On Mon, Nov 26, 2007 at 02:51:45AM -0500, DJ Delorie wrote: > > (FTDI232R) ... > mini-B connector has an extra pin, and ground is on pin 5 instead of > pin 4 like all other USB connectors.
Ok, now you've got me ohming out my mini-B connectors... > This board also used the global > puller, as I was able to coerce it to give me useful results. Do you have pics of that? I'd like to see what a board meant for the global puller comes out looking like. > The DIP adapter is a two-layer board. However, I did it using two > separate SS boards, taped together. This lets me line up the two > etched boards after etching, instead of before etching. When I etch two-layer boards I line up the two transfer papers and make a "pocket" for the board. You can use a light table or just a strong lamp. > The USB board is a home-etched four layer board. Yes, four. Ok, you've GOT to put up pics of that. > The tricky part is the vias. What I ended up doing is drilling big > holes in the outer layers before taping them on, then drilling small > holes through the full stack. I considered this once, but decided it was too crazy. Now since you're obviously crazy, it's just a matter of time before you email the list with the subject "home hole-wall activation and through-hole plating"! > Plus, it would have > gone better if I could have had different size copper (or no copper) > on different layers based on connectivity. Most PCB packages allow you to specify different clerances for inner vs surface layers. > I had to print each layer separately, I always export to PS and end up hand-stitching the PS together and then converting to PDF. With a few tweaks to the PS exporter, this could be automated. [btw, you got me thinking about my current 4 layer board and what it would be like to etch at home -- just did a drill report and I have 482 15mil vias...] -- Ben Jackson AD7GD <[EMAIL PROTECTED]> http://www.ben.com/ _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user