Date: Mon Nov 27 10:05:43 2006 Back to Contents

Author: Gerald Zani

Subject: Re: IFO 3000

Post:
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I suspected that it was you.
You were VP elect that year. -- JZ

At 09:37 AM 11/27/2006, you wrote:

>JZ,
>
>Of course that would be me....I used it as part of my Resource Room App.
>
>Dale
>
>On Wed, 22 Nov 2006, Gerald Zani wrote:
>
>>Wow. Great research work, Dick.
>>
>>Who was it that brought one of these to the PIRA Resource Room a couple=
years ago? -- JZ
>>
>>At 11:28 AM 11/22/2006, you wrote:
>>>Greetings,
>>>
>>>Found using google and inputting =91levitating globe=92
>>>
>>>
>>>These electromagnetic suspended globes are actually high-tech=
instruments. A magnetic field sensor permanently measures the height at=
which the globes are suspended. This sensor feeds that data into a micro=
computer in the base of the unit. This computer than calibrates the=
electronic magnets at the top of the frame based on the distance between=
the globes and the top magnet to keep the globes correctly positioned. All=
in the blink of an eye! So not only do these look great on your desktop=
levitating in thin air, they are also technology marvels!
>>>
>>>
>>>How I think it works !!!
>>>
>>>The 9 inch world globe contains a large magnet inside the top and a small=
magnet inside the bottom. The top of the stand contains a large iron core=
electromagnet. The bottom of the stand contains a Hall effect magnetic=
field strength sensor. This senses the position of the globe by sensing the=
field strength from the small magnet in the bottom of the globe. The sensor=
provides input to the feedback circuit which controls the current provided=
to the electromagnet in the top of the stand. This feedback control circuit=
holds the globe in mid air. It provides rock stable levitation.
>>>
>>>The base of the stand is a large heat sink with some power transistors=
and parts I could not see without breaking the welded plastic. I could not=
see the Hall effect sensor. I will not break my $170. toy to try to see it!=
If you are a smart electrical engineer, you may be able to build this=
wonderful stable levitation system. It is no longer sold as far as I can=
tell. When you place the globe in the stand (in mid air), there is a solid=
notch it stays in. If you pull down on the globe, you can hear the circuit=
transformer hum as it sends more current to the top electromagnet to pull=
the globe up. This is a very good, very stable feedback control circuit. I=
have left it on for at least 8 hours at a time. The base gets warm. If you=
give the globe a good spin, it will spin for about 20 minutes before it=
slows down from air friction and the friction of the magnetic field itself.=
When you unplug the stand, the globe drops. The large magnet in the top of=
the globe will hold the globe hanging from the stand top when the power is=
off.
>>>
>>>This thing is really neat !!! =
http://www.geocities.com/d=
sligar.geo/globe.html
>>>
>>>
>>>
>>>Go here: interesting =
http://www.oz.net/~coilgun/=
lev_visual/home.htm
>>>
>>>
>>>
>>>Now I must get back to work.
>>>
>>>
>>>
>>>Dick
>>>
>>>
>>>Helping teachers who facilitate, motivating students who learn.
>>>Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130 =
440-826-0834
>>>www.cvcaroyals.org/~rheckathorn/
>>>Adjunct Physics Teacher - Baldwin Wallace College
>>>Physics is learning how to communicate with ones environment so that it=
will talk back.
>>>
>>>-----Original Message-----
>>>From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On=
Behalf Of Gerald Zani
>>>Sent: Wednesday, November 22, 2006 10:44 AM
>>>To: tap-l@lists.ncsu.edu
>>>Subject: Re: [tap-l] IFO 3000
>>>
>>>I dunno, but perhaps it has a spinning Levitron inside the globe, with=
the perpetuator hidden in the base?
>>>
>>>That device was on display in the resource room a few years ago. I think=
at Sacramento?
>>>
>>>I assumed it is some clever, careful arrangement of rotating magnetic=
poles. -- JZ
>>>
>>>At 09:43 AM 11/22/2006, you wrote:
>>>
>>>Does anyone know how this gadget works?
>>>
>>>http://scientificsonline.com/product.asp?pn=3D3036982&bhcd2=3D1164206070
>>>
>>>I measure pulses of alternating polarity coming from the head with a=
period of 10 ms. What I don't know is what sort of detector it uses. I=
suspect it must be either magnetic or rf as one can insert an opaque object=
between the globe and head without disturbing the levitation.
>>>
>>>It is an extremely cool attention getter.
>>>
>>>Cliff

Gerald Zani e-mail: Gerald_Zani@brown.edu
Manager of Demonstrations phone: (401) 863-3964
Department of Physics FAX: (401) 863-2024
Brown University Providence, RI 02912-1843 USA
=20
http://www.physics.brown.edu/physics/demopages/demo/
http://www.physics.brown.edu/physics/userpages/staff/Gerald_Zani/index.html
=20
Do a little more of that work which you have confessed to be good,
Which you feel that society and your most Just Judge rightly demand of you.
Cultivate the tree which you have found to bear fruit in your soil.
If you have any experiments you would like to try, try them.=20
Now's your chance.

