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New file uploaded to kicad-users

 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the kicad-users
group.

File : /Library/Symbols_DCDC-ACDC-Converter_RevC_20Jul2012.lib
Uploaded by : bernd.wiebus <bernd.wiebus@...>
Description : Symbols for KiCad. Some DCDC-Converters. Contains CINCON EC5BC12, CINCON EC6C11, TRACO TED-1212, TRACO TED-XXXX Dual Output, TRACO TED-XXXX Single Output, TRACO TEN10-1212, TRACO TEN10-XXXX, TRACO TME-XXXX, TRACO TMH-XXXX Single Output, TRACO TMH-XXXX Dual Output, BOTHHAND CF-Serie and DELTA DPS05U09D. Traco TMLM series ACDC-Converters. GNU-GPL. No Warranty for nothing. Suggestions are welcome to bernd.wiebus@...

You can access this file at the URL:


To learn more about file sharing for your group, please visit:

Regards,

bernd.wiebus <bernd.wiebus@...>


Re: Mounting holes missing solder mask opening

 

--- In kicad-users@..., "prenato_2000" <prenato_2000@...> wrote:

Here's the latest I heard from the pcb house:

"Since you have indicated that four holes are screw holes ,then the
solder mask opening is necessity .because if no solder mask opening
,the hole wall will be covered with solder .so we kindly propose you
could update the gerber file with 4 solder mask opening adding ."
I'm not sure if some information might have been lost in translation.

The only issue I can think of is this: Usually the boards are drilled before solder mask is applied. So if there are no openings in the mask, the mounting holes would be blocked by the mask.

Also we don't know (yet) if you have openings of the solder mask on BOTH layers. If just one layer is open, the hole will indeed fill up with solder when they do HASL.

Maybe that is the problem.

So you should check if you have the proper openings for the drill hole on both mask layers (top and bottom).

When creating the gerber files, make sure to create top and bottom solder mask layers + check if they 'open the hole' all the way. Maybe there is something wrong with the 1pin footprint of your kicad release. Can't be sure, but some footprints have bugs.


Re: Mounting holes missing solder mask opening

 

Here's the latest I heard from the pcb house:

"Since you have indicated that four holes are screw holes ,then the solder mask opening is necessity .because if no solder mask opening ,the hole wall will be covered with solder .so we kindly propose you could update the gerber file with 4 solder mask opening adding ."

I'm not sure what to do here. If anyone has a suggestion I would appreciate it.

Thanks,
P

--- In kicad-users@..., "prenato_2000" <prenato_2000@...> wrote:

Hi Esteban, Robert,
Sorry for the image issue. Here it is what I intended to post. Hopefully
will show now:
[layoutIssue]
http://xa.yimg.com/kq/groups/16027698/sn/1220508062/name/layoutIssue.jpg
I placed it under Photos -> Kicad_problems
The layer in blue contains the drill holes where the four large ones in
the four corners are the 1PIn screw holes. The green color is the solder
mask in the bottom layer. I have 5 SMD capacitors there and these are
the mask opening for those (I suppose). Given that the 1PIN are just
screw holes, I'm wondering why they would need a solder mask opening for
these holes? I'm probably missing something basic here since I'm new at
this.
Thanks in advance,P--- In kicad-users@..., "e_e_lucchesi"
<e_e_lucchesi@> wrote:

I forgot to tell you that I can't see the image (when I click your
message on Yahoo's page a dialog asking user name and password appears).

--- In kicad-users@..., "prenato_2000" prenato_2000@
wrote:

Hi Robert,
Thanks a lot for your feedback. Here's an image. The layer in blue
are
the drill holes where the four large ones in the four corners are
the
1PIn screw holes. The green color is the solder mask in the bottom
layer. I have 5 SMD capacitors there and these are the mask opening
for
those (I suppose). Given that the 1PIN are just screw holes, I'm
wondering why they would need a solder mask opening for these holes?
I'm
probably missing something basic here since I'm new at this.
Thanks in advance,P

--- In kicad-users@..., "robert" <madworm_de.yahoo@>
wrote:

"there are 4 drill size 3.0 mm that are missing solder mask
opening
,see the picture .we kindly propose you could update the gerber file
."

