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Creating Libraries in Eagle

 

Library Editor Screenshot:

When you first open a library in eagle a blank library editor window appears.  So the first thing you do is select whether you are adding/editing a device, package, or symbol.

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Package Editor Screenshot:

Information on Breadboard Spacing:

This information is useful when you're developping a package which could be placed on a breadboard.  (I.E. dip packages, misc passives which you want your own package for, etc.)

Each hole is .1" apart and each drill hole size is .032" in diameter

 

Symbol Editor Screenshot:

Image accidently deleted... coming soon.

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Device Editor Screenshot:

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Prefix - By default in eagle a device has a prefix of U$ while you're editing your device change this to U so your parts are labeled U1, U2, etc rather then U$1, U$2... Note: you don't have to make it U make it something appropriate to what your device is... (i.e. R for resitor, L for inductor, etc)