I actually tried this. It works ok but you do have to create your own library parts (not a big deal). A somewhat minor problem is that you wind up with a bigger footprint than through-hole. I did clip of all but about 50 mils of the flat part of the leg but it still is bigger. I also found it a bit tricky getting the legs to all sit exactly flat. SMT parts are very available and have a much smaller footprint so I didn't bother beyond one experiment. --- In Homebrew_PCBs@yahoogroups.com, John Johnson <johnatl@m...> wrote: > You know, I've been wondering why people drill holes at all. > How about SMDIP (Surface mount DIP) instead of SMT? > I.e. design your board so that the components mount on the > trace side of the board. To mount DIPs, bend the legs out 90 degrees > and solder it down like a surface mount device. You would have to adjust > the width between the rows of pads to account for the extra width. Using > Eagle's Offset Pads would probably do the trick. You can also surface > mount normal, visible, passive components. Drill holes for connectors > and things that need physical strength. You could probably do double > sided boards like this, even with components on both sides. > Drilling the vias, of course. > > Regards, > JJ > > On Wednesday, Mar 24, 2004, at 10:01 US/Eastern, mr_gees100_peas wrote: > > > > > Hi I've ben reading this group for a while and I feel confident > > enough to make my firt PCB. I decided to use the PnP transfer paper > > and iron it on. Right now I manage to transfer my design to a copper > > bard fairly well. The thing is that I see all those holes and they > > are so smal. I hear some people drill the holes after they etch > > becase they can use the hole as a guide. Well, I tried driling a few > > holes in a practice pice of copper board nd I keep missing the mark. > > The board an't een etch yet but I wondering if I should drill the > > holes fist that way I can add more resist in case I screw up. > > > > My second question is about sharpie pen. When I was transfering my > > desing a few pads and trces did not transfer properly. I took a > > sharpie pen and fille in the missing gap. Will the sharpie resist > > ferric cloride or will it fail? > > > > > > > > Be sure to visit the group home and check for new Bookmarks and files: > > http://groups.yahoo.com/group/Homebrew_PCBs > > Yahoo! Groups Links > > > > > > > > > >
Message
Re: to drill or not to dril?
2004-03-25 by Phil
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