I used the 1PIN module in the pcb design tool to add these
holes.

I haven't had problems with "1pin" before. Did you check the
gerber
files with a gerber viewer? (gerbv is quite good). Can you post
them, or
at least the 'picture'?


Re: Mounting holes missing solder mask opening

 

Hi Esteban, Robert,

Sorry for the image issue. Here it is what I intended to post. Hopefully will show now:

layoutIssue

http://xa.yimg.com/kq/groups/16027698/sn/1220508062/name/layoutIssue.jpg

I placed it under Photos -> Kicad_problems

The layer in blue contains the drill holes where the four large ones ?in the four corners are the 1PIn screw holes. The green color is the solder mask in the bottom layer. I have 5 SMD capacitors there and these are the mask opening for those (I suppose).?
Given that the 1PIN are just screw holes, I'm wondering why they would need a solder mask opening for these holes? I'm probably missing something basic here since I'm new at this.

Thanks in advance,
P

--- In kicad-users@..., "e_e_lucchesi" wrote:
>
> I forgot to tell you that I can't see the image (when I click your message on Yahoo's page a dialog asking user name and password appears).
>
> --- In kicad-users@..., "prenato_2000" prenato_2000@ wrote:
> >
> > Hi Robert,
> > Thanks a lot for your feedback. Here's an image. The layer in blue are
> > the drill holes where the four large ones in the four corners are the
> > 1PIn screw holes. The green color is the solder mask in the bottom
> > layer. I have 5 SMD capacitors there and these are the mask opening for
> > those (I suppose). Given that the 1PIN are just screw holes, I'm
> > wondering why they would need a solder mask opening for these holes? I'm
> > probably missing something basic here since I'm new at this.
> > Thanks in advance,P
> >
> > --- In kicad-users@..., "robert"
> > wrote:
> > >
> > > > "there are 4 drill size 3.0 mm that are missing solder mask opening
> > ,see the picture .we kindly propose you could update the gerber file ."
> > > >
> > > > I used the 1PIN module in the pcb design tool to add these holes.
> > >
> > > I haven't had problems with "1pin" before. Did you check the gerber
> > files with a gerber viewer? (gerbv is quite good). Can you post them, or
> > at least the 'picture'?
> > >
> >
>


Re: Mounting holes missing solder mask opening

 

I forgot to tell you that I can't see the image (when I click your message on Yahoo's page a dialog asking user name and password appears).

--- In kicad-users@..., "prenato_2000" <prenato_2000@...> wrote:

Hi Robert,
Thanks a lot for your feedback. Here's an image. The layer in blue are
the drill holes where the four large ones in the four corners are the
1PIn screw holes. The green color is the solder mask in the bottom
layer. I have 5 SMD capacitors there and these are the mask opening for
those (I suppose). Given that the 1PIN are just screw holes, I'm
wondering why they would need a solder mask opening for these holes? I'm
probably missing something basic here since I'm new at this.
Thanks in advance,P

--- In kicad-users@..., "robert" <madworm_de.yahoo@>
wrote:

"there are 4 drill size 3.0 mm that are missing solder mask opening
,see the picture .we kindly propose you could update the gerber file ."

I used the 1PIN module in the pcb design tool to add these holes.
I haven't had problems with "1pin" before. Did you check the gerber
files with a gerber viewer? (gerbv is quite good). Can you post them, or
at least the 'picture'?


Re: Mounting holes missing solder mask opening

 

--- In kicad-users@..., "prenato_2000" <prenato_2000@...> wrote:

Hi Robert,
Thanks a lot for your feedback. Here's an image. The layer in blue are
the drill holes where the four large ones in the four corners are the
1PIn screw holes. The green color is the solder mask in the bottom
layer. I have 5 SMD capacitors there and these are the mask opening for
those (I suppose). Given that the 1PIN are just screw holes, I'm
wondering why they would need a solder mask opening for these holes? I'm
probably missing something basic here since I'm new at this.
Thanks in advance,P

--- In kicad-users@..., "robert" <madworm_de.yahoo@>
wrote:

"there are 4 drill size 3.0 mm that are missing solder mask opening
,see the picture .we kindly propose you could update the gerber file ."

