Jim,

Couple of caveats:

In Schematic, if the pins of your schematic symbol are not drawn on the
correct grid, you can try and try to hook a wire to it, but your wire will
not connect.  Start with Eagle's standard parts, they are all drawn on the
same default grid.

You definitely need to use the "Net Wire" tool instead of the "Wire" tool.
 THe "wire" tool actually draws lines, not connections.  Slightly
mis-named, IMHO.

After you wire up a part in schematic, click the "move" tool and move it
around.  When you do, and it is drawn correctly, your wires will rubber
band around with the part.  Hit the escape key and it snaps back in place.
 If your wires don't rubber band with the part, then you've made a mistake
and need to erase them and start over.  This is the cause of the "wire
overlaps pin" error - a wire is placed very close but not on top of a pin
because the part is drawn with a 0.0999" grid and the schematic is set to
a 0.1000" grid.

Be careful about changing the grid in Schematic.  Leave it at defaults.

I had these same problems early in my Eagle career, and 90% of them
stemmed from messing around with grid spacings and/or drawing my own
symbols without the default grid turned on, when I didn't know what I was
doing.  Once something is drawn off the grid it is difficult to get it
back aligned without erasing it altogether.

--Lawrence







Jim Tellier <jimtellier@COX.NET>
Sent by: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
06/15/2004 11:01 AM
Please respond to pic microcontroller discussion list


        To:     PICLIST@MITVMA.MIT.EDU
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        Subject:        [EE:]Help with Eagle


Hi all,
   I'm trying to use Eagle for the first time, and am somewhat perplexed;
I draw a schematic, use the "net wire" tool to connect pins from part to
part, including VCC and VSS supply pins.  When I ERC the schematic, I get
errors like "no pins on net N$11", and "wire overlaps pin xxx", etc. If I
switch to the "board" view, most of the connections I've made in the
schematic just don't show up.    I must be doing something *basically*
wrong, but I guess I need to be hit over the head in order to see it!!!!
If anyone wants to take a look at the .sch, please email me offline. (It's
not big, but I don't want to post it publicly).
Thanks for any ideas!!!
jim

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