On Mon, 30 May 2005, Olin Lathrop wrote:

> I've never tried doing a single sided board with Eagle.  I guess your method
> uses the second layer to have Eagle tell you where the jumpers need to be.
> However, I see a problem when using thru hole parts.  Eagle will assume the
> holes are plated and connect to both layers.  That will not be valid in
> cases when the pins under a component on the top side are inaccessible.
> Somehow you need Eagle to think that thru hole pads only connect to the
> bottom layer, but I don't know how to do that short of defining new packages
> in the libraries.

Actually you use keepouts under the parts and pretty strong bias against 
anything non-vertical on the top layer and Eagle will get it right most 
of the time (with some help). The 'vias' will simply be promoted to pads 
where the wire bridges are soldered.

With some coaxing Eagle can make pretty good single sided boards like 
that.

Peter
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