Re: [Discuss-gnuradio] USRP / Laptop Road case?

[Ian Buckley]

Dave, I've built a few systems like this using Pelican case's or cheaper knock 
off's.
Rather than go for a "side-by-side layout" which is hard to accommodate in 
common Peli case sizes, I buried the gel cells and USRP deep in the foam under 
the laptop. By making the USRP fit snuggly in the foam I was able to build an 
effective plenum using the USRP's built in fan so that not only did the USRP 
get sufficient air, but the gel cells and laptop underside received forced 
airflow, with exhaust and intake air returned to the surface of the open case 
via some carbon fiber pipe off cut's I had handy. Standard auto shop stuff was 
best to build the high current wiring and source switches for ON/OFF/CHARGE 
selection, and I recall sourcing a decent weather proof connector for the 
charging from Western Marine which got silicone sealed into the one hole I cut 
in the case. These were all used in applications that used small antenna's, so 
I mounted an SMA on a foot or so of thin coax directly to a custom bracket I 
fabricated and attached inside the lid so it was approx vertical when the lid 
was open. In all case's the laptop was never charged by the gel cell's, they 
only ran the USRP which I recall gave a fairly balanced run time for the system 
as a whole.
I'm afraid I didn't take pictures of any of these builds.
-Ian


On Sep 23, 2012, at 5:44 PM, davek <address@hidden> wrote:

> im searching for a heavy duty road case to house my laptop and B100
> for portable use.
> Optionally would like to stick some gel cells in there while away from AC 
> power.
> I am thinking putting the laptop and  usrp side be side on the top
> with batterys underneath, or laptop on top, usrp / battery under.
> Laptop pulls 20V, USRP 6V. Probably need to create a custom power
> supply / charging circuit?
> I checked the pelican line. the 1600 series looks like it might work..
> Has anyone ventured into a project like this? If so i would like to
> see case / construction pics.
> thanks
> dave
> 
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