What am I doing wrong here?

Community PCB Design
1

Hi there,

I wanted to create copper pour on top layer and connect all the GNDs to this copper pour. But the autrouter does not complete it. What am I doing wrong? I would appreciate your help. Thanks

Schematic:

[

Board:

[](http://allyoucanupload.webshots.com/v/2006265577133127095)](http://allyoucanupload.webshots.com/v/2006252308801602940)

2

Assuming you are using Eagle, use the filled polygon (not the rectangle) to create the ground plane. Then you need to name it GND. Then when you click the Ratsnet button, it should automatically connect the appropriate pins. Other possibility is that the wire size for the ground plane is too large (preventing it connecting to narrow pads), though that does not appear to be the case here.

3

Vraz:
Assuming you are using Eagle, use the filled polygon (not the rectangle) to create the ground plane. Then you need to name it GND. Then when you click the Ratsnet button, it should automatically connect the appropriate pins. Other possibility is that the wire size for the ground plane is too large (preventing it connecting to narrow pads), though that does not appear to be the case here.

Thanks for response. I tried. It did not work. I named the polygon GND, removed a switch, and I tried without copper pour. It did not work.

4

Hi there,

I managed to make a copper pour area. But it is not connected to the ground. The GND of the IC is connected to the -ve part of the power supply. How can I connect the -ve part of the power supply to the coppoer pour area and then connect the GND of the IC to the copper pour area instead of directly to the -ve power supply?

I wanted to upload the EAGLE files but do not know how. If possible let me know. Thank

Schematic:

[<LINK_TEXT text=“http://aycu39.webshots.com/image/46318/ … 964_th.jpg”>http://aycu39.webshots.com/image/46318/2002216799912588964_th.jpg</LINK_TEXT>

Board:

[<LINK_TEXT text=“http://aycu39.webshots.com/image/46318/ … 127_th.jpg”>http://aycu39.webshots.com/image/46318/2002256111604904127_th.jpg</LINK_TEXT>](http://allyoucanupload.webshots.com/v/2002256111604904127)](http://allyoucanupload.webshots.com/v/2002216799912588964)

5

Hi there,

I just remembered the adivce of the previous gentleman and renamed the polygon to GND. It seems to work. The IC ground pin is connected to copper pour and also the -ve of the power supply to the copper pour. Thus the GND of IC is connected to -ve power supply but not directly. This is what I wanted. Now my question is

To ground any other things I can connect them to the the copper pour, right? Thanks

[<LINK_TEXT text=“http://aycu21.webshots.com/image/43900/ … 889_th.jpg”>http://aycu21.webshots.com/image/43900/2004198964050982889_th.jpg</LINK_TEXT>](http://allyoucanupload.webshots.com/v/2004198964050982889)

6

To ground any other things I can connect them to the the copper pour, right?

Its not so much that you connect them to the copper pour, but that the pads are named GND. Any pads named GND which are placed on the polygon named GND will be automatically connected. The connections themselves are made on your schematic when you connect pins to ground.
7

Vraz:

To ground any other things I can connect them to the the copper pour, right?

Its not so much that you connect them to the copper pour, but that the pads are named GND. Any pads named GND which are placed on the polygon named GND will be automatically connected. The connections themselves are made on your schematic when you connect pins to ground.

Thanks a lot Vraz. I found your responses very helpful. I appreciate it.