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Cadsoft Eagle - My trial run #2 — Parallax Forums

Cadsoft Eagle - My trial run #2

SN96SN96 Posts: 318
edited 2005-09-21 21:41 in General Discussion
Hello, guys.
·
I wanted to share with you all my second trial board. This time I used CAPs and Resistors that I had not linked to the library.
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Things I learned this time around:
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1.) How to resize traces after they have been routed.
2.) Practice drawing silk screen frames around components.
3.) Focused more on circuit design and routing of traces.
4.) Figured out how to use the smash feature. I had to move some overlapping text.
·
Below ·is the image of that practice board I did

Mike
LED_Flasher.GIF
1477 x 1126 - 85K

Comments

  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-09-21 15:56
    Looking good, you're quickly picking this up. One issue I see is the widened blue trace from the power connector to LED1 OUT makes contact with the other power pad and the switch, this will cause a short. Have you figured out the DRC feature yet? Issues like unintended shorts will be reveiled in DRC. To use DRC you have to give parameters supplied by the fab house such as min spacing, you can goto Advanded Circuits for thier values or Sparkfun for theirs. If I remember correctly, most houses can do 8 mil spacing without bumping up the cost (AC I think provides 5 mil spacing at no extra cost).

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    ·1+1=10
  • SN96SN96 Posts: 318
    edited 2005-09-21 16:28
    I saw that after I posted the image. When I made the wire wider, I was so excited about my new discovery that I failed to see the shorts. You·have a very good eye for small details Paul, thanks for pointing that out! I have moved the wire over and that is now fixed. I ran DRC and the only error besides the two shorts that are now fixed, are the mounding holes for the two LED connectors. The hole closest to the pads comes up with a dimension error, but no mater how lose I make the tolerance, it still fails? I can't seem to figure this one out.
    ·
    Mike
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-09-21 18:19
    Are you refering to the mounting hole near the pads for X1 and X2? I think the reason for the error is the pads encroach on the exclusion area of the mounting hole, when an exclusion area exists (as shown by the lack of floodfill around the hole) no traces can be present within the boundry, or the DRC throws an error. A pad is considered as a top and bottom level trace with no solder masking. Are X1 and X2 (pads, mounting holes, silk screen) a component you got from an existing library, a library component you created, or a hodgepodge of individual elements you layed on the board? If it is a hodgepodge, change the pad type from the rounded rectangle to a small pad as used for the resistors (or any other pad shape that will not pass the exclusion border). If it is from a library (pre-canned or your own), you'll have to do the same thing by editing the component in the library editor.

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    ·1+1=10

    Post Edited (Paul Baker) : 9/21/2005 6:18:15 PM GMT
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-09-21 18:29
    Oh and another thing, I made this error on the board I showed you. Creating a hole in Eagle does not specify the drilling to actually occur, you also have to specify a location and size in the drill layer. I dont think your mounting holes for the LED connectors have a drill specified, this will result in the top and bottom copper layers making room for the hole, but the drill isn't directed to actually drill the hole. This happened to the switch on the upper right of the SX-Key header on my board, the result was I didnt have guide holes for the switch and I had to file down the guide posts on the switch so it would lay flush on the board to be soldered.

    Im not sure I am correct in this asessment of your board, its hard to verify this without being able to turn layers on an off, I just thought Id give you a heads up since it was a mistake I made.

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    ·1+1=10

    Post Edited (Paul Baker) : 9/21/2005 6:28:36 PM GMT
  • SN96SN96 Posts: 318
    edited 2005-09-21 20:18
    As always, thanks for your input. I have been busy at work so I was not able to check out your pointers. The X1 & X2 were taken directly from the library that came with the installation.

    What the heck is a hodgepodge?

    I will post a copy of my board so you can flip through the layers if you want. If not, that’s ok also.

    Mike
  • SN96SN96 Posts: 318
    edited 2005-09-21 20:27
    I forgot, I started over and made a new one (I messed up and had to). This new board has different connectors and there are no errors at all. I also looked a circuit on the Internet to make sure my memory was correct with the design of the two LED flashers. I had to change the way I had my caps were hooked up an all is good now.

    If you want, you can check out my .brd file

    Oh, and by the way, I am going to be busy the next few days to prepare for this hurricane. I live on the out skirts of Houston Texas and should be ok, but wish me luck. I'm going to make an effort to save the computer and all my electronic stuff and ditch the rest... smilewinkgrin.gif

    Post Edited (RoboROOKIE) : 9/21/2005 8:33:03 PM GMT
    brd
    brd
    LEDflasher.brd
    14K
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-09-21 21:41
    hodge·podge ··pron.jpg ([font=verdana,]·P·[/font])··Pronunciation Key··(hobreve.gifjprime.gifpobreve.gifjlprime.gif)
    n. A mixture of dissimilar ingredients; a jumble.·A motley assortment of things [noparse][[/noparse]syn: odds and ends, oddments, melange, farrago, ragbag, mishmash, mingle-mangle, hotchpotch, omnium-gatherum]

    Good luck and God speed with Rita, Im a Florida native and experienced quite a few in my life. You may have noticed my avatar is a hurricane, and my login name is coriolis (the·force·that causes hurricanes to spin in their counter-clockwise direction in the northern hemisphere). I had the nickname Hurricane Paul when I was much younger for my tendancy to leave areas I played·in a disaster.

    Last year was difficult on my family (my parents, I am presently located in VA), if you draw the path of Hurricanes Charlie and Frances across Florida, their paths intersect within 10 miles of my parent's home. When I went home for Christmas nearly half of the homes had blue tarpolins covering a portion of the roof, and a good 10% had no roof at all.

    I firmly believe that we can expect these Cat 4 and 5 storms to become more of the rule rather than the exception, thanks to global warming's effect on the Gulf's surface temperature. It looks like our only reprise from this will be when the 30 year cycle swings back to fewer hurricanes per year, but that still doesn't effect the intensity of storms that do develop.

    PS Ill look over your file when I get home.

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    ·1+1=10
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