Homebrew PCBs

Was the H2O2 you used the common over-the-counter drugstore variety (~3%) or the more concentrated (and very dangerous) lab supply kind.

 - jim


On Wed, 10 Jan 2007 08:50:01 -0800 (PST)
DB Express <dbxprss@...> wrote:

> I just etched my PS board this morning.  Not too bad for a first try:
> http://members.lsol.net/gop4evr/unlinked/psboard.jpg
> 
> I used homebrew etchant (2:1 hydrogen peroxide/muriatic acid).  At $2.69/gallon for the muriatic acid and 69 cents/quart for hydrogen peroxide, this sure beats paying $6/pint for the FeCl.  It works well, but has some odor.  I used it outside just as an extra precaution.
> 
> Those who were following this project on E101 will notice that I rotated the regs 90 degrees (to make room for the heat sinks and give better airflow).  It was suggested that I add some filled areas for heat dissipation, and I probably went overboard.  I figured that since I had the room to work with, the wider traces couldn't hurt anything and would also give me some fudge room in case of etching voids.  I am pleased with the result, which was made possible by the information I gleaned from this group and related web sites.  Thanks guys.
> 
> Nels
> 
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
> 
> If Files or Photos are running short of space, post them here:
> http://groups.yahoo.com/group/Homebrew_PCBs_Archives/ 
> Yahoo! Groups Links
> 
> 
> 
>