[arm-allstar] A simplified USB FOB modification

[Doug Crompton]

Well to answer your two points.  The link on the site for the FOB is not potted. It is the one shown in the photos. As far as soldering is concerned there are only two potentially tricky connections to the pins of the CM108 but as I pointed out if you use the right size wire and tack it on it is not a big deal. You might be surprised how easy it is. At $3 each sacrifice one to experiment and maybe it won't even be a sacrifice! The rest of the components you can mount or build anyway you desire. It is shown in a DB25 shell but that is certainly not a requirement. At first I was going to put a little perf board in there but then realized that most of the components could be mounted right of the connector. 
73 Doug
WA3DSP
http://www.crompton.com/hamradio


Date: Wed, 24 Jun 2015 11:44:16 -0600
From: mike at mtweb.net
To: arm-allstar at hamvoip.org
Subject: Re: [arm-allstar] A simplified USB FOB modification


  
    
  
  
    On 6/24/2015 3:42 AM, Corey Dean wrote:

    
    
      
      One of the Main reasons I was looking for this in acid and
        now the pi2 is due to the blob.  Some of us ordered a bunch just
        to find you could't get to the chip to modify it.

        

        Corey N3FE
      

        On Jun 24, 2015, at 2:11 AM, Doug Crompton <doug at crompton.com>
        wrote:

        

      
      
        
          
          I often get requests for GPIO
              control of COS and PTT on the BBB and RPi2. While we are
              going to have that capability in the next release at least
              for the RPi2 I often wonder why the great desire to do
              this and what the problem is with just modifying the FOB.
              No matter where the I/O control comes from you still have
              to build a minimal interface for the signals. Having it
              all come from one place, the FOB, has several advantages.
              One is you can use the code as it is now, the other is is
              you are not tying up I/O on the main board and running
              wires from two different places.

              

              In our testing I have built and tested it both ways GPIO 
              from the RPi2 or the FOB and I honestly think it is easier
              to just modify the FOB. I have written an article showing
              an easy way to modify the FOB that I think most hams who
              have soldering and small construction experience could
              handle. It saves you about $70/node to do this and a
              couple of hours of your time. The article is in the how-to
              section at hamvoip.org 

              

              Here is a direct link to it -

              

               http://crompton.com/hamradio/usb_fob_simple_modification/

            

            So give it a
              try. You certainly don't have much to lose at about $3.50
              in single quantities!

            

            I would be glad to
              answer any questions you may have about this project.

            

            73 Doug

              WA3DSP

              http://www.crompton.com/hamradio

             
        
      
      
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          Visit the BBB web page - http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
      
      

      
      

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Visit the BBB web page - http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
    
    For me, it is my eye site, isn't as good as it use to be and
    everything has gotten way to small.

    Just finished up building a controller and had to use a 5x
    magnifier.  At least when you bread board stuff you can space things
    2 microns further apart than half an atom:)

    I think most hams are older now.  I don't see the younger crowd
    getting in to the hobby, sad to say.  So size of stuff is more
    important to me now.  As I wont tackle a project that requires a lot
    of smt components.

    Mike

  


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