BS and Rare Earth Magnets
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Posts: 46,084
I have an application(circuit and battery) that is very small and
would like to be able to stick up anywhere with a magnet(from an old
hard drive). Question- will the magnet cause problems for a micro
(like the BS) if yes and I go to a more simple route(i.e.
MOSFET,transistor,...), will the same problems apply?
would like to be able to stick up anywhere with a magnet(from an old
hard drive). Question- will the magnet cause problems for a micro
(like the BS) if yes and I go to a more simple route(i.e.
MOSFET,transistor,...), will the same problems apply?
Comments
iphillips@s... writes:
> I have an application(circuit and battery) that is very small and
> would like to be able to stick up anywhere with a magnet(from an old
> hard drive). Question- will the magnet cause problems for a micro
> (like the BS) if yes and I go to a more simple route(i.e.
> MOSFET,transistor,...), will the same problems apply?
>
>
I wouldn't want to take the chance. Have you tried Mounting Foam Tape from
your local drug store? Very, very strong - I use it in countless applications.
Sid Weaver
W4EKQ
Port Richey, FL
[noparse][[/noparse]Non-text portions of this message have been removed]
a lot.
Ian
Original Message
From: Newzed@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=a5wdb7RikNZl6ZYH0VQG-W9SxZkholNiLfH8YdQRU6hO4_3SiW2yAJICNv-LnNY4kTwfi2QISV4]Newzed@a...[/url
Sent: July 29, 2003 4:59 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] BS and Rare Earth Magnets
In a message dated 7/29/2003 4:57:05 PM Eastern Standard Time,
iphillips@s... writes:
> I have an application(circuit and battery) that is very small and
> would like to be able to stick up anywhere with a magnet(from an old
> hard drive). Question- will the magnet cause problems for a micro
> (like the BS) if yes and I go to a more simple route(i.e.
> MOSFET,transistor,...), will the same problems apply?
>
>
I wouldn't want to take the chance. Have you tried Mounting Foam Tape
from
your local drug store? Very, very strong - I use it in countless
applications.
Sid Weaver
W4EKQ
Port Richey, FL
[noparse][[/noparse]Non-text portions of this message have been removed]
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damage to the stamp or associated circuitry, except from a mechanical point
of view. You would have problems with anything that depended on magnetic
fields, ofcourse, and I suppose delicate structures that could be ripped
away by a powerful magnetic field (I've heard that people have to be checked
with metal detectors before they can enter an MRI gadget). if your're
concerned, and still want to use the magnet, you could probably rig up a
shield with mu-metal from an old CRT shield, or possibly just a regular
piece of steel.
just my 2.5c.
d...
>
Original Message
> From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=R0N91TbV2vLLy8Boa9A5WbattfL48kp05w7tpt0NR5BSi6S3SLrHBaXolhP0gXCkL8XgXV_BZhkOqIUpM6wu]iphillips@s...[/url
> Sent: Tuesday, July 29, 2003 2:15 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] BS and Rare Earth Magnets
>
>
> I thought about that but really wanted the ability to move stuff around
> a lot.
> Ian
>
>
>
Original Message
> From: Newzed@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=flZD1A5sHTb1wTLGODBqgVEMPhqyD_hnp498qUmcWB9pjO7ODXJYaW57apAkuonX-ULapr9ENDA]Newzed@a...[/url
> Sent: July 29, 2003 4:59 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] BS and Rare Earth Magnets
>
> In a message dated 7/29/2003 4:57:05 PM Eastern Standard Time,
> iphillips@s... writes:
>
>
> > I have an application(circuit and battery) that is very small and
> > would like to be able to stick up anywhere with a magnet(from an old
> > hard drive). Question- will the magnet cause problems for a micro
> > (like the BS) if yes and I go to a more simple route(i.e.
> > MOSFET,transistor,...), will the same problems apply?
> >
> >
>
> I wouldn't want to take the chance. Have you tried Mounting Foam Tape
> from
> your local drug store? Very, very strong - I use it in countless
> applications.
> Sid Weaver
> W4EKQ
> Port Richey, FL
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
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>
>
>
> To UNSUBSCRIBE, just send mail to:
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>
>
All of the BS2's operation is based on
CMOS logic and PIC processing -- there is
no magnetic material (like a hard disk or
floppy disk) involved. I assume you'll
have a 9-volt battery involved -- also
not a problem.
I believe MOSFET and transistors are also
pretty inert, magnetically.
I'm sure if I'm wrong on this, I'll hear
about it!
--- In basicstamps@yahoogroups.com, "iphillipsca" <iphillips@s...>
wrote:
> I have an application(circuit and battery) that is very small and
> would like to be able to stick up anywhere with a magnet(from an
old
> hard drive). Question- will the magnet cause problems for a micro
> (like the BS) if yes and I go to a more simple route(i.e.
> MOSFET,transistor,...), will the same problems apply?
