Is a 2-layer board layout possible?

You may wish to post a jpg image of it too (helps people reading this site from a mobile device, or those who are not running EAGLE on their current computer).

Daniel Dobrosky <noreply-178531@element14.com> wrote:

Schematic:

https://dl.dropbox.com/s/y8nm9584hz4x33h/Schematic.sch?token_hash=AAFU_Rq0QFE4vWGsSKgAa5PnrlJ3iauYhSaMfxp1HpdA-A&dl=1

I've tried several board layouts, but unfortunately the autorouter has

only reached 67%. I'd love it if someone could come up with a successful

layout, but either way I am in need of tips on how to arrange a board

that the autorouter can handle.

Route by hand. It's not taht hard .

--

Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt

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Tel. 06151 162516 -

Fax. 06151 164321 -

Image of schematic: https://www.dropbox.com/s/o6p5b2vr4zk7hd9/SchematicImage.png

Image of preliminary board layout: https://www.dropbox.com/s/h8xbk6w6xwpputr/LayoutImage.png

You say hand-routing isn't that hard... is ther a method I can follow to minimize trial and error (i.e. "route power lines first" or something like that)?

On 05/04/2013 16:12, Daniel Dobrosky wrote:

Image of schematic:

https://www.dropbox.com/s/o6p5b2vr4zk7hd9/SchematicImage.png

Image of preliminary board layout:

https://www.dropbox.com/s/h8xbk6w6xwpputr/LayoutImage.png

 

You say hand-routing isn't that hard... is ther a method I can follow to

minimize trial and error (i.e. "route power lines first" or something

like that)?

 

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To view any images and attachments in this post, visit:

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As example .brd file zipped, 100% routed with Freerouter, 39 via's (not

cleaned up). But I think the schematic you put on dropbox was missing a

connector.

Apologies, I sneakily updated the .sch a little while after I posted the image files. How did you get freerouter to work with eagle?

https://www.dropbox.com/s/ri00610jbq5q9j0/BoardFINAL.png

Here it is, though the DRC failed merely due to the pin spacing on the LPC2138FBD64/01,15LPC2138FBD64/01,15. Maybe it will pass the BatchPCB DRC...

Hand-routed, by the way (as if you couldn't tell).

aaaaaand, https://www.dropbox.com/s/nm2zpfq66rnis9c/FINAL.png

IT PASSED. Thanks all for the help.

There is are several ULPs (just wrote a new one) to generate the DSN

input file for Freerouter. After routing in generates a script to update

the BRD file. Look in the Freerouting forum on its website.

Autorouting smartness / capabilities is very impressive.

http://www.freerouting.net/index.php?page=description

Robert

On 05/04/2013 18:57, Daniel Dobrosky wrote:

Apologies, I sneakily updated the .sch a little while after I posted the

image files. How did you get freerouter to work with eagle?

 

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For something this small, I personally wouldn't use the autorouter at all

As a general rule, route as much as you can on one layer, and only when you can't route anymore go to the second layer. Also, avoid 90˚ bends, 45˚ just looks better!

Just for reference, here's a board I routed almost completely by hand - once you get the hang of it, it's actually fun!