Draw Electronic Schematics with CadSoft EAGLE

Step 4 Add Integrated Circuits

Let's search for our 555 timer. Lots of companies have manufactured the 555, and given it slightly different suffixes and prefixes. LM555N, SE555, TL555, NE555; all are pretty interchangable. If we search for just "555", there are several results; we can check the preview panel to see which one looks most appropriate. In this case, we'll use LM555N from the "linear" library.
(The string search in the add dialog will need wildcard designators around a substring, so you search for "*555*" to find all parts with a "555" in the name.)

You'll notice that the EAGLE part drawing doesn't look very much like the 555 drawing on the schematics we're trying to enter, the pins are in different places, and have funny names attached as well as pin numbers. And it's not like the pin layout matches the actual package shape either. We'll have to be careful when making our connections.

Comments

[jimby]

When I tried to search I would get no results. It seems in version 5 at least, you have to load the libraries you want first, otherwise you will not find any components.

If you type 'use *' in the command box at the top it will load them all.

[westfw]

I've had it act like that; but usually it behaves as though "use *" is the default.  I don't know if that's because it's "sticky" somewhere, or because of some previous configuration, or what.

Remembering that you might need to issue the "use *" is a good idea.

[nz]

To search for 555 you must type *555* rather than 555 into the add dialog (which you should have opened in the previous step).
Typing only 555 will yield no results, though on my version of eagle running an unsuccessful search will at least return some help on how to use the wildcards to correctly widen your search.

[westfw]

added some text on wildcards...