--- In basicstamps@yahoogroups.com, "Ian Phillips" <iphillips@s...>
wrote:
> I thought about that but really wanted the ability to move stuff
around
> a lot.
> Ian
>
>
>
Original Message
> From: Newzed@a... [noparse][[/noparse]mailto:Newzed@a...]
> Sent: July 29, 2003 4:59 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] BS and Rare Earth Magnets
>
> In a message dated 7/29/2003 4:57:05 PM Eastern Standard Time,
> iphillips@s... writes:
>
>
> > I have an application(circuit and battery) that is very small and
> > would like to be able to stick up anywhere with a magnet(from an
old
> > hard drive). Question- will the magnet cause problems for a micro
> > (like the BS) if yes and I go to a more simple route(i.e.
> > MOSFET,transistor,...), will the same problems apply?
> >
> >
>
> I wouldn't want to take the chance. Have you tried Mounting Foam
Tape
> from
> your local drug store? Very, very strong - I use it in countless
> applications.
> Sid Weaver
> W4EKQ
> Port Richey, FL
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
I have a very strong rare earth magnet. I pass it over a couple of spare
chips and there was an attaction between the chips and the magnet. Not SNAP ! -
just a gentle pull. There is something magnetizable in the chip - maybe its
the pins.
Sid Weaver
W4EKQ
Port Richey, FL
[noparse][[/noparse]Non-text portions of this message have been removed]
circuit to diminish the magnetic susceptibility at the circuit location.
I've done this with a hall sensor on one end of a nylon standoff and a
button magnet at the other, to make a movable stand. The hall sensor
detects another close magnet, but is insensitive to the button magnet.
Dennis
Original Message
From: iphillipsca [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=IR8wkKCAzes-Ta0imHI_WOcZ67kDSET9a0EIzdNW_zboJOJ0bgW1NjP1Yti-6gDCMONT3GNF9sO48Up4ck94idk]iphillips@s...[/url
Sent: Tuesday, July 29, 2003 1:54 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] BS and Rare Earth Magnets
I have an application(circuit and battery) that is very small and
would like to be able to stick up anywhere with a magnet(from an old
hard drive). Question- will the magnet cause problems for a micro (like
the BS) if yes and I go to a more simple route(i.e.
MOSFET,transistor,...), will the same problems apply?
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
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magnetically active compounds in the DIPs.
The point of my earlier post was that there
is no operation in the chips that depends
on these magnetic properties.
When you store data in an eeprom or a
microprocessor's memory, it's
stored as a charge on a gate -- not as
magnetic domains aligned a certain way
on a piece of magnetic media.
Thus your magnet wouldn't 'erase' the
chip -- as it definitely would 'erase'
a piece of VCR tape.
--- In basicstamps@yahoogroups.com, Newzed@a... wrote:
> For Allen.Lane
>
> I have a very strong rare earth magnet. I pass it over a couple of
spare
> chips and there was an attaction between the chips and the magnet.
Not SNAP ! -
> just a gentle pull. There is something magnetizable in the chip -
maybe its
> the pins.
>
>
> Sid Weaver
> W4EKQ
> Port Richey, FL
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
(the SNAP!).
That's a concern with any IC though....so those precautions would be good to
take!
sb
Original Message
From: Newzed@a...
Date: Tuesday, July 29, 2003 3:30 pm
Subject: Re: [noparse][[/noparse]basicstamps] Re: BS and Rare Earth Magnets
> For Allen.Lane
>
> I have a very strong rare earth magnet. I pass it over a couple
> of spare
> chips and there was an attaction between the chips and the magnet.
> Not SNAP ! -
> just a gentle pull. There is something magnetizable in the chip -
> maybe its
> the pins.
>
>
> Sid Weaver
> W4EKQ
> Port Richey, FL
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
conductor with respect to the field. I tend to use Velcro as it is light
and cheap or double stick foam tape. Inductors would have some different
effects in a strong magnetic field depending on orientation, core material
etc but I doubt the stamp itself would be having problems because of this.
Larry
At 08:53 PM 7/29/03 +0000, you wrote:
>I have an application(circuit and battery) that is very small and
>would like to be able to stick up anywhere with a magnet(from an old
>hard drive). Question- will the magnet cause problems for a micro
>(like the BS) if yes and I go to a more simple route(i.e.
>MOSFET,transistor,...), will the same problems apply?
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Shouldn't be a problem magnetized other than it would attract ferrous
materials so you could get a short circuit if conductive filings are sucked
into the wrong areas.
Larry
At 06:30 PM 7/29/03 -0400, you wrote:
>For Allen.Lane
>
>I have a very strong rare earth magnet. I pass it over a couple of spare
>chips and there was an attaction between the chips and the magnet. Not
>SNAP ! -
>just a gentle pull. There is something magnetizable in the chip - maybe its
>the pins.
>
>
>Sid Weaver
>W4EKQ
>Port Richey, FL
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/