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VR Brain Micro 5.0 : yesterday start to delivery the pre order of VR Brain Micro . Now we are working on vrbrain wiki updates will be available in the next hours .

Dear Friends,

yesterday we start to delivery the VR Brain Micro 5 pre order. Thanks to all guys that join the preorder in last month . I think that the first user start to receive it in the next days . We are working to update the wiki with the updates for quick start FAQ for use our new board.

The info will be update in the next hours on : 

If you need support write down in this blog post.



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Comment by Stuart Brookes on July 4, 2014 at 8:17pm

What is the time line on the firmware that is selectable between ppm and sbus/sppm?

I am going to convert my quad into an x8, and I am currently using the custom ppm quad firmware.



Comment by Stuart Brookes on June 30, 2014 at 8:15pm

Thanks Emile,

That worked, for anyone interested my case if trying to do the same see here

I am happy with only current, I can run a separate audible voltage alarm for if I get a bad cell or something.

Thanks again,

Loving uBrain


Comment by emile on June 30, 2014 at 3:51pm

Stuart, check that in the full parameter list you have this for battery monitor:



If you want to test Current, then you have to invert BAT_CUR_PIN with BAT_VOLT_PIN

On the uBRAIN it is not  possible to test both at the same time unfortunately.

Let me know if it works.


I've corrected the defaults in the firmware so from next release it will be automatic.

Comment by Micha Heyerick on June 29, 2014 at 8:50pm
My Mbrain is also victim of the usb port braking off. Just received my D4R friday. Today after 5 minutes my usb port broke. No real force was put upon the cable. Very brittle apparently. What now? This sort of soldering work is beyond me and my tools.
Comment by Stuart Brookes on June 29, 2014 at 5:47pm
Thanks Roberto! :)
Comment by Roberto Navoni on June 29, 2014 at 4:57pm

Here the video so is more simple to see :) Good Job :) As first loiter it's very good.
Comment by Stuart Brookes on June 29, 2014 at 3:53pm


Yes will do, I have bought some USB micro connectorrs, my plan is to make a short lead onboard to make connection easier and means I don't need to plug/unplug on the PCB connector.

Here is a quick vid I took on my phone, sorry it is portrait....I was on my own so had my hands full.

Comment by Roberto Navoni on June 29, 2014 at 2:49pm

Great news Stuart :) 

Keep atention to your usb and improve mechanical fix so you can continue to happy without any kind of problem :) 

Send a video of your maiden fly that could be great :) 



Comment by Stuart Brookes on June 29, 2014 at 11:16am

I just successfully maidened my new homebrew big quad with my uBrain :)

Pretty much just loitered for 20 minutes x 2 to shake test it, my vibes are a bit high and I have a bit or torque from a motor misalignment, but looks good other than that. Loiter is the best I have had, and all gains are default at the minute :)

I have a question though, as before i ultimately would like the coltage input to be optioanly used for current, but in the mean time I wired up battery voltage. But I am getting zero volts in misison planner and logs. I tried the various input options in the settings, but all show 0V. Is this working in the current firmwares?



Comment by Stuart Brookes on June 23, 2014 at 10:53pm
Hi Roberto,

Ok will do. Cheers



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