Need circuit to magnetize a magnet

D

David Bezinque

Guest
I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

TIA
David Bezinque
 
David Bezinque wrote:
I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

TIA
David Bezinque
Click to expand...
If you're not gonna do this a lot, just use the caps and a switch made
from some nails that cross. Sacrifice the nail to make the magnet.
mike

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David Bezinque wrote:
I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

TIA
David Bezinque
Click to expand...
In pursuing another hobby in another life, I used to rebuild antique gas
engines, and had the occasional opportunity to rebuild a magneto, and
recharge the magnets in it. Do a Google search for "magnet charger" and
several good designs will pop up. Not all designs require the caps, but
you do need a source of instantaneous high current. Most magnet
chargers I have seen are supplied by car batteries, but there are some
that run from the AC line. Here are a few samples:

http://www.magnetoparts.com/inst_guides/charger/page1.htm
http://www.oldengine.org/members/rotigel/Magnet/
http://www.old-engine.com/magsum.htm

This may also be of interest:
http://www.smokstak.com/forum/showthread.php?t=4296

Nels
 
"David Bezinque" <dabezinque@comcast.net> wrote in message
news:5lmph1dqp9s3dfe6gudueh0vjgc15pg1eg@4ax.com...
I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

TIA
David Bezinque
Click to expand...
In UK, a very good but politically incorrect method is to rectify the 240V
mains with a 6 amp bridge rectifier and feed the DC to a dozen heavy turns
wrapped round the magnet to be.
Switch on and of course the local fuse blows but in the few mS it takes for
this to happen, a frighteningly high magnetic field has been developed which
can magnetise just about anything within its grasp.
(switch off any nearby PC's beforehand and act dumb when the neighbours
start knocking on your door :)
regards
john
 
"john jardine" <john@jjdesigns.fsnet.co.uk> a écrit dans le message de
news:dfl0ho$nuk$1@newsg1.svr.pol.co.uk...
In UK, a very good but politically incorrect method is to rectify the 240V
mains with a 6 amp bridge rectifier and feed the DC to a dozen heavy turns
wrapped round the magnet to be.
Switch on and of course the local fuse blows but in the few mS it takes
for
this to happen, a frighteningly high magnetic field has been developed
which
can magnetise just about anything within its grasp.
(switch off any nearby PC's beforehand and act dumb when the neighbours
start knocking on your door :)
regards
john
Click to expand...
Hey John, wasn't this that last Friday 11:45AM that you did it the last
time?
(we had a huge power sag here that shut off my PC )


--
Thanks,
Fred.
 
On Mon, 05 Sep 2005 18:58:00 -0500, David Bezinque
<dabezinque@comcast.net> wrote:

I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

TIA
David Bezinque

What type of magnet material and what's size of the magnet?
Click to expand...
Make a BIG difference in what you need.
Mike
 
In article <5lmph1dqp9s3dfe6gudueh0vjgc15pg1eg@4ax.com>, David Bezinque wrote:
I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.
Click to expand...
40 turns of 22AWG surplus telephone wire around your magnet candidate
(or wire from insidde cat5 cable etc), wear safety goggles, gloves etc
hook it to one end of a set of quality 400A jumper leads, hook the other
end to a car (or truck, forklift, submarine etc) battery.

when the smoke clears you'll have a permanent magnet. :)

Bye.
Jasen
 
"Fred Bartoli"
<fred._canxxxel_this_bartoli@RemoveThatAlso_free.fr_AndThisToo> wrote in
message news:431e9e58$0$24560$636a15ce@news.free.fr...
Hey John, wasn't this that last Friday 11:45AM that you did it the last
time?
(we had a huge power sag here that shut off my PC )


--
Thanks,
Fred.


