Both sides were practically perfectly aligned. YAY!!!
It's tinned (sloppy job, have to redo it tomorrow), drilled and ready to get
silkscreened. I hope my Mouser order arrives tomorrow so I can finish
assembly.
I've started using a <container within a container> for etching; hot water
in the larger container, a bit of etchant in the floating smaller one. I
have to be a bit careful not to spill the etchant into the water, but it
works really fast.
I used to have to pass that green scrub pad a LOT of times to etch 1 oz.
PCBs when I used room temperature etchant. Now it's done in under a minute,
I think (didn't time it), with very little scubbing, it's more like a wiping
action to clear the surface of used etchant. Once the copper is all gone, I
just drop the PCB into the water to neutralize the etchant.
Then I pour the etchant into my 'used' tank and plop the small container in
the water too. I rinse the PCB, gloves, container and pad in the water,
very convenient setup, no moving across multiple containers, no more
dripping everywhere. And it's warm too, great for the hands. :D
I've been using ferric chloride with very good results. I store it in a
large jug (a 4 liter container of Slushie colouring). The used etchant goes
into a large laundry soap jug, very large screw caps, easy to pour into.
All containers and jugs are plastic.
Once I finish the ferric chloride I'm moving over to ammonium persulfate (I
think that's what I bought). I'm told it has less vapours and clear colour,
easy to observe the etching.
Robert
:)
-----Message d'origine-----
De :
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com] De
la part de Robert Hedan
Envoyé : avril 9 2006 13:33
À :
Homebrew_PCBs@yahoogroups.comObjet : [Homebrew_PCBs] Re: Best paper to use for toner transfer
... But right now, I'm going to try and make something out of this PCB.
Robert
:)