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Beaglebone shield outline

dcdc

Hi all

 

I'm a newbie to this stuff, but have been watching lots of videos and blogs etc. I'm trying to design a cape for the beaglebone black, using the "beaglebone_shield" from the adafruit library. What I wasn't expecting is for the shield's outline to be cut out of the ground plane. Is that right or am I doing something wrong?

image

 

thanks,

Danny

  • 0

    On 18/07/14 10:29, Danny B wrote:

    Hi all

     

    I'm a newbie to this stuff, but have been watching lots of videos and

    blogs etc. I'm trying to design a cape for the beaglebone black, using

    the "beaglebone_shield" from the adafruit library. What I wasn't

    expecting is for the shield's outline to be cut out of the ground plane.

    Is that right or am I doing something wrong?

     

     

    I haven't used that library but my guess would be:

    - the "beaglebone shield" is intended for use as a template for

    designing shield boards

    - the outline of the shield board is therefore drawn in the dimension

    layer to be an outline

    - you are not designing a shield board but a "cape"

    - you therefore do not want the shield outline in your dimension layer

     

    In other words, what you are doing wrong is you are using a library part

    for a purpose other than what it was designed for.

     

    Your best bet, probably, is to copy the "beaglebone_shield" component

    (symbol, package and device) under a new name (say "beaglebone_holder")

    then modify this new part as follows:

    - change the symbol so that it looks like a holder, not a template

    - in the package, change the "layer" of the outline from dimension to tDocu

    - if the pin header is part of the device, replace the downward pins

    with upward sockets and vice-versa.

     

    HTH,

    Rob

     

     

  • 0 in reply to autodeskguest

    Thanks Rob, that's very helpful.

     

    I think I'll have a go at drawing out the position of the male pins to match the BBB to start with, and forget about the outline as I'm not worried about physical space for this one - it will be bigger than the BBB anyway.

     

    Danny

  • 0

    Hi Danny,

    I have created a BBB cape template schematic and board layout that I used to create a cape.

    The cape fits properly and works well. The holes actually line up properly despite how they look in the picture below. The template includes the standard cape EEPROM. I made the connector pads a bit smaller than some other templates so heavier traces could be routed between pads.

    The template is the same size as the BBB - not shortened to provide better access to buttons.

    If someone wants to explain the best way to publish this template project, I would consider making it available.

    The whole project will likely end up being published at some point.

    The project blog is here:

    Vehicle Simulator - VTR / RTR

     

    image