[Noisebridge-discuss] Active magnetic levitation

Thu Sep 16 07:23:58 UTC 2010

Wow! Thanks all for the feedback guys. I have a lot of reading to do.

And welcome to the list Thomas!

On Wed, Sep 15, 2010 at 9:23 PM, Thomas Stowe <stowe.thomas at gmail.com> wrote:
> 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/
>> And some resources taken from this wordpress blog page:
>>
>>
>> March 4, 2009 by mekonik
>>
>> I found a couple of interesting magnetic levitation projects online when I
>> was doing research for my Arduino magnet levitation 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/ – 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://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/ –
>> professional magnetic levitation devices, above electromagnets.
>>
>>
>> Regards,
>> TCS
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>> intended recipient, is strictly prohibited and may be unlawful. If you
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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
>>>
>>> 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
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>>> 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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>>
>
>