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Re: to drill or not to dril?

2004-03-25 by Phil

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
> >
> >
> >
> >
> >

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