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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