Just checked out your page Tony, thank you for documenting your work so well -
makes learning a lot easier for newbies like me :-) Your method definitely
looks the most attractive (and easiest), so I'm going to give it a shot this
weekend. But one thing that I don't think you mentioned... how do you know when
the board is done? Is this just a qualitative observation? How long does your
method usually take (at normal room temp).

Thank you all again,

Jai

Quoting Tony Nixon <tony.nixon@ENG.MONASH.EDU.AU>:

> Jai Dhar wrote:
>
> > Tony, what is bell wire, and what is the purpose of putting it in the
> corner of
> > the boards?
>
> If you use my method of placing the board copper side down and let
> gravity pull the etched copper off the board (quite fast in fact), then
> you need a way of holding the board off the bottom of the tank. Bell
> wire is same as telephone wire - single strand insulated copper. Thread
> this through a hole in each corner of the PCB and twist it tight to make
> little PCB stand offs. Have one longer than the others so it sticks out
> of the etchant. This makes it easy to pull the board out.
>
>
> > Basically, if I want to be cheap about this, all I need is some plastic
> > container, the etchant, and something to suspend the board?? The rest
> (heater,
> > pump) is just for convenience?
>
> Correct.
>
> Heater may help if ambient temp is very cold as this slows the etching
> down.
>
> You also need a Dalo pen or equivalent to draw the pattern. There are
> other methods of transferring artwork to the PCB. See the archives.
>
> --
> Best regards
>
> Tony
>
> mICros
> http://www.bubblesoftonline.com
> mailto:sales@bubblesoftonline.com
>
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