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DIP pins shorted

Former Member

Hello All. This is my first attempt at using Eagle software to develop a printed circuit board. This project is for the purpose of jumping into the program to gain a foothold on learning it's ways. I've come accross something that I don't understand so I've come asking for some help. As seen in the board image, IC1 (L297) is a DIP. It looks to me that pins on both sides of the chip are shorted to adjacent pins. Anyone have an idea of what's going on? Thanks. - Scotty

 

imageimage

 

Message was edited. Inserted new images in hopes of better resolution.

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  • On 11/18/2011 8:42 AM, Robert Scott Jr wrote:

    Hello All. This is my first attempt at using Eagle software to develop a printed circuit board. This project is for the purpose of jumping into the program to gain a foothold on learning it's ways. I've come accross something that I don't understand so I've come asking for some help. As seen in the board image, IC1 (L297) is a DIP. It looks to me that pins on both sides of the chip are shorted to adjacent pins. Anyone have an idea of what's going on? Thanks. - Scotty

     

      Image:L297 board.jpg  Image:L297 schematic.jpg

     

     

    The images are of pretty poor resolution so its hard to tell.    Some of

    the (non- adjacent) pins are shorted together but it appears that the

    schematic has the same connections.

     

    I do not see a case where "adjacent" pins are shorted.    You do

    understand that editor is showing you multiple layers?   The blue traces

    are on a different layer of the board than the red traces.   Although

    these traces do cross each other they are not electrically connected

    unless there is a via or pin also connecting the board layers.

     

    Why not use the "show" command to display the nets on your board.   This

    will quickly tell you if there are connections between adjacent pins.

     

    Jim

     

     

  • in reply to Former Member

    Thanks for responding Jim. I inserted some new images. They are readable now. Yes, I do understand about trace colors and board sides. When I use the Show tool on a selected 'problem' trace, the trace and only the intended component pins of the selected trace illuminate. However, that trace has a path right along the drill holes of adjacent pins of IC1.

  • in reply to Former Member

    Hi robert,

     

    First which version do you use and can you put in the sch and brd files so we can check for you.

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