I used the 1PIN module in the pcb design tool to add these holes.
I haven't had problems with "1pin" before. Did you check the gerber
files with a gerber viewer? (gerbv is quite good). Can you post them, or
at least the 'picture'?

Hello Renato,
By default, KiCad's through-hole pads don't have solder paste layers checked (I don't know why, and that's one of the reasons I never use modules from the standard libraries). Is it possible that this is a case of terminology, i.e., confusion between "solder paste mask" (the one through which solder paste goes) and "solder mask" (the one that stops solder)?
Best regards,
Esteban


Re: Mounting holes missing solder mask opening

 

"there are 4 drill size 3.0 mm that are missing solder mask opening ,see the picture .we kindly propose you could update the gerber file ."

I used the 1PIN module in the pcb design tool to add these holes.
I haven't had problems with "1pin" before. Did you check the gerber files with a gerber viewer? (gerbv is quite good). Can you post them, or at least the 'picture'?


Re: Multi sheet

Andy Eskelson
 

Never had problems folding the big drawings up from new, but like large
maps, getting them folded after you open them is always a pain
especially if someone else folded them first. :-)

It was a very common practice on production engineering drawings, they
usually came in an A4 wad which you then opened up. I've used them so
many times that it's not surprising that I prefer the large drawings.

Andy





On Sat, 21 Jul 2012 15:38:18 +0100
"JorgeF_Tech" <jorgef.tech@...> wrote:



Hi



Yes ;)

Big schematics in big sheets of paper with an A0 plotter available and a big
table around.

Then some serious amount of careful folding to make it fit the remaining
documentation, in a way that it can be unfolded without removing it from the
booklet.


Mounting holes missing solder mask opening

 

Hi

I'm new to pcb making and tried nding my first Kicad design to iteadstudios. They are reporting an issue with the mounting holes in my Gerbers:

"there are 4 drill size 3.0 mm that are missing solder mask opening ,see the picture .we kindly propose you could update the gerber file ."

I used the 1PIN module in the pcb design tool to add these holes. This is a two layer pcb and i placed this module in ecah of the four corners. Anyone has suggestion on what I might have done wrong and how to correct it?

Many thanks in advance,

Paulo


Re: Paste stencil "window pane" GND pad issue

 

Berwyn:

I was hoping somebody would chime in with an answer to your
question. Alas, it is not me. The only information I have
found for KiCAD support of large thermal pads is in the Files
folder of the kicad-users Yahoo group:



There might be other "tricks", but I am unaware of them. I am
hoping that one of the wonderful KiCAD developers is working
on this problem. I suspect that the .mod/.brd file format needs
some tweaking for better support of "thermal pads", but that is
pure speculation on my part.

If anybody else has some better suggestions, please let us know.

Regards,

-Wayne

--- In kicad-users@..., "berwynhoyt" <berwyn@...> wrote:

Hi folks,
I have components with a central large GND pad in the middle and
standard pin pads around the edges. The paste stencil for these has one
large GND pad sized opening for solder mask. Then it has several
smaller (no copper layer) pads overlaid on that to create a solder paste
stencil "window pane" grid (this is the recommended way
<> of applying solder
paste because if you use a single large paste pad, there is too much
solder in the middle.
This works find to generate a paste stencil grid for the large GND
plane. However, Freerouter will no longer open the .dsn file. In order
to get freerouter to open the .dsn file, I have to change the pads to be
copper-layer pads instead of no-copper-layer pads. But if I do that
then I get DRC errors "Pad near pad" for each of those pads (because
they're superimposed on the solder mask pad.
Is there a solution for this?
Thanks,Berwyn


Re: Multi sheet

JorgeF_Tech
 

¿ªÔÆÌåÓý

?

