How to make a track on the PCB surface?
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crustn 3 weeks ago
Hi, hopefully simple question, how can I create a copper track on the top surface to be like a smd pad? See the following PCB layout [https://easyeda\.com/editor\#id=\|6b68269a51054544ae71b2170adc3e5a](https://easyeda.com/editor#id=|6b68269a51054544ae71b2170adc3e5a) Thanks and kind regards, Stefan
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andyfierman 3 weeks ago
"...how can I create a copper track on the top surface to be like a smd pad?" Don't really understand the question. If you want a track then draw it using the Track Tool. If you want a pad then create it using the Pad Tool. For future reference, please post the url of the whole project not just the individual file: [https://easyeda.com/crustn/d-command-erweiterung](https://easyeda.com/crustn/d-command-erweiterung) From your project it looks as though you are designing a PCB directly in the PCB Editor. Whilst that is possible in EasyEDA, please note that this is not the recommended design flow. If you are following the Design Flow recommended in the Tutorial and designing a PCB from a schematic, please read the cautions about placing pads directly into a PCB without having a symbol in the schematic with that footprint assigned to it, as described in (2.2) and (4) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)
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crustn 3 weeks ago
> If you want a pad then create it using the Pad Tool. Sorry for the confusion, let me clarify. If want sort of a pad, but not a through hole pad, nor a rectangular or round smd pad. It should be something like this.![image](https://cdn.shopify.com/s/files/1/0915/1182/products/1616-05_2048x.jpg?v=1506363243) I know it would be safer to draw a schematic first. But this design is so simple with one Teensy and 8 buttons and 8 LEDs that the PCB design should do the trick. Thanks, Stefan
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andyfierman 3 weeks ago
Do you post about these daisy wheel pads in the last couple of weeks? I'm sure I've seen these shapes before and answered the question but I can't find the post in the forum... The answer is that you can make pads any arbitrary shape using the polygon option: ![image.png](//image.easyeda.com/pullimage/dxvMcrWVrqedHzXTllnjx3fYLQafFzC7AmNkRHvP.png) and/or by overlapping pads with the same pin numbers. This post (which isn't the one I am thinking of but covers the same question) explains: [https://easyeda.com/forum/topic/Creating-footprint-for-rubber-keys-3429af6ff6e8479491a6342e75c71bba](https://easyeda.com/forum/topic/Creating-footprint-for-rubber-keys-3429af6ff6e8479491a6342e75c71bba)
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andyfierman 3 weeks ago
See also: [https://easyeda.com/forum/topic/How-to-avoid-DRC-errors-when-connecting-to-PCB-Footprints-a-k-a-PCB-Libs-90bf944fe3644b21a7d27a9e9d8df8d6](https://easyeda.com/forum/topic/How-to-avoid-DRC-errors-when-connecting-to-PCB-Footprints-a-k-a-PCB-Libs-90bf944fe3644b21a7d27a9e9d8df8d6)
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crustn 3 weeks ago
Hi Andy, thanks for the links. I want to build the same thing as Kerry Wong in the first link. Creating those footprints with polygon pads would be a tedious task and building these with connected rectangular pads seems a bit odd as well. I just had a try with the tracks on the top layer of the footprint (or PCB library). When drawing a track on the top layer, there is a the track property option called "expose copper". When I click on this and place the footprint on my test PCB, the Photo View looks correct and I can see the tracks exposed like pads. When I toggle between Gold and Silver Surface Finish, the tracks follows correctly. In 3D view however, it looks fine as well, but when toggling between Gold and Silver, the tracks stays Gold. Is this only a 3D view bug or is that not the appropriate way to do this? BTW I didn't post anything about that the last couple of weeks. Seems to be somebody else and of course I searched the forum before posting my question but didn't find anything appropriate ;-) cheers, Stefan
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andyfierman 3 weeks ago
If you make a PCB Footprint in the PCB Lib Editor using tracks then when you place it on the pcb, you will get DRC errors when you try to connect a track to it. You could just draw it directly in the PCB using tracks then use the Group/Ungroup tool to copy and paste it. Or simply copy and paste it.
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crustn 2 weeks ago
Hi Andy, sorry a bit late but thanks for your help. In the end I changed the layout so there are only pads and no tracks to avoid DRC errors. cheers, Stefan
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andreasbernhofer 1 week ago
The tracks will stay golden in 3D preview because that's actually the copper color shown, not the HASL/ENIG finish. However in Production all exposed copper will have HASL/ENIG finish. I noticed this myself on some designs where I exposed some copper.
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