Can't resolve implicit power pin conflicts.

Hi Bill,

I think EAGLE doesn't care what the pin is named, just cares what the net is named. So, usually I just connect the pins as desired, and make sure the ground net is labelled something appropriate (e.g. 0V), supply is labelled 3V3 or similar, etc. EAGLE won't care if I connect 3V3 to VDD pins or VCC, etc.

As I understand, there is no way to give a net two names without a component in-between (e.g. a star ground point), which is really then two nets anyway. Sometimes I do want to give a different name for information purposes near a connector for example, but in that case I work around it by just making a text note on the schematic (e.g. something like "Vin" or "Supply_out" even if they are connected to the same net).

On 16/03/14 03:34, shabaz wrote:

I think EAGLE doesn't care what the pin is named, just cares what the

net is named. So, usually I just connect the pins as desired, and make

sure the ground net is labelled something appropriate (e.g. 0V), supply

is labelled 3V3 or similar, etc. EAGLE won't care if I connect 3V3 to

VDD pins or VCC, etc.

I don't think that's quite true. If the power pin is named "VDD" and you

connect it to a net called "3V3" then you get a warning in the ERC, but

the connections are made correctly as you intend.

If a component has a (hidden) pin marked as direction "power" and named

"VDD", and if you have a net named "VDD" (with a supply symbol on it),

and you leave that power pin uninvoked, then Eagle will automatically

connect it to the net. This behaviour is convenient if all your

components have the same power supply naming convention, but can be

overridden with explicit connections if not.

On 03/15/2014 11:06 PM, billpenner wrote:

How do I resolve the problem with implicit power pins not being allowed

to co exist. When different ICs  on the same project have differing

power/GND names. ie. GND and V- etc.Eagle will allow only one name when

connecting the signals.I have read many discussions with some indicating

that it can be turned off. Can someone please help? I am sure it must be

simple but I have not been able to solve.

Thanks.

Bill

Good morning, Bill,

Search this forum for a thread titled "Power and Supply Pin Use on

Schematics" originally posted on 30-Sep-2013 by David Kanazawa.  On

01-Oct-2013, I posted a rather lengthy response that included shorts.lbr

and how to use them, along with a screen shot of their use.

The following day, I posted an even lengthier commentary on why one

should or should not use shorts.

David found my responses as well as those of others very helpful.

I believe that you'll find the referenced thread will answer the "how"

and "why" of your question.

Enjoy,

    - Chuck

Thanks to everyone! What a great bunch

Using the information provided (invoke), I was able to display the power pins on the schematic. Then I could connect the pins as needed.

The pour worked fine and all the connections were as supposed to be. This process seems rather convoluted and counterintutive but since I am new to Eagle I shouldn't complain eh.

Thanks again

Bill