effective it would be to use controlled electromagnets, powered by the
turbine to enhance turbine performance rather than using rare earth magnets.
I could check to find out exactly what the difference would be but it would
take my focus away from my work tonight.

http://www.alibaba.com/products/levitation/--410401----------------Y.html

BR,

TCS

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On Wed, Sep 15, 2010 at 10:38 PM, Thomas Stowe <stowe.thomas at gmail.com>wrote:

> Oh and http://Mekonik.Wordpress.com has some decent resources too,
> including an arduino controlled setup that implements a sensor and a link to
> some code to handle the setup. Here's the complete tutorial on this
> particular arduino levitation setup:
>
> http://mekonik.wordpress.com/2009/03/17/arduino-magnet-levitation/
>
> <http://mekonik.wordpress.com/2009/03/17/arduino-magnet-levitation/>And
> some resources taken from this wordpress blog page:
>
>
> March 4, 2009 by mekonik <http://mekonik.wordpress.com/author/mekonik/>
>
> I found a couple of interesting *magnetic* *levitation* projects online
> when I was doing research for my Arduino magnet *levitation* project<http://mekonik.wordpress.com/2009/03/02/my-first-arduino-project/>.
> I was also pointed out some really cool projects that I didn’t know about
> by  visitors of my blog and of my Arduino forum thread. Here’s the list:
>
>    -
>    http://de.sevenload.com/sendungen/Computerclub2/folgen/N7wXqna-Folge-20-Computer-club2 –
>    video from a German podcast (in German), *levitation* starts at 16:25,
>    they use ATmega8 and a Hall effect sensor in the base
>    - http://bea.st/sight/*levitation*/ <http://bea.st/sight/levitation/> –
>    combined with a wireless energy transfer, uses ATtiny26, two Hall sensors on
>    the coil, one on each side to compensate for the coil’s field. Also, check
>    out his wirelessly powered levitating bulb.
>     <http://bea.st/sight/levitation/>
>    - http://amasci.com/maglev/maglev.html – *magnetic* cradle, this is a *
>    levitation* *above* electromagnets. Uses an array of coils with hall
>    effect sensors to mimic a *superconductor*.
>    - http://sites.google.com/site/simerlab/<http://sites.google.com/site/simerlab/levitating-globe> –
>    professional *magnetic* *levitation* devices, above electromagnets.
>
>
> Regards,
>
> TCS
>
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>
> On Wed, Sep 15, 2010 at 10:33 PM, Thomas Stowe <stowe.thomas at gmail.com>wrote:
>
>> I think that it might be neat to look into mechanical movement of the
>> parts that would be fixed if you create a device like the others listed. It
>> could controlled by an arduino, done both to see if you can do it with
>> permanent magnets and also be neat to see if you could manipulate them when
>> the device(s) is in a fixed position or maybe while it's moving too. I'm
>> pretty sure that magnetic control of that type might be useful in some way,
>> whether it be in a machining or production process or in robotics.
>>
>> I'm thinking that it might be neat to create something to manage a plastic
>> extruder, radiate heat into the air rather than relying on a heat sink in
>> equipment that has to cope with heat exchange from an element connected to
>> the body of the equipment or another piece of equipment but relies upon an
>> arm that is susceptible to heat. It might be that you can do something with
>> this in a makerbot.
>>
>> Or maybe some kind of control mechanism for mechanical movement. What
>> comes to mind when I think of magnetic controlled movement is the magnets
>> that create a friction increase and decrease effect that makes my recumbent
>> exercise bicycle harder and easier to pedal based upon a controller on the
>> bike that controls the distance of magnets from disk that spins when a user
>> pedals on it.
>>
>> It might be also that a novel application for ball bearings could be
>> developed from it. In fact, I'd hazard to guess that somewhere it already
>> has.
>>
>> Also...
>>
>> I figured you'd like this and so would the fellow who mentioned