Hi

?

Yes ;)

Big schematics in big sheets of paper with an A0 plotter available and a big table around.

Then some serious amount of careful folding to make it fit the remaining documentation, in a way that it can be unfolded without removing it from the booklet.

?

A top sheet with placeholders for the others is not the only way, and probably not the best one. It isn¡¯t even a really hierarchy.

I usually use the hierarchical sheet system to mimic functionality.

My typical approach is to have a top sheet with the connectors to the outside world and, maybe, the power supply system and a placeholder (sub-sheet) for the remaining of it.

Then, one step down functional place-holders (sub-sheets) and the main signal and power distribution and buses.

Then, one step bellow, the electronics of the, above mentioned, functional placeholders (sub-sheets). And this ones will have as many sub-sheets as necessary to ?draw all of the electronics in an easy to read/locate way.

?

?

Sebastian, as a ¡°new user of Kicad¡±, bear in mind that your schematic can have as many sheets as you wish/need, but it is only one board (PCB).

Don¡¯t try to use hierarchical sheets to handle multiple PCBs, and then come here asking for a way to design multiple PCBs from one schematic and asking how to include the board to board connectors in it.

?

?

Best regards

Jorge

?

?

?

De: kicad-users@... [mailto:kicad-users@...] Em nome de Andy Eskelson
Enviada: quinta-feira, 19 de Julho
de 2012 00:15
Para: kicad-users@...
Assunto: Re: [kicad-users] Multi sheet

?

?


Personally I hate hierarchical sheets, I much prefer "large" drawings so
what I do is simply define a much bigger page size A3, A2, A0 or
whatever.

If you really need multiple sheets, the the way to treat this within the
existing kicad system is to just make a two level setup, with the top
level simply used as a placeholder for the other sheets. You can then use
the various connector labels between them. In other words you simply
forget the hierarchical nature of the top level.

Andy


On Wed, 18 Jul 2012 21:23:25 -0000
"sebastien.duvier" <sebastien.duvier@...> wrote:

> Hello all,
> I'm a new user of Kicad and I very astonished to discover all functionalities of this free software !
> The only thing that I'm concern is the multiple sheet schematic : it doesn't seem to be possible to have a multiple sheet without hierarchical way.
>
> Do you know if this improvement could be available in future release of Kicad ?
>
> regards
>
>
>
> ------------------------------------
>
> Please read the Kicad FAQ in the group files section before posting your question.
> Please post your bug reports here. They will be picked up by the creator of Kicad.
> Please visit for details of how to contribute your symbols/modules to the kicad library.
> For building Kicad from source and other development questions visit the kicad-devel group at ! Groups Links
>
>
>


Re: Multi sheet

Peter Bennett
 

On 7/18/2012 2:23 PM, sebastien.duvier wrote:
Hello all, I'm a new user of Kicad and I very astonished to discover
all functionalities of this free software ! The only thing that I'm
concern is the multiple sheet schematic : it doesn't seem to be
possible to have a multiple sheet without hierarchical way.

Do you know if this improvement could be available in future release
of Kicad ?

regards
It seems to me that if you have a multi-sheet schematic, you need some
way to show how those sheets are interconnected, both for KiCad and for
the user.

The most obvious way to show the connections between the sheets is to
have a "top-level" sheet as a sort of block diagram, with boxes
representing the individual sheets that show the actual schematic, and
wires between the blocks showing the interconnections. This does require some hierarchical capabilities.

How would you implement a multi-sheet schematic without using a "top-level" drawing?

--
Peter Bennett, VE7CEI Vancouver, B.C., Canada
GPS and NMEA info:
Vancouver Power Squadron:


Re: Multi sheet

Andy Eskelson
 

There are developer forums and the software repository, however the
developers do read the posts here so I expect that your comments have
already been picked up.

