"awakephd" <
a_wake@...> writes:
> The patterns have two inner blocks and traces of the designated size
> and spacing spiraling outward to two outer blocks.
I have bigger patterns like this here:
http://www.delorie.com/pcb/spirals/ > Now for some questions: 1) The PC board turned a chocolate brown
> color after heating on the hot plate.
Hot plates keep getting hotter and hotter. I found that I ∗can't∗ use
the hotplate for a second board unless I let it cool completely first,
else the board burns (charred epoxy!).