Leon wrote:
> ----- Original Message -----
> From: "jusdebra" <pookie_debra@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Wednesday, April 11, 2007 9:17 PM
> Subject: Re: [Homebrew_PCBs] Re: Newbie questions
>
>
>> OMG, my dad is a Dave Miller. Almost freaked me out when I saw it. I was
>> thinking, "Is he in this group?"
>>
>> Anyway, you guys have me confused again. Some recommend acid and some
>> alkali. I've worked with both in some very strong concentrations and know
>> how to handle them. I have a $300 respirator with O2 feed and lots of
>> gloves. My biggest question is the type of paper you use in the printer
>> so you can get a transfer. Where do you get it? Also a good source for
>> blank boards (single side to start with). What about software? Is there
>> a freeware that works good for simple layouts? Is there a standard
>> commercial package that everyone uses or is the most popular. I've read
>> about Eagle????
>> I've done some layouts by hand with a felt tip pen, but it's time
>> consuming and difficult to edit.
>
> We were discussing the photo etch process, not toner transfer. NaOH solution
> is for developing the resist after UV exposure.
I use 10% Na2CO3 sodium carbonate for the developing. Unlike NaOH,
it's much less reactive to skin.
> Everyone uses different software. I use Pulsonix which is excellent but
> rather expensive. A free version of Eagle is available that will do small
> boards, but it isn't an easy program to use. Then there is PCB (completely
> free) which is usually run under Linux. KiCAD is another free program.