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Am I in the right direction?

icemanxp300
icemanxp300 over 6 years ago

Hi, so 3 years ago I managed to put together a very basic board. I am now working on something a bit more involved. Just wondering if what I am doing will work and I am confused on a few things as well.

 

First this board will not be perfectly rectangular it has notches in 2 corners and a few in the sides. I read that making a polygon and selecting cut-out will work in removing these unwanted areas. I used the miter option to round a few corners. I still have a few corners that need rounded but I cant do a polygon for those. Well they are part of the polygon I put in for what I want cut but the corner going to the pcb is what needs rounded. See bottom corners.

 

Second this board requires edge connectors which I drew in with wires. These are to be on both top and bottom in equal spots. I actually just copied the entire group and pasted up a bit higher and then changed them all to bottom and then lowered them in place and then adjusted them. The main thing I am not liking here is my components (header pins) I put in do not change sides when I view bottom. I understand it is showing me "the layers". However I really need these header pins to accurately show me what they will look like on the bottom w/those bottom edge pins. I need to connect wire traces from both sides of those header pins.

 

Some traces get routed from top side header pins to top edge connectors but most pins get routed from bottom side header pins to edge connectors. I used header pins because it was all I could find that matches the hole sizes for the parts I am using. The edge connectors will have to be gold plated as well.

 

Will I have to run wires from these components as a bottom side looking at the components in reverse?

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Top Replies

  • dougw
    dougw over 6 years ago +2
    What CAD software are you using? Normally you would make connections and route traces on the bottom in a different color so you can tell which side the traces are on, but the routing is done from the top…
  • autodeskguest
    autodeskguest over 6 years ago +1
    Gregory Sprague wrote: <[...] First this board will not be perfectly rectangular it has notches in 2 corners and a few in the sides. I read that making a polygon and selecting cut-out will work in removing…
Parents
  • icemanxp300
    icemanxp300 over 6 years ago

    Ok so trying not have a huge quote. I will try and address everyone who is helping me. First off thanks for the dimension as opposed to polygons. It still took me a few minutes to figure it out. There is no "line" tool and when you draw a wire it only gives you the option for top or bottom. I then realized you can select dimension layer for wire ONLY BEFORE you draw the wire and then it is a line. I have deleted the polygons and drew in a new border using miter for edges that needed rounded and I used an arc in one spot that need a full radius.

     

     

    A few more replies I am using Eagle Cad Light 7.4.0. I tried upgrading to 9 but it kept giving me errors for missing library files after downloading a couple I gave up on it and just used what I had. I fully intend on sending this out to get produced.

     

     

    As far as an edge connector I had looked in that con-pc.lbr. before I even used the wires and nothing seemed to work. The wire width of .032 is perfect for what I need and the longer ones start at .05 and go to .35. The shorter ones start at .1 and end at .35. They have a center spacing of .059.

     

     

    I actually have the engineering blueprints giving me most the specs for this board. I just have very little experience with Eagle and zero training or education. It is all based off what I can teach myself. I just downloaded Eagle and started watching youtube videos and reading forums. So this is why I don't have a good grip on even the basics.

     

    I am not done with the board. I still need to run many traces from the header pins to the edge connectors. Is there a reason why this wire method as edge connectors will not work? Are these edge connectors not just thicker wire traces? The engineering blueprints for this board specifies that the Gold Plate contacts 5u" Gold  min over 50u" Nickel Min. Would it make a big difference If I did gold over copper? Since the wires are copper?

     

     

    This board basically has two sides the top and bottom. It has 4 spots for capacitors (only 2 get used so the other 2 are kind of not even needed), 1 42 pin eprom, and 1 8 pin microchip which I used the header pins to create holes for, again I could not find any parts library that matched the size and spacing as the header pins. The header pins match all these parts spacing perfectly. I will be ordering unpopulated boards.

     

     

    The image I showed did show top and bottom layers, the only thing that will be on bottom layer is edge connectors and they were hidden under the top red layer edge connectors. In that pic I showed you can see some slight blue peeking down in a few spots.

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  • autodeskguest
    autodeskguest over 6 years ago in reply to icemanxp300

    On 21/12/18 14:20, Gregory Sprague wrote:

    This board basically has two sides the top and bottom. It has 4 spots for capacitors (only 2 get used so the other 2 are kind of not even needed), 1 42 pin eprom, and 1 8 pin microchip which I used the header pins to create holes for, again I could not find any parts library that matched the size and spacing as the header pins. The header pins match all these parts spacing perfectly. I will be ordering unpopulated boards.

     

    And I say again, this is where you're going wrong.

     

    Do you have a schematic for this board? If not, WHY NOT? You cannot

    design a board unless you know what you're designing, and the schematic

    is your definition of that. Without it, you're just doodling aimlessly.

     

    Your schematic is going to include the components you're placing - four

    capacitors, a PIC, an EPROM - and will not contain any fakery with pin

    headers. You're being TOO F&$£&*G LAZY for your own good if you don't

    take the time to learn how to create proper library parts for the

    components you use.

     

    Once you have the schematic, with all the parts properly defined, your

    board will pretty much drop straight out. You must place the parts where

    you want them. You will then notice:

    - Eagle knows which pads need to be connected and shows "airwires"

    - All the components have silk screen markings

    - The silk screen includes pin 1 marks so that when you assemble it,

    you put things in the right way round

    - Eagle will tell you when you've drawn something wrong

     

    The time you save by having all this help more than makes up for the

    time you spend doing the schematic. Taking a shortcut just ends up

    wasting your time later on.

     

     

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Reply
  • autodeskguest
    autodeskguest over 6 years ago in reply to icemanxp300

    On 21/12/18 14:20, Gregory Sprague wrote:

    This board basically has two sides the top and bottom. It has 4 spots for capacitors (only 2 get used so the other 2 are kind of not even needed), 1 42 pin eprom, and 1 8 pin microchip which I used the header pins to create holes for, again I could not find any parts library that matched the size and spacing as the header pins. The header pins match all these parts spacing perfectly. I will be ordering unpopulated boards.

     

    And I say again, this is where you're going wrong.

     

    Do you have a schematic for this board? If not, WHY NOT? You cannot

    design a board unless you know what you're designing, and the schematic

    is your definition of that. Without it, you're just doodling aimlessly.

     

    Your schematic is going to include the components you're placing - four

    capacitors, a PIC, an EPROM - and will not contain any fakery with pin

    headers. You're being TOO F&$£&*G LAZY for your own good if you don't

    take the time to learn how to create proper library parts for the

    components you use.

     

    Once you have the schematic, with all the parts properly defined, your

    board will pretty much drop straight out. You must place the parts where

    you want them. You will then notice:

    - Eagle knows which pads need to be connected and shows "airwires"

    - All the components have silk screen markings

    - The silk screen includes pin 1 marks so that when you assemble it,

    you put things in the right way round

    - Eagle will tell you when you've drawn something wrong

     

    The time you save by having all this help more than makes up for the

    time you spend doing the schematic. Taking a shortcut just ends up

    wasting your time later on.

     

     

    • Cancel
    • Vote Up 0 Vote Down
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    • Cancel
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