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Editing a Schematic Symbol

autodeskguest

 

6/2/09

 

I have revivewed this forum and have already found

several helpful hints, so I know that you folks know what you

are doing.

 

I have oodles of experience with various CADD/Graphics

packages, but I am an absolute novice at using Eagle.

 

 

Here's my problem:

 

Does anyone here know how to edit a schematic symbol?

 

I have used Eagle (Freeware version)  to create a few microcontroller (MCU)

schematic symbols that I am using in several projects.

 

I want to create a simplified version of each symbol for

illustrative purposes.

 

For example, in some simplified schematic cases, I don't want to show

ALL of the MCU pins - just those in use at the time.

 

Suppose I have a symbol library, "MCU_x.lbr".

How do I delete one or more of the pins and

make a new copy, "MCU_x2.lbr"?

 

I have reviewed the User manual and all of the Help screens,

with no success.

 

Any help or pointers to a source of

help will be greatly aappreciated.

 

Thank you all very much.

 

Tom Lukers

 

 

 

Parents

  • On Tue, 2 Jun 2009 15:23:35 -0500, "Tom Lukers" <tlukers@tx.rr.com>

    wrote:

     

     

    Suppose I have a symbol library, "MCU_x.lbr".

    How do I delete one or more of the pins and

    make a new copy, "MCU_x2.lbr"?

     

    You would be using the library editor.  First make MCU_x2.lbr by

    copying MCU_x.lbr.  Then, from the control panel, open MCU_x2.lbr.

    You are now in the library editor.  In that program, you can edit

    Symbols, Packages, and Devices.  A Device is made up of schematic

    Symbols and PCB Packages.  The editor will not let you delete pins

    from a Symbol as long as that Symbol is still involved with a device.

    You could then delete the Device, then you can edit the Symbol any way

    you want, including deleting pins.  Now you can make a new device in

    which you Add this modified Symbol.  Now save the modified library.

    Now you can Add this new device to any schematic.  It will not connect

    to any PCB layout package, since you didn't add any packages.  It will

    be for schematic display and printing only.

     

     

    Robert Scott

    Real-Time Specialties

    Ypsilanti, Michigan

     

Reply

  • On Tue, 2 Jun 2009 15:23:35 -0500, "Tom Lukers" <tlukers@tx.rr.com>

    wrote:

     

     

    Suppose I have a symbol library, "MCU_x.lbr".

    How do I delete one or more of the pins and

    make a new copy, "MCU_x2.lbr"?

     

    You would be using the library editor.  First make MCU_x2.lbr by

    copying MCU_x.lbr.  Then, from the control panel, open MCU_x2.lbr.

    You are now in the library editor.  In that program, you can edit

    Symbols, Packages, and Devices.  A Device is made up of schematic

    Symbols and PCB Packages.  The editor will not let you delete pins

    from a Symbol as long as that Symbol is still involved with a device.

    You could then delete the Device, then you can edit the Symbol any way

    you want, including deleting pins.  Now you can make a new device in

    which you Add this modified Symbol.  Now save the modified library.

    Now you can Add this new device to any schematic.  It will not connect

    to any PCB layout package, since you didn't add any packages.  It will

    be for schematic display and printing only.

     

     

    Robert Scott

    Real-Time Specialties

    Ypsilanti, Michigan

     

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