Andy





On Fri, 20 Jul 2012 08:33:45 -0000
"sebastien.duvier" <sebastien.duvier@...> wrote:

Hello Andy,
Thanks a lot for your reply.
Do you know if it could be considered for the next version of Kicad ?
I saw that I'm not alone to expect this feature...
where can I submit (if it's not already did) this improvement to developpers team ?

regards

--- In kicad-users@..., Andy Eskelson <andyyahoo@...> wrote:


Personally I hate hierarchical sheets, I much prefer "large" drawings so
what I do is simply define a much bigger page size A3, A2, A0 or
whatever.

If you really need multiple sheets, the the way to treat this within the
existing kicad system is to just make a two level setup, with the top
level simply used as a placeholder for the other sheets. You can then use
the various connector labels between them. In other words you simply
forget the hierarchical nature of the top level.


Andy





On Wed, 18 Jul 2012 21:23:25 -0000
"sebastien.duvier" <sebastien.duvier@...> wrote:

Hello all,
I'm a new user of Kicad and I very astonished to discover all functionalities of this free software !
The only thing that I'm concern is the multiple sheet schematic : it doesn't seem to be possible to have a multiple sheet without hierarchical way.

Do you know if this improvement could be available in future release of Kicad ?

regards



------------------------------------

Please read the Kicad FAQ in the group files section before posting your question.
Please post your bug reports here. They will be picked up by the creator of Kicad.
Please visit for details of how to contribute your symbols/modules to the kicad library.
For building Kicad from source and other development questions visit the kicad-devel group at ! Groups Links





------------------------------------

Please read the Kicad FAQ in the group files section before posting your question.
Please post your bug reports here. They will be picked up by the creator of Kicad.
Please visit for details of how to contribute your symbols/modules to the kicad library.
For building Kicad from source and other development questions visit the kicad-devel group at ! Groups Links



Re: internal autorouter

 

i was using autorouter to finalize board by completing the 'no brainer' traces. one of the problem was that it only used default trace with, not the one defined by netclass.?
once i mentioned that on launchpad, there was attempt to fix it but unfortunately it got a bit worse. last time i used it, it was trying to route with wider traces as defined in netclass. this should have worked ok but it didn't. the problem is that it was still thinking that it is using 0.008" trace so it was getting through tight spots - while lying down wider traces and creating tons of short circuits.?
i reported that as well but i was informed that built in router is depreciated and options are to either route manually or use freeroute. freeroute seem to work very well but i'm not fan of low contrast pastel colors...?

ik


From: Alain Mouette
To: kicad-users@...
Sent: Thursday, July 19, 2012 11:48:39 AM
Subject: Re: [kicad-users] internal autorouter

?

Em 19-07-2012 05:06, blindbox escreveu:
>
> I repeat, it's not very good. You're better off with Freerouter.

Auto router serves not only to make a fully routed PCB !!!

I use it a lot, running quick autoroutes and reversing to previous version.

What I gain with it? Well, it is a very good check for my component
placing. After a few fast iterations I can get a much better view of
routing problems and plece my components in a much better way

my 2?,
Alain



Re: Hi kicad outputs parts lists are their ways to connect that to a mouser and digi

 

google searching digikey databas lead me to some interesting results. octopart api was one of them so maby that and a linux mysql database and php might work.

--- In kicad-users@..., Andy Eskelson <andyyahoo@...> wrote:


It is highly unlikely that you will find such a list. Major distributors
will have a catalogue of 100's of thousands of parts.

The first problem is that Mouser and Digikey ARE NOT component
manufacturers they are distributors They will buy products from many
different manufacturers and resell them. They may sell them under their
own name or under the manufacturers name.

In a product, you will need to specify what you need. That could be
as simple as a generic JEDEC type, 2N3055 say, (even that has some
pitfalls) or it could be something more specialised.

In your stock control application you will specify where that part is
bought from, alternative suppliers, specific manufacturer and so on.

