PCBs for Navigation/Locomotion/Base (or whatever) Layer  

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stven
(@stven)
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Joined: 2 months ago
Posts: 49
01/08/2019 6:26 pm  

Here are the footprints I used for the 20mm fusesholders:
Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open

For 30mm fuses I would have used:
Fuseholder_Cylinder-6.3x32mm_Schurter_0031-8002_Horizontal_Open

The footprint for the pads that hold the bullet connectors is:
MountingHole_4.5mm_Pad

This is a perfect fit.

And the bullet connectors I used are these (from Amazon):
https://www.amazon.com/gp/product/B071PDF297/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

The only challenge I had for footprints was the USB A connector. The only one I found used SMT pads, but all I needed to do with it was change the pad type to through-hole, and that turned out to be an easy thing to do. All the footprints I used were in the library that came with KiCad.

Steve

 


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stven
(@stven)
Eminent Member
Joined: 2 months ago
Posts: 49
01/08/2019 7:11 pm  

I uploaded my KICAD project for the Power Distribution board on github at:

https://github.com/stvenmobile/KICAD_DB1_CIRCUITS

Happy to hear any feedback if anyone takes a look at it. 

This board is a great first KiCad project since the overall design is really simple. One thing I would do differently in future is not accept the basic auto-routing that goes so close to other connectors and force a little more distance between traces and other pads by manually controlling the routes a bit.

stven


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Robo Pi
(@robo-pi)
Honorable Member
Joined: 2 months ago
Posts: 509
01/08/2019 7:18 pm  

I'm in the very slow process of downloading and installing KiCad on one of my computers.  If the download and install prove to be successful I'll definitely take a look at your files. 😀 

DroneBot Workshop Robotics Engineer
James


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codecage
(@codecage)
Member Moderator
Joined: 2 months ago
Posts: 165
01/08/2019 10:54 pm  

@stven

Interestingly enough I had actually bought those exact items earlier.  The description lists them as 3.5mm and the mounting whole you used was 4.5mm.  I would have thought that would have been too big of a hole, but your assembled board looks just fine.

I'm now wondering if the fuse holders I bought would have worked with the footprints you used.  I'll admit I didn't find those, so I got the experience of creating my own new footprint.  It worked out just fine.

SteveG


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byron
(@byron)
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Joined: 2 months ago
Posts: 56
01/08/2019 11:51 pm  

@Stven

Thanks for sharing your KICAD files.  When I loaded the project into my KICAD the schematic was blank and the PCB does not look right.

Screenshot 2019 08 01 at 23.04.45

It does not look the same as your pic, where have the ground traces gone!  I run KICAD on my mac and I had to change the background of the PCB from black to white or my drawings were not clearly visible I wonder if is was something to do with my colours.    I've only just got passed the the first noddy design from the KIKAD like a Pro so Im still very much a noob.   Your PCB looks good especially in the 3d view and it something I aspire to, but much more learning for me that for sure.


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stven
(@stven)
Eminent Member
Joined: 2 months ago
Posts: 49
02/08/2019 1:01 am  

@byron

On right side panel click on Layers, it looks like you are missing some layers like F CU. In the layers manager on the right side only the layers that are checked will be visible (like FCU, BCU, etc). This allows you to remove some noise whgile you are working on one particular layer....

 

Steve


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Robo Pi
(@robo-pi)
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Posts: 509
02/08/2019 1:02 am  

@Stven

I got KiCAD up and running.  I downloaded your files.   The PCB looks great.  And it especially looks nice in the 3D viewer.   Like @byron when I opened the schematic it was empty.  But I'm figuring this is because there are basically no components on this board save for the fuse holders.   So I'm guessing there is no schematic for it? 

DroneBot Workshop Robotics Engineer
James


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stven
(@stven)
Eminent Member
Joined: 2 months ago
Posts: 49
02/08/2019 1:15 am  

@robo-pi

No, there is a schemnatic, it is the DB1 Power Distribution.sch file.

FYI.. the reason you aren't seeing all the layers is most likely you do not have them all checked in the layers manager on the right. There is a drop down in the menu at the top of the interface that controls the layer you are currently working on, and there is a layers manager in the right side panel where you check each of the layers you want to be visible at the presnt time.

To view the schematic you need to open the schematic layout editor tool. In 3d viewer the terminl blocks don't showe up. I guess the default program doesn't have 3d views of every possible component.

If you start by opening the .pro file (project), you should have access to everything from the main panel.

 

Steve


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stven
(@stven)
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Joined: 2 months ago
Posts: 49
02/08/2019 1:42 am  

And I see you are correct, the schematic was empty. Please replace the original with the new file I just uploaded to github: DB1 Power Distribution.sch

That should fix it.


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Robo Pi
(@robo-pi)
Honorable Member
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Posts: 509
02/08/2019 4:28 am  
Posted by: @stven

Please replace the original with the new file I just uploaded to github: DB1 Power Distribution.sch

Thanks, I'll do that.

In the meantime I've been playing around with KiCAD a bit myself.  I started a new project with a blank Arduino UNO shield.  That's nice.  It provides me with a board that already has the header pins installed.  I looked at it in 3D view and it looks nice..   And it also provides a nice starter schematic with the header pins already wired up and labeled.

So this is a nice start for my ESP8266-01 custom Arduino UNO Shield. 

So this is good.  KiCAD looks like it's going to be easy to use.  

DroneBot Workshop Robotics Engineer
James


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codecage
(@codecage)
Member Moderator
Joined: 2 months ago
Posts: 165
02/08/2019 10:16 am  

@byron

If the picture you embedded in your post is what you're seeing, and I'm going assume it is, then what you are seeing is the copper fill on the bottom layer copper.  In the PNG embedded below click the button at the bottom of the picture.  This turns off the "fill zones."  To see them again, click the 'green' button just above the one that turns the fill zones off.

Fill Zone

SteveG


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byron
(@byron)
Trusted Member
Joined: 2 months ago
Posts: 56
02/08/2019 12:05 pm  

@codecage

Thanks for the information, you are spot on, the 'Do not show filled area in zones' button cleared the green copper fill and showed all the wiring.   You save me a few hours of head scratching thats for sure. 


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stven
(@stven)
Eminent Member
Joined: 2 months ago
Posts: 49
02/08/2019 4:07 pm  

@codecage

4.5mm (about 3/16") is the diameter of the outer ring of the jack. The inner hole for the jack is 3.5mm as best I can tell. I crossed fingers when I ordered, and then measured with a caliper before setting the footprint. I also verified the jack does fit the motor leads. This particular jack has a slight ridge so that it stops at that ridge when you insert from the bottom of the mounting pad, and it is a perfect fit using a 4.5mm drill hole. It soldered very nicely, the solder flowed around the entire ring of the mounting pad for a very stabvle mount.

I figured the ground plane was a good idea, and no reason not to do it since the entire bottom side is all negative traces anyway... He did something similar in the power supply example in the book, so I followed that lead.


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codecage
(@codecage)
Member Moderator
Joined: 2 months ago
Posts: 165
02/08/2019 5:55 pm  

@stven

Good deal.  And I agree on the ground plane fill. I've done that on the 3 boards I've built, and will do it on the Project #3 of the KiCAD Like a Pro book.

SteveG


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