Henry David Thoreau, Journal entry, 1850.


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I suspected that it was you.
You were VP elect that year. -- JZ
At 09:37 AM 11/27/2006, you wrote:
JZ,
Of course that would be me....I used it as part of my Resource Room
App.
Dale
On Wed, 22 Nov 2006, Gerald Zani wrote:
Wow. Great research
work, Dick.
Who was it that brought one of these to the PIRA Resource Room a couple
years ago? -- JZ
At 11:28 AM 11/22/2006, you wrote:
Greetings,
Found using google and inputting =91levitating globe=92

These electromagnetic suspended globes are actually high-tech
instruments. A magnetic field sensor permanently measures the height at
which the globes are suspended. This sensor feeds that data into a micro
computer in the base of the unit. This computer than calibrates the
electronic magnets at the top of the frame based on the distance between
the globes and the top magnet to keep the globes correctly positioned.
All in the blink of an eye! So not only do these look great on your
desktop levitating in thin air, they are also technology
marvels!

How I think it works !!!
The 9 inch world globe contains a large magnet inside the top and a small
magnet inside the bottom. The top of the stand contains a large iron core
electromagnet. The bottom of the stand contains a Hall effect magnetic
field strength sensor. This senses the position of the globe by sensing
the field strength from the small magnet in the bottom of the globe. The
sensor provides input to the feedback circuit which controls the current
provided to the electromagnet in the top of the stand. This feedback
control circuit holds the globe in mid air. It provides rock stable
levitation.
The base of the stand is a large heat sink with some power transistors
and parts I could not see without breaking the welded plastic. I could
not see the Hall effect sensor. I will not break my $170. toy to try to
see it! If you are a smart electrical engineer, you may be able to build
this wonderful stable levitation system. It is no longer sold as far as I
can tell. When you place the globe in the stand (in mid air), there is a
solid notch it stays in. If you pull down on the globe, you can hear the
circuit transformer hum as it sends more current to the top electromagnet
to pull the globe up. This is a very good, very stable feedback control
circuit. I have left it on for at least 8 hours at a time. The base gets
warm. If you give the globe a good spin, it will spin for about 20
minutes before it slows down from air friction and the friction of the
magnetic field itself. When you unplug the stand, the globe drops. The
large magnet in the top of the globe will hold the globe hanging from the
stand top when the power is off.
This thing is really neat !!!
http:=
//www.geocities.com/dsligar.geo/globe.html

Go here: interesting
http://www.oz.net/~coilgun/lev_visual/home.htm

Now I must get back to work.

Dick

Helping teachers who facilitate, motivating students who learn.
Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH
44130 440-826-0834
www.cvcaroyals.org/~rheckathorn/
Adjunct Physics Teacher - Baldwin Wallace College
Physics is learning how to communicate with ones environment so that it
will talk back.
-----Original Message-----
From: tap-l-owner@lists.ncsu.edu
[mailto:tap=
-l-owner@lists.ncsu.edu]
On Behalf Of Gerald Zani
Sent: Wednesday, November 22, 2006 10:44 AM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] IFO 3000
I dunno, but perhaps it has a spinning Levitron inside the globe, with
the perpetuator hidden in the base?
That device was on display in the resource room a few years ago. I
think at Sacramento?
I assumed it is some clever, careful arrangement of rotating magnetic
poles. -- JZ
At 09:43 AM 11/22/2006, you wrote:
Does anyone know how this gadget works?
p;bhcd2=3D1164206070>http://scientificsonline.com/product.asp?pn=3D3036982&am=
p;bhcd2=3D1164206070
I measure pulses of alternating polarity coming from the head with a
period of 10 ms. What I don't know is what sort of detector it uses. I
suspect it must be either magnetic or rf as one can insert an opaque
object between the globe and head without disturbing the
levitation.
It is an extremely cool attention getter.
Cliff

Gerald
Zani &n=
bsp; &nb=
sp; e-mail:
Gerald_Zani@brown.edu
Manager of
Demonstrations phone=
:
(401) 863-3964
Department of
Physics =
; FAX:
(401) 863-2024
Brown
University Providence,
RI 02912-1843 USA

http://www.physics.brown.edu/physics/demopages/demo/
http://www.physics.brown.edu/physics/userpages/staff/Geral=
d_Zani/index.html

Do a little more of that work which you have confessed to be
good,
Which you feel that society and your most Just Judge rightly demand
of you.
Cultivate the tree which you have found to bear fruit in your
soil.
If you have any experiments you would like to try, try them.=20

Now's your chance.

Henry David Thoreau, Journal entry, 1850.



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From tap-l-owner@lists.ncsu.edu Mon Nov 27 10:05:43 2006

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