RE: [TCML] PC boards

[Aleš Chlubný <chluba1@xxxxxxxxxxx>]

I'm using hydrochloride acid with hydrogen peroxide but with some
modifications.
Cool down concentated 30-35% HCl acid, it's required if you are going to
etch large boards or you have not a lot of acid, because reaction are
exothermic and high temperature isn't good for peroxide. Put the acid and PC
board into plastic container and add a few drops of concentrated 30%
peroxid. Don't add peroxid directly to PC board but in distant corner and
move with container to mix the solution (locally increased concentration of
peroxid can be dangerous for PC board). You can drive speed of reaction by
adding more peroxid. If you aren't overshoot amount of peroxide, cooper will
dissolve fast but without any bubbles and fumes. If it bubbles, it can be
due too fast reaction or high temperature. In this cases you can try to cool
down the solution.
This method is the fastest and provides more capacity, with 1 bottle of acid
you can make a lot of PCB.

Ales.


> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx 
> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Scott Bogard
> Sent: Monday, January 28, 2008 10:17 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] PC boards
> 
> 
> Thanks guys,
>      I am already using perf board, but I have acquired 
> enough parts to make 5 drivers, so I figured PC board would 
> be the way to go.  also does anybody have any experience with 
> this etching solution, it sounds pretty good to me, as I 
> already have all the ingredients.
> http://www.instructables.com/id/Stop-using-Ferric-Chloride-etc
> hant!--A-better-etc/
> Thanks again.
> 
> Scott Bogard.
> 
> BunnyKiller wrote:
> > As far as perf boards go, they are fine if you like wires. I prefer 
> > the perfboard with the square copper tabs on the bottom. It 
> allows you 
> > to place components and then use solder bridges to route the path 
> > along the squares. If you need to correct a path, simply 
> heat up the 
> > solder in the area to be corrected and tap the board to 
> remove solder.
> > The only disadvantage to this method is the required amounts of 
> > solder....
> >
> > Scot D
> >
> >
> >
> > Peter Terren wrote:
> >
> >> You can still make some pretty significant things on 
> perfboard with 
> >> point to point wiring.
> >> Here is a packed mag-lev board with 4 IC's that still runs 
> fine after
> >> 2 years museum use.
> >> 
> http://tesladownunder.com/Magnetic%20levitation.htm#Magnetic%20Levita
> >> tion
> >>
> >>
> >> Even more extreme is this completely point to point art 
> piece. There 
> >> is no perf board, everything is point to point and 
> supported by the 
> >> connections to the supply rail. Still works after 20 years. 8 IC's 
> >> and perhaps 100 components 
> >> http://tesladownunder.com/Electronics.htm#Pyramid
> >>
> >> Peter
> >>
> >>
> >
> >
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> >
> >
> 
> 
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