My first PCB with Eagle

Discussion in 'General Electronics Chat' started by MrChips, Dec 3, 2012.

  1. MrChips

    Thread Starter Moderator

    Oct 2, 2009
    12,452
    3,371
    I finally finished my PCB layout with Eagle for my ARM Cortex M4-based VGA board and submitted the files for fabrication last night.

    Got a response back from the PCB house that it does not meet their design rules.
    Did a Design Rules Check (DRC) and sure enough, my traces off the chip were too close, even with 10 mil traces.

    Turns out I used an SQFP package (0.4 mm pitch) instead of an LQFP package (0.5mm pitch). I would have been pretty mad with myself if they had gone ahead and printed the boards.

    Thank goodness for DRC.
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,395
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    Glad you caught it. One thing I have come to trust is when getting parts for the breadboard make sure at least 1 of everything is left over. Then when I lay out the PCB I'll print it out one to one scale, and "populate" the paper PCB with the real parts.

    A microscope helps see everything is going to be all right.
     
  3. JohnInTX

    Moderator

    Jun 26, 2012
    2,348
    1,029
    Glad you found it. You might find these useful as well:

    FreeDFM.com will find these for you before submitting.
    GC-Prevue is a free Gerber viewer that lets you inspect your layers as they would be plotted.

    I do that too, especially on a new component.
     
    Last edited: Dec 3, 2012
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