Hello,

I am creating a pcb board on eagle for a Texas Instruments boost converter and I am experimenting with the polygon feature. Through research on the web I have leaned how to create a ground plane throughout the board. However, I have some questions that I just cant seem to find the answers to online. My first question would be, do I have to connect the ground of my battery to the ground plane of my board? If so, how would I go about doing that? Secondly, if I connected my grounds to vias would that automatically pass through to the ground plane or no? I experimented with vias and the ground plane on my previous model and was not able to get it right. If you could please help me that would be great. I am sorry if these questions are stupid but I have no prior experience in electronics and am teaching myself as I go.

Thanks,
John

 

@johnmillz1323
When you draw the polygon, Eagle will assign it a new net name like N$31. Just use the NAME command or button from the toolbar to rename it to GND or whatever you want.

Vias work the same way. Note when you put them inside the polygon, they won't be connected. Rename their net and they will.

Good luck and welcome to AAC!

 

@johnmillz1323
When you draw the polygon, Eagle will assign it a new net name like N$31. Just use the NAME command or button from the toolbar to rename it to GND or whatever you want.

Vias work the same way. Note when you put them inside the polygon, they won't be connected. Rename their net and they will.

Good luck and welcome to AAC!

Thank you very much, it is a refreshing to see an actual decent person respond to questions like this. I appreciate it.

 

Yeah, polys are pretty easy to handle in eagle.

You might also want to play around with the rank attribute. This will allow you to use multiple polygons in a layout, particularly useful in switcher designs. Rank can be 1 through 6. If a two polygons overlap, the lower rank one takes precedence.