This is a job for a database app, and you could write one in Access or
whatever if you wanted to. It depends on what your particular needs are.
It could be as simple as a plain list, or something very complex that
maintains inventory, stock control, purchasing and so on, for that you
may well consider some high-end commercial application with an equally
high end price tag. Large companies spend a lot of time and money
maintaining their inventory and stock control systems, it's not simple
and it can be tedious.

A software package called "Parts and Vendors" has been mentioned here in
the past. Not something I've ever used, but it sounds reasonable.

The key point is that you cannot rely on a distributor to maintain such
a list year in year out.

It's your product / project so that's down to you to maintain the
components list/sources. I've had to deal with too many situations where
purchasing calls up and asks "xyz from dodgy-components-limited" is half
the price of what we currently use, can we switch to that....

One time when purchasing did the switch without asking things went
wrong, to be fair it was the JEDEC situation I mentioned above, and the
problem was very obscure. After the change the failure rate of a sub
assembly shot up. After a lot of investigation the difference turned
out to be a letter "H" that was (or in this case was not) stamped on
the case of the 2N3055. That "H" denotes that the construction was
Epitaxial rather than Planar - The epitaxial construction had a better
secondary breakdown voltage than the (much cheaper) planar
construction. It is highly unlikely that something like this would
ever be reflected in a distributors parts list.


Andy





On Thu, 19 Jul 2012 16:46:51 -0000
"josh_eeg" <josheeg@...> wrote:

Hi kicad outputs parts lists are their ways to connect that to a mouser and digikey parts lists?

What database spread sheets applications are avalable for making the manufacturers part numbers pad type like 603 smd or 805 stock sort by price sql option?

Can I pull in a xml or csv file that is mouser and digikey?



------------------------------------

Please read the Kicad FAQ in the group files section before posting your question.
Please post your bug reports here. They will be picked up by the creator of Kicad.
Please visit for details of how to contribute your symbols/modules to the kicad library.
For building Kicad from source and other development questions visit the kicad-devel group at ! Groups Links



Re: Multi sheet

 

Hello Andy,
Thanks a lot for your reply.
Do you know if it could be considered for the next version of Kicad ?
I saw that I'm not alone to expect this feature...
where can I submit (if it's not already did) this improvement to developpers team ?

regards

--- In kicad-users@..., Andy Eskelson <andyyahoo@...> wrote:


Personally I hate hierarchical sheets, I much prefer "large" drawings so
what I do is simply define a much bigger page size A3, A2, A0 or
whatever.

If you really need multiple sheets, the the way to treat this within the
existing kicad system is to just make a two level setup, with the top
level simply used as a placeholder for the other sheets. You can then use
the various connector labels between them. In other words you simply
forget the hierarchical nature of the top level.


Andy





On Wed, 18 Jul 2012 21:23:25 -0000
"sebastien.duvier" <sebastien.duvier@...> wrote:

Hello all,
I'm a new user of Kicad and I very astonished to discover all functionalities of this free software !
The only thing that I'm concern is the multiple sheet schematic : it doesn't seem to be possible to have a multiple sheet without hierarchical way.

Do you know if this improvement could be available in future release of Kicad ?

regards



------------------------------------

Please read the Kicad FAQ in the group files section before posting your question.
Please post your bug reports here. They will be picked up by the creator of Kicad.
Please visit for details of how to contribute your symbols/modules to the kicad library.
For building Kicad from source and other development questions visit the kicad-devel group at ! Groups Links



Re: internal autorouter

 

it seemed to work ok with a simple board, but i tried it on one of the demo boards which was low-medium complexity (carte_test.brd) and it crashed pcbnew... is there a log i can check to see what happened when the autorouter ran?

--- In kicad-users@..., blindbox <blind_box2@...> wrote:

The internal router is not that good compared to Freerouter. Also, to
use it, simply click autorouting mode (2nd from the very right on the
top icon list).
Then, right click anywhere on the grid (not on a module) > Autoroute >
Autoroute all modules.

I repeat, it's not very good. You're better off with Freerouter.


