Homebrew PCBs

On Wed, Sep 26, 2012 at 3:36 AM, dgh2259 <dgh2259@...> wrote:
>
> I think we can comfortably say its Ammonium Persulphate

Ammonium Persulphate is good (I like the colour), but won't etch
unless the temp is >70C (>160F).

> Ferric Chloride is a real messy affair!!

Yeah.  But it doesn't have to be, with the technique here:

  http://www.instructables.com/id/Sponge-Ferric-Chloride-Method-Etch-Circuit-Bo/

Uses a tablespoon of liquid, and etching is done in under a minute.
Nothing short of amazing.  For this reason, I went back to Ferric
Chloride.

My blog article about home-made PCBs:

  http://capnstech.blogspot.com.au/2011/05/playpause-making-pcbs-at-home.html

Mitch.