Very, very nice work DJ!
What I suggested is slightly different to achieve the same result.
It looks like you used a thin double sided center board with a single-sided
board added on each side to get the 4 copper layers.
I was suggesting to use two double-sided boards with extra insulation in the
center.
Again, excellent work!
Bertho
========================
From: DJ Delorie Sent: Thursday, January 05, 2012 00:04
"Boman33" <
boman33@... <mailto:boman33%40vinland.com> > writes:
> Actually this can easily be taken up another notch: A 4-Layer board.
I have already done that :-)
http://www.delorie.com/electronics/usb-gpio/The yellow-green board about the middle is a home-made 4 layer board.
http://www.delorie.com/electronics/sdram/The yellow-green board at the bottom is one of four layers for another
home-made 4 layer board.
I did just what you said, too - pre-drilled larger holes on the outer
layers so I could manually solder to the inner layers beneath them.
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