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Topic: Eagle - Many package connections to one device pin? (Read 2 times) previous topic - next topic

Marvin Martian

Ah yes - append what I needed - screamingly obvious when you know!
Thanks

Marvin Martian

Spoke too soon - the Append isn't quite what I needed since Eagle will still run a ghost wire between the two pads and expect them to be connected with a trace, whereas they are electrically connected on the physical device, so the trace is unnecessary.

I looked at the @ option too but that seems to require a symbol pin for each connected pad. The example I have is a battery holder, so obviously I want a standard 2 pin battery symbol for the circuit...

kg4wsv

Quote
I looked at the @ option too but that seems to require a symbol pin for each connected pad. The example I have is a battery holder, so obviously I want a standard 2 pin battery symbol for the circuit...

I think you call the one on the symbol GND, but it will want all of the GND@X pins connected on the PCB.

You don't have to connect all of the pins to the device, so you can have GND, GND2, and + pins on the package, but only have GND and + on the device.  This would leave you with a permanently isolated pad on the board (so you have mechanical mounting) but no electrical connection.

For example, here's a coin cell battery holder from the Sparkfun eagle library that has a large SMT pad for one side of the battery and two through-holes which are electrically connected on the battery holder, but only one of them is connected in the library device and the results is the electrically isolated through-hole.



Is that what you're after?

-j

Marvin Martian

Not quite - I want to be able to connect to either of the hole pads on a layout by layout basis, and want it to know that they are electrically connected/equivalent without having to connect them myself via PCB traces.

From looking at what Sparkfun have done, I think it's safe to assume I can't.

Chagrin

This is a common Eagle question, and no, it can't be done. Crossroads' advice is the way to go.

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