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Layout week finale

A project log for CC3200MOD Breakout

Creating a breakout board for the TI CC3200MOD WIFI micro controller.

Jackson KeatingJackson Keating 02/13/2015 at 07:055 Comments

This layout week has ended in success. I just submitted the board to OSH Park.

After having a majority of the work done last night, this evening was a breeze. That said, I did not review the design. I'm hoping that with a simple board it won't be necessary.

The last step was submitting the paste layer for the stencil to OSH Stencils. When I was first designing the breakout board I stumbled across a really strange issue. I was trying to size the landing pads for the GND heat sink pins underneath the CC3200MOD. I tried to use the paste layer to size my footprint, but soon found out that the paste layer for the heat sinking GND pins was significantly smaller than the pins themselves. BUT WHY!? Enter The Spark Gap Podcast with their life saving episode on Design for Manufacture (DFM) that I was literally listening to this morning for the first time. Turns out, if there is too much solder paste on these pins, the reflow process can cause the chip to lift off of the PCB and prevent quality connections to the solder paste on the other pins. So, with confidence, I reduced the size of the solder paste layer for those pins specifically. There was so much great information on that episode. I've posted a link if you want to check it out.

Spark Gap Postcast - 26 - Design for Manufacturing

Thanks to the podcast I was able to submit to OSH Stencil tonight.

And there it is. Now I'm just waiting patiently for the parts to come in. This may also be the right time to attempt putting together a programming procedure.

Discussions

kartik_ghantasala wrote 07/19/2016 at 16:28 point

Hey jackson

Did you try flashing CC3200MOD launchpad board with CP2102?

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Bob wrote 02/24/2015 at 21:56 point

Great! I have a couple of modules and your board may be just the thing to use them.  I look forward to see how it goes.

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Jackson Keating wrote 02/24/2015 at 23:56 point

Good to hear!  I'll be sure to keep you up to date.

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Bob wrote 02/24/2015 at 16:23 point

Have you had a chance to test the new boards out?

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Jackson Keating wrote 02/24/2015 at 17:17 point

Not yet.  They just shipped out and arrive on Thursday.  I'm hoping to assemble and test them this weekend.

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