In this example I am using groff with a custom postscript
circuitslib library I created
to draw simple circuits with groff. You have to download it separately. I am
also using grap (the -G flag) preprocessor to draw the graphs you see in the
pdf.
The Makefile is very simple, it converts all jpgs to eps (filetype
that groff supports) using imagemagic(convert) and then uses groff to create a
postscript file that finally is passed to ps2pdf to generate the pdf file.