Homebrew PCBs

Okay, so you still have to put something in the fluid.  I didn't 
realize that and that too would be another problem - it might beat 
the PCB to death before I get the chance of letting it's magic smoke 
out!

Chris



--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
>
> On Fri, 23 Dec 2005 15:34:50 +0100, lcdpublishing  
> <lcdpublishing@y...> wrote:
> 
> >
> >
> > There is a spinning magnent under the top surface of the machine.
> >
> > You place a beaker of fluid on top of that surface and turn on 
the
> >
> > machine and the fluid spins like crazy - very good fluid 
agitation
> >
> > without any mechanical connections or hoses etc.  The things look
> >
> > neat as hell, but I have not idea what they are called or how
> >
> > exactly they work.
> 
> 
> This is called a magnetic stirrer. You drop a magnet, often coated 
in  
> teflon, in the glass and a rotating magnetic field spins it. Often 
those  
> machines are combined with a hotplate.
> 
> 
> Your expected drawbacks are probably why this isn't used very 
often for  
> etching.
> 
> 
> ST
>