Late Friday?. Mmmm ... . Oops!, that would have been the Mk2 ball plasma
Click to expand...
experiment. I usually wait until the national grid is lightly loaded.
(the doctors tell me the sight in my remaining eye will return in few days
:)
regards
john
 
On Mon, 05 Sep 2005 18:58:00 -0500, David Bezinque
<dabezinque@comcast.net> wrote:

I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.
Click to expand...
Anyone know how magnets are made commercially?
I was under the impression that they were made in ovens,
with a steady applied field that was maintained while the material
cooled below its Curie point. True?


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator
 
On Thu, 08 Sep 2005 12:18:52 GMT, NoSpam@daqarta.com (Bob Masta)
wrote:
<snip>
Anyone know how magnets are made commercially?
I was under the impression that they were made in ovens,
with a steady applied field that was maintained while the material
cooled below its Curie point. True?


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator
Click to expand...
I don't know about all magnets, but I built an impulse magnetizer for
a small business that manufactures high performance motors for people
who race slotcars. He buys the uncharged cermaic material in the shape
he needs then anchors two the uncharged pieces in the magnetizing
chamber of the magnetizer, pushes the button and a few milliseconds
later he has matched pair magnets for a motor. When the magnets lose
their strength from heat etc, he just recharges them the same way he
made them.
I think most magnets are made this way, but I'm sure there are special
types that require more elaborate procedures.

Mike
 
On Thu, 08 Sep 2005 12:39:17 -0500, Mike <nomtrxspam@comcast.net>
wrote:

On Thu, 08 Sep 2005 12:18:52 GMT, NoSpam@daqarta.com (Bob Masta)
wrote:
snip
Anyone know how magnets are made commercially?
I was under the impression that they were made in ovens,
with a steady applied field that was maintained while the material
cooled below its Curie point. True?


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator

I don't know about all magnets, but I built an impulse magnetizer for
a small business that manufactures high performance motors for people
who race slotcars. He buys the uncharged cermaic material in the shape
he needs then anchors two the uncharged pieces in the magnetizing
chamber of the magnetizer, pushes the button and a few milliseconds
later he has matched pair magnets for a motor. When the magnets lose
their strength from heat etc, he just recharges them the same way he
made them.
I think most magnets are made this way, but I'm sure there are special
types that require more elaborate procedures.

Mike
So howdja build it? Can you post a circuit or a link?
Click to expand...
Thanks,
Eric
 
<snip>
So howdja build it? Can you post a circuit or a link?
Thanks,
Eric
Click to expand...
Sorry, but I'm still selling a scaled down version for the guys to use
so they can "zap" their magnets and not have to send them off to get
them zapped. Anyway I don't have a website or anyway to draw an
electronic version of the schematic.

Mike
 
On Mon, 05 Sep 2005 18:58:00 -0500, David Bezinque
<dabezinque@comcast.net> wrote:

I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

TIA
David Bezinque
Click to expand...
Bottom of the page...use it to recharge many magnets?

http://www.unitednuclear.com/magnets.htm

Or this?

http://www.consult-g2.com/course/chapter5/chapter.html

Ironically, in two searches I did, your post shows up in the top 5...
:)

Tom
 
On Thu, 08 Sep 2005 12:18:52 GMT, NoSpam@daqarta.com (Bob Masta)
wrote:

On Mon, 05 Sep 2005 18:58:00 -0500, David Bezinque
dabezinque@comcast.net> wrote:

I am a high school Physics teacher and I need a circuit to magnetize a
magnet. Several years ago, I saw one in a book published by TAB.
Unfortunately, I have forgotten the title. I do recall that the
circuit had about a dozen LARGE capacitors and an SCR.

I already did a search using Google, Yahoo, etc. I found a few
circuits but nothing that gives part numbers or the kind of detail a
newbie needs.

Anyone know how magnets are made commercially?
I was under the impression that they were made in ovens,
with a steady applied field that was maintained while the material
cooled below its Curie point. True?
Click to expand...
According to what I read, it has to be very quick.

Tom

Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator
Click to expand...
 
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