Author Topic: (new to PCB design) VGA connector footprints driving me crazy  (Read 2000 times)

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Offline NeywinyTopic starter

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Hello,

TL;DR I don't think the footprint I downloaded looks right, need more gold standards to compare against.

I made a PCB in EasyEDA but a higher power wanted it done in KiCad so I did it in KiCad. In EasyEDA I could pull the footprint and 3D model from the selector thing from LCSC and it was fine. But for KiCad, I picked out https://www.digikey.com/en/products/detail/amphenol-icc-fci/ICD15S13E4GV00LF/1536418 and got the UltraLibrarian stuff. Go to put the 3D model I found in, and it only lines up upside down. I looked at my Basys3 boar, and it has the middle row shifted to the left if you look at it like this:

(connector)
(first row)
(second row to the left)
(third row)
(PCB).

So I'm thinking "ok, must've spec'd an upside-down connector." Found a GitHub project with this board:

That's what I want. They go to the left. I look at the BOM... as far as I can tell it's the one I picked without the extended nut things.
https://www.digikey.com/en/products/detail/amphenol-icc-fci/ICD15S13E4GX00LF/1536501
The difference is GX vs GV, but the drawings say
Quote
GX->HARPOON+INSERT UNC 4.40+METAL BRACKET
...
UV->F.SCREW LOCK UNC 4.40+METAL BRACKET
So the GitHub picked the GX (pdf says nothing about GV, I have to assume it's the same as UV. I notice in the footprint of mine
https://app.ultralibrarian.com/details/7174734F-C5BA-11E9-AB3A-0A3560A4CCCC/Amphenol-ICC/ICD15S13E4GV00LF?ref=digikey
the pin 1 is in the top right. Whereas on the GitHub it's the bottom left. As if the footprint is rotated 180*, but the rest of the connector looks fine. I've been trying to find other footprints. I found this
https://app.ultralibrarian.com/details/FF5850C5-103E-11E9-AB3A-0A3560A4CCCC/TE-Connectivity/5177802-9?ref=digikey
and it's like what I'd expect, but it's a $14.62 connector, so... even if it is correct it's too much for a VGA connector.

I tried finding the one from LCSC (which is $0.36) and it's here http://en.connfly.group/product/xVkr=EusQssAN0gN=Aos=mU+UrVkR9kqEAN0gN0IWqcNB+A. Can't find the footprints/models even though they show up in EasyEDA. The PDF http://outer.connfly.group/static/upload/file/pdf/DS1038.pdf shows that bottom view again. Does this mean the UltraLibrarian footprint is upside-down? I am not confident in my "this looks wrong" detector  :bullshit: :bullshit: to be able to tell. If anyone has used VGA connectors recently, please help me out. I really don't want to find out I put it in the PCB upside-down.

Thank you.
 

Offline oPossum

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #1 on: March 22, 2021, 01:50:42 am »
Male and female have mirror image pinouts. Did you choose the proper gender?
 

Offline NeywinyTopic starter

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #2 on: March 22, 2021, 02:07:21 am »
That was one of my first thoughts. All the drawings show the male gender having the middle row shifted the other way. I told Digikey to show female and that's what popped up. But it's not my first day doing digikey searches (just first week on PCBs), so I double checked that because their search can be a bit off sometimes. And it is indeed female looking.

Here's the photo they provide:



And the 3D model I found has it as female as well.
 

Offline oPossum

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #3 on: March 22, 2021, 02:37:34 am »
I know this is correct for female VGA. Built and working.
 

Offline NeywinyTopic starter

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #4 on: March 22, 2021, 10:46:07 am »
Thank you. Not only for the VGA connector confirmation, but also I've been considering using that DAC and having a working schematic in a PCB view makes it look not as complicated as I'd thought.

Do you mind sharing which VGA connector you used?
 

Offline oPossum

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #5 on: March 23, 2021, 04:10:51 am »
https://www.digikey.com/en/products/detail/amphenol-icc-fci/ICD15S13E4GX00LF/1536501

That is the part I used. The footprint is quite common and there are many other parts that would work.
 

Offline NeywinyTopic starter

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #6 on: March 23, 2021, 01:10:04 pm »
So that's the part from the GitHub and the one very similar to what I picked. Interesting. I think unless I source from LCSC I'll use that one since it's pretty much the same price as what I picked before and frankly 10c or whatever the difference was is much better than needing to re-spin the whole board. I'm sure as I build up my internal repertoire of preferred parts I'll know enough to choose something different, but I just need something that works and isn't through the roof expensive.

Thank you.
 

Offline oPossum

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #7 on: March 24, 2021, 12:32:20 am »
I think all the parts you listed in the first post will work. Get at least one of each and then you will know for sure :)
 

Offline NeywinyTopic starter

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #8 on: March 31, 2021, 02:06:37 am »
(I should look into email notifications…)
Thanks. I'm on an already overstretched budget (on an EE project? crazy talk) but it's better to spend $4 on connectors vs new boards and needing the new connector anyway.
 

Offline javascripter

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #9 on: March 31, 2021, 04:36:41 pm »
looks like initial problem is pretty much solved, but I will give my advice anyway:
never trust, always measure footprints against the datasheet (I personally don't use ultralibrarian parts (or any downloaded parts) since it is so fast to make a footprint and that way I can make sure the pin one marking is sensible and I don't get parts with a bunch of nonsense (?) on layers I don't care about)


(I should look into email notifications…)
Thanks. I'm on an already overstretched budget (on an EE project? crazy talk) but it's better to spend $4 on connectors vs new boards and needing the new connector anyway.

if you have time and access to a printer get ahold of the components and print the gerber files on paper (make sure 1:1 size ratio) to check that everything fits fine before ordering the board
 

Offline NeywinyTopic starter

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Re: (new to PCB design) VGA connector footprints driving me crazy
« Reply #10 on: April 01, 2021, 12:05:17 am »
Always looking for more information, so by all means even though it's solved.

I think mostly my lack of desire to make footprints is that I wasn't too sure on the drawings of the connector either, which was why I couldn't tell definitively if I should trust that one or not.

if you have time and access to a printer get ahold of the components and print the gerber files on paper (make sure 1:1 size ratio) to check that everything fits fine before ordering the board
That seems like a really good idea, problem is as you mentioned it's conditional on having time to get ahold of the components and I don't have that. But I'm sure it'll be fine, maybe I'll order the safe connectors now along with the cheap ones I'm unsure of and then next time I do a board I'll be able to not need this whole discussion. I don't have any components at the moment save for a few through hole things from a few kits, so this will really bring my stock levels up. Should make future boards a lot easier. Thank you.
 


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