Re: internal autorouter

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 07/19/2012 11:39 AM, Mithat Konar wrote:
Will the trip into gEDA-PCB be one way, or will we be able to get
results back into KiCad?
For the first crack at it, it will be one way. You'll have to generate
your gerber files from geda pcb.

This is intended to be just a work-around while we're waiting to have
a workable qautorouter plugin.

- --Mike
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Re: Hi kicad outputs parts lists are their ways to connect that to a mouser and digi

Andy Eskelson
 

It is highly unlikely that you will find such a list. Major distributors
will have a catalogue of 100's of thousands of parts.

The first problem is that Mouser and Digikey ARE NOT component
manufacturers they are distributors They will buy products from many
different manufacturers and resell them. They may sell them under their
own name or under the manufacturers name.

In a product, you will need to specify what you need. That could be
as simple as a generic JEDEC type, 2N3055 say, (even that has some
pitfalls) or it could be something more specialised.

In your stock control application you will specify where that part is
bought from, alternative suppliers, specific manufacturer and so on.

This is a job for a database app, and you could write one in Access or
whatever if you wanted to. It depends on what your particular needs are.
It could be as simple as a plain list, or something very complex that
maintains inventory, stock control, purchasing and so on, for that you
may well consider some high-end commercial application with an equally
high end price tag. Large companies spend a lot of time and money
maintaining their inventory and stock control systems, it's not simple
and it can be tedious.

A software package called "Parts and Vendors" has been mentioned here in
the past. Not something I've ever used, but it sounds reasonable.

The key point is that you cannot rely on a distributor to maintain such
a list year in year out.

It's your product / project so that's down to you to maintain the
components list/sources. I've had to deal with too many situations where
purchasing calls up and asks "xyz from dodgy-components-limited" is half
the price of what we currently use, can we switch to that....

One time when purchasing did the switch without asking things went
wrong, to be fair it was the JEDEC situation I mentioned above, and the
problem was very obscure. After the change the failure rate of a sub
assembly shot up. After a lot of investigation the difference turned
out to be a letter "H" that was (or in this case was not) stamped on
the case of the 2N3055. That "H" denotes that the construction was
Epitaxial rather than Planar - The epitaxial construction had a better
secondary breakdown voltage than the (much cheaper) planar
construction. It is highly unlikely that something like this would
ever be reflected in a distributors parts list.


Andy





On Thu, 19 Jul 2012 16:46:51 -0000
"josh_eeg" <josheeg@...> wrote:

Hi kicad outputs parts lists are their ways to connect that to a mouser and digikey parts lists?

What database spread sheets applications are avalable for making the manufacturers part numbers pad type like 603 smd or 805 stock sort by price sql option?

Can I pull in a xml or csv file that is mouser and digikey?



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Re: Diodes in standard library - square pin??

 

--- In kicad-users@..., "shelmichaels" <yahooshel@...> wrote:

Hi...

I'm trying to get up to speed with KiCad, and it's going pretty well. 8^)

One thing that bothers me, though, is the footprint/module for diodes as presented in the standard library. In the library version that I got when installing KiCad just a few weeks ago, the anode is marked as pin 1, and the cathode as pin 2. Good. But, the square pin shape is on pin 2. Not good??

Doesn't this violate conventions on pin shapes? Isn't it always pin 1 that is supposed to get the square shape? Would I be painting myself into some kind of corner if I change all diode modules to have square shapes for pin 1?

Thanks for your time in looking at this.

Best regards,
...Shel

My advice, which applies to any EDA, is to largely ignore the libraries that come with it. When there is a part in the library that is worthwhile, export it to a new library and modify it to suit your preference. It won't take long before you have a nice set of libraries containing many parts that you actually use, without having to sift through thousands of random bits. Another advantage is that if you reinstall or upgrade KiCAD, it won't overwrite your changes as it will if you modify parts in the default library.

As for pad shapes, do it the way you prefer, it makes no real difference in the end as long as you are consistent. I generally use A and K rather than 1 and 2 because there are many diodes in various SMT packages that use other pin numbers.