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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.

  • in reply to Former Member

    On 11/20/2011 12:44 PM, Robert Scott Jr wrote:

    Thank You Gentleman for your time and advice. Your comments are exactly the leads I (and other beginners) need to go off and learn how to more successfully use Eagle. I will take all your suggestions and start over. The ground and supply I chose from the library as the best I could find. I'm gonna have to do some poking around and see if there is a way to take certain common, frequently used, frequently used by me, etc. components and create my own library from them to avoid spending so much time trying to figure out where components are in th default library. - Scotty

     

     

    Yes...finding parts it the libraries can be puzzling at first.

    Different people have different methods but I find the following steps

    will often get me to what I need or close...

     

    - First search on a portion of the device name.   Try to use wildcards

    to make the search term reasonable specific but not exact.   Eg use

    "LS04  instead of "SN74LS04".   This will avoid the case where two

    manufacturers add a different prefix code to what is essentially the

    same part.   If you find what you need then use it....but definitely

    verify the pinout and package footprint against the datasheet to be sure

    that its right.   ( You could also check on download section of the

    cadsoft website to see if there are some libraries there that might have

    what you want).

     

    - If you can't find something close then search for the package in an

    existing library.   Again use the wildcards in the search term, "SOIC

    to find all the SOIC packages.    If you find something with the right

    package then copy that package to a custom library of your own.   This

    way you have 1/2 the work done and all you need to do is create the

    symbol and device.   Again...check to make sure that the package

    footprint you found is exactly what the datasheet recommends....if not

    you can edit it to agree.

     

    - If neither of the previous steps fails then its time to create your

    own part.    This can be daunting the first time or two but after you've

    created a few devices it becomes pretty routine and it doesn't take that

    long unless your part has lots of pins/pads.   There are some excellent

    video tutorials on-line about how to use the library editor.

     

    Have fun w/ Eagle

     

    Jim