>> diamagnetic effect in materials. From what I gather, diamagnetic effects
>> allow levitation at room temperature. This is a google docs viewed .doc
>> document on the principles of Maglev trains and mentions some interesting
>> facts like that a poweful magnetic field of about 16 tesla must be used to
>> levitate water drops and some living creatures. Is this what you had in mind
>> more than playing with magnets to make legos with metal or magnets attached
>> hover? I find it more fascinating, myself. :)
>>
>>
>> http://docs.google.com/viewer?a=v&q=cache:GbTynSTQBsYJ:www.digitaledition.org/adveng/AE0201/AE0201_019-028.pdf+microcontroller+superconductor+magnetic+levitation&hl=en&gl=us&pid=bl&srcid=ADGEEShTL3H3MZ1rOQwQWbSUqdmoJ-93kJgkAv-x5AwoxFBlftWrQ2vc7Z5o60qaFBCv5gFxIpONJn5GQ67pkby5q9L38qqZvG0TGDVgZowRwlaaIZclRPVeEd4nsczIn4vKmm3Xb0HK&sig=AHIEtbQ3ftpKeYq7roWquB75be_cFsgSUA
>> <http://docs.google.com/viewer?a=v&q=cache:GbTynSTQBsYJ:www.digitaledition.org/adveng/AE0201/AE0201_019-028.pdf+microcontroller+superconductor+magnetic+levitation&hl=en&gl=us&pid=bl&srcid=ADGEEShTL3H3MZ1rOQwQWbSUqdmoJ-93kJgkAv-x5AwoxFBlftWrQ2vc7Z5o60qaFBCv5gFxIpONJn5GQ67pkby5q9L38qqZvG0TGDVgZowRwlaaIZclRPVeEd4nsczIn4vKmm3Xb0HK&sig=AHIEtbQ3ftpKeYq7roWquB75be_cFsgSUA>
>>
>> I also found these two pages interesting:
>>
>> http://en.wikipedia.org/wiki/Magnetic_levitation
>>
>> &
>>
>> http://www.fys.uio.no/super/levitation/
>>
>> Though this second link may seem rather simplistic, have a gander at the
>> pages linked on this page. I feel both a newbie and vetted hacker who's
>> studied magnetic levitation and superconductors can gain something from
>> this, at the very least having some decent MagLev bookmarks to share with
>> others. =)
>>
>> Anyhow, I hope that this has helped you or helped others with some
>> additional resources in some small way.
>> I have a friend who goes to Noisebridge from time to time (Travis, if
>> anyone knows him) who suggested that I join this list (I live in San
>> Antonio, TX) because you folks bring up topics that I'd be interested in and
>> low and behold, from both the archive and live list, he was right. I hope i
>> can join in and add my two cents, research skills or experiences often and I
>> spend a great deal of time using the 'net and checking my e-mail as I work
>> at home. =)
>>
>> Best Regards,
>>
>> Thomas Stowe
>>
>> The information transmitted in this communication is intended only for the
>> person or entity to which it is addressed and may contain confidential
>> and/or privileged information. Any review, retransmission, dissemination,
>> copying or other use of, or taking of any action in reliance upon, this
>> information, or any part thereof, by persons or entities other than the
>> intended recipient, is strictly prohibited and may be unlawful. If you
>> received this in error, please contact the sender immediately and delete and
>> destroy this communication and all copies thereof, including all
>> attachments.
>>
>>
>>
>> On Wed, Sep 15, 2010 at 9:00 PM, Jonathan Foote <jtfoote at ieee.org> wrote:
>>
>>> Don't forget diamagnetism (negative magnetic moments not subject to
>>> Earnshaw's theorem).
>>>
>>> Mike Kan had a little static levitation demo (using pyrolitic
>>> graphite?) at the old space: ask him about it, it's super-cool.
>>>
>>>
>>>
>>> On Wed, Sep 15, 2010 at 2:07 PM, David Kelso <david at kelso.id.au> wrote:
>>> > I'm trying to levitate some small objects.
>>> > I know you can't have stable equilibrium with permanent magnets, but
>>> > is there a way to do it with microcontroller controlled
>>> > electromagnets?
>>> > This is an area I have no experience in - just had some ideas for a
>>> > project and wanted to see what was possible. Any experiences / reading
>>> > material would be highly appreciated.
>>> >
>>> > david
>>> > _______________________________________________
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>>> >
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>>
>>
>
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