I have tried to make mag screwdrivers with the rubbing trick, however
heating them and letting them cool while stuck to a strong magnet seems
to make a better and longer lasting magnet out of them.  I am sure there
are plenty of other ways.=20




-- Lawrence Lile, P.E.
Electrical and Electronic Solutions
Project Solutions Companies
www.projsolco.com

> -----Original Message-----
> From: Rich [mailto:rgrazia1@ROCHESTER.RR.COM]
> Sent: Wednesday, August 04, 2004 10:28 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [OT:] Microwave ovens was WIFI Waveguide antenna
>=20
> Any screwdriver made with ferrous material can become a magnetic
> screwdriver
> by simply rubbing the shaft back and forth against a strong enough
> permanent
> magnet. The magnetic field re-orders the position of the magnetic
dipoles
> in
> the ferrous material in such a way that they line up in the same
> direction.
>=20
>=20
> ----- Original Message -----
> From: "Alan B. Pearce" <A.B.Pearce@RL.AC.UK>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Tuesday, August 03, 2004 3:42 AM
> Subject: Re: [OT:] Microwave ovens was WIFI Waveguide antenna
>=20
>=20
> > >Heat up a screwdriver and stick it on this magnet
> > >and when it cools off it is a magnetic screwdriver.
> >
> > You don't need to heat it, just wipe it across the pole faces a
couple
> of
> > times.
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu
> >
>=20
> --
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