Homebrew PCBs

Dave Kush is using a glass baking dish with glass marbles to hold the
board above the spinning magnet.

Link from my conference to Dave's page

http://buildyouridea.com/hardware/modus/phase_5/phase_5.html


--- In Homebrew_PCBs@yahoogroups.com, JanRwl@A... wrote:
>
>  
> In a message dated 12/23/2005 8:35:42 A.M. Central Standard Time,  
> lcdpublishing@y... writes:
> 
> Just a  thought on this subject, perhpas there is something there 
> that is  useful
> 
> 
> Sadly, there is a "thing" in there that makes the liquid spin, 
usually a 
> magnet in a fuzed-shut glass tube or a molded over (teflon?) jacket,
 etc.   
> Would NOT be useful around a vertical, flat, being-etched  PCB.  
>  
> Too bad the etchants are such nasty liquids, as the best way  would
be a pump 
> that sprays from many tiny holes in a straight line, so the  liquid
would 
> rinse down both faces of the board, being continuously mixed until 
depleted, so 
> always the same etch-rate, all over, until done.  But 
selection/paying-for a 
> pump that will handle the nasties with acceptably-little 
maintenance is SUCH 
> a drag!  The bubbling idea is second-best, but getting  the holes in
the 
> "pipe" and air-pressure just right for consistently-sized  and/or ideal 
> quantities/second bubbles is SUCH a variable hassle!  
>  
> Centrifuge.        JRR
> 
> 
> [Non-text portions of this message have been removed]
>