USRPs are incredibly handy devices, they let us play all over the spectrum with the signal processing algorithms and software of the day. The USRP B210 was an awesome step in practicality requiring only USB3 for I/O and power, minimizing the number of cables required to haul around. However, it’s size and chunky case options have been a source of frustration. It’s a nice thing to always keep with you, but when packing bags and conserving space, it just can’t always make the cut.
The Ettus Research USRP B200 Mini recently changed all that by releasing a very compact version of the B200 which takes up virtually no space, but frustratingly doesn’t ship with a case to protect it from abuse! Carrying around padded electrostatic wrap bags isn’t particularly appealing or protective, so I set about to put together a functional case for the device that would at least protect it from physical abuse.
The top and bottom case renderings of the resulting design are shown below, about the size of a stack of business cards. As long as a GPS-DO isn’t needed, this is now pretty much the perfect compact carrying companion for GNU Radio.
The first print, on a pretty low end 3D printer is shown below. After a few tweaks, fitment around the SMA plugs is very tight, the board fitment into the case is snug otherwise, a bit of space was added around the USB port to allow various sized plugs to clear it.
For scale, we show it here next to a full size B210 + case. While much of the design of the underlying board is the same here, the size reduction, and more tightly fitted case, and resulting hauling size of this device step is pretty amazing!
The fit isn’t completely perfect, it could use a little bit more clearance in a few spots, but it shouldn’t be putting too much tension on any overly fragile areas, and seems like it could take quite a bit of beating. We’ll see how long this one survives!
For anyone interested in having one of these, the STL Case Models have been made available for purchase, or download on shapeways at https://www.shapeways.com/shops/osh
A bit more eye candy below …
Note: I would suggest using something like a #4-40 thread and 3/8″length screw size for securing this, see links below.