Thanks, very helpful. That seems like the correct interpretation of
their use of the word "swell".
-dave
DJ Delorie wrote:
Below a certain pitch, mask becomes almost useless, because the solder
will bride from pin to pin anyway. The challenge boards are 0.50m and
0.40mm pitch and neither ha
Below a certain pitch, mask becomes almost useless, because the solder
will bride from pin to pin anyway. The challenge boards are 0.50m and
0.40mm pitch and neither has mask between the pins. What seems to
work for me is to just glob on the solder, then go over it with a
desolder braid where ne
Here is the rule in question from PCBexpress web site:
Solder mask swell is at least .008 larger than copper surfaces to keep
mask off pads.
Am I interpreting that correctly? That I need .008 all around the
copper pad? Or is a mask .008 wider than the pad sufficient?
-dave
Dave N6NZ wrot
Thought I just saw a thread on this topic, but I deleted the whole works
and can't find it in the archives.
I'm trying to reconcile a data sheet for a TSSOP-20, 0.65mm lead pitch
package with PCBexpress's design rules. The problem: 26mil l.p. and
10mil pad width leaves 16mil btw pads. The ru
Olof,
you'll generally want symbols that match your footprints. the symbols
may be very specific, or very generic. In any event, you want the pins
on the symbol to coincide with the pins on the footprints. pin 1 needs
to match up with pin 1.
The symbols only need two attributes to go from
I am off for a few months. I don't want email piling up.
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Both refus
Thanks John, but how do I make these land patterns integrate with symbols I
create in gschem? And how do I make gsch2pcb recognize them when I want to
create a netlist?
Olof
- Original Message -
From: "John Luciani" <[EMAIL PROTECTED]>
To: "gEDA user mailing list"
Cc:
Sent: Saturda
On 10/21/06, Olof Tångrot <[EMAIL PROTECTED]> wrote:
HI there.
Where do I find the solution?
Regards Olof
I have a USB Type B connector at
http://www.luciani.org/geda/pcb/pcb-footprint-list.html#Connector
(* jcl *)
--
http://www.luciani.org
__
Harry Eaton wrote:
The new polygon clipping code will dice up any polygon that has holes
in it into smaller ones that don't have holes and they just touch,
they don't overlap.
I should clarify this statement. That is true of the Gerber output, but
not the other types of output, or screen dra
> A Hong Kong/Chinese board fabber, YukShing Circuits, sent me some
> FR-1
Not sure I want to hand-make that many precision boards.
If I were to product-ize it, I'd go with a larger single-sided board.
You still want the solder mask, I think, although it's hard to squeeze
it between the IC pins.
DJ Delorie wrote:
I'll give some feed back to that. I was planing on ordering ten.
Not that I'm that bad at soldering, but some people at work could use
some practice.
Note that ten packs aren't cut up; you'll need a scroll saw or other
pcb cutter with a narrow kerf. I use a #2 blade. I'm g
Dave N6NZ wrote:
In fooling with various practice layouts (partial layouts, actually) I
think I have the basics of polygons and rectangles sorted out. Now
I'm wondering about the practicalities is adjoining poly's.
Here is the situation: In my design, there wants to be a polygon patch
of an
> > FYI: They still throb too fast to see (30Hz). Those caps are not very
> > precise.
>
>U? What's their tolerance spec?
They're X5R's, rated at 10%.
That board is going about 700Hz+, so they're 5% off, but I've seen
them up to 20% off when measuring them with my multimeter, not
Dave McGuire wrote:
On Oct 20, 2006, at 8:26 PM, DJ Delorie wrote:
I wonder if you can hand-solder SOJ if you start by putting solder
paste on the pads, so that you use the tip to reflow the paste?
I've done this with a hot-air pencil. I find it a bit easier than
doing SOJs with an iron
HI there.
I saw in the list archive that I am not the only
one that fails making gsch2pcb to accept the CONN_USB
landpattern.
Is the problem the missing inc-file?
Has a problem been solved?
Where do I find the solution?
Regards Olof
___
ged
In fooling with various practice layouts (partial layouts, actually) I
think I have the basics of polygons and rectangles sorted out. Now I'm
wondering about the practicalities is adjoining poly's.
Here is the situation: In my design, there wants to be a polygon patch
of analog ground that wi
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