Exactly, what I think also.

I bought silicon glue already and tested as perfect
for 50C. Then just need to find glass.
inside this book shaped container, there are supporting
structure that make all pcb under etching stand up.
Supporting structure should has apperance, like
pc cpu heat sink. Container size should be letter paper.

As air bubbling mixing, I am suspisious about uneven.
mechanical shaking is the best way to mixing. Shaking,
or titling, are same. So, I will build a titling
table, instead difficult shaking table.

For heating. I remember there are a kind of
kitchen dish warmer, built of glass with heating
wire printed underneath.

Today, I tried aqurium air pump. air flow
very low. I returned the one I bought and
using a Weller heat station, that has
better and quieter air pump.

My perfect book shaped etching unit,
will be still build later.





----- Original Message -----
From: "PicDude" <picdude2@narwani.org>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Tuesday, May 31, 2005 3:24 PM
Subject: Re: [EE] pcb eching tank. I find a perfect one


> On Tuesday 31 May 2005 10:52 am, microsoftwarecontrol scribbled:
> > have a look what I find, from garage:
> > a bottle heater, 300W and 50 to 110C temperature setting.
> > full plastic and heating surface is taflon
> >
> > http://www.webjb.org/pub/img/05133/000_0964.JPG
> > ...
>
> I guess "perfect" is different for everyone.  My idea of perfect would be
a
> clear container which has a width and height as big as I would need to
make
> boards, but only 1" thick.  This way the board stays vertical.  Then
increase
> the width a bit to hold an aquarium heater and an aquarium air pump.
Simple,
> low-cost and gets the job done well.  Drill a hole in the corner of the
board
> first and secure a nylon wire tie thru it so it can be pulled out easily.
>
> Cheers,
> -Neil.
>
>
>
> --
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