Hi there,

I'm currently building a Persitance Of Vision LED flasher. I posted a
month or so ago to find info about ways of powering it, and have now
moved onto the next step (for anyone interested, I decided on a
transformer, as per Olin and Dave Tweed's suggestions).

Now, I've moved onto the next step and finally got round to etching my
first PCB. After much research, I eventually settled upon toner
transfer using magazine paper and etching with Sodium Persulfate,
since my money is rather short :)

A few pictures are available here:
http://aeonflame.com/electronics/pcb.html

Here's a few questions, if that's okay...

Firstly, as you may be able to see in the first picture, I had to draw
round some of the pads with a marker pen, since until I'd already
transferred the toner, I didn't realise that the pads were too small.
I am using Eagle Light, and I cannot appear to find anywhere to
override the default pad sizes on things like resistors. They all
appear to have 0.25-0.5mm or so width, whereas 1.5-2mm would be better
for me. Any idea how to do this, is it even possible?

Secondly, now I have some unused etchant, what would be the best way
to reheat it? Just put it in a bowl of boiling water for 10 minutes or
so, like I did while etching to keep it warm? Also, in the UK once
spent, does anyone know of the correct regulations of disposing of it?

Finally, if anyone has any comments on ways that I could have laid out
the PCB better, or how to make things even easier, that would be
fantastic!

Thanks,
Jamie.

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