[@marc]

After seeing how small the thing is, I used the knife.

C9 is gone, Baro is exact!



Thanks, you guys are great!

(on a related note: it says I am ~160m high, but I am about 20m high... is there a calibration process for the baro?)

[f5soh]

No calibration, calc assumes pressure is 1023.5hPa at sea level so altitude measured can change to one day to another.

[TheOtherCliff]

No problem because all calculations are relative to where the mode was switched on.

If it measures the ground to be at 160 meters and you say go up 1 meter it goes to 161.  If it measures 20 it goes to 21.  Both are 1 meter above the real ground.  It can even change from day to day if a big weather front is close.  The secret is that it just gets the current baro altitude when you switch into that mode and everything is relative to that.

[Xviews]

Hallo, This is the my result, buy from banggood
is it good?

[Mateusz]

Hallo, This is the my result, buy from banggood
is it good?

To me it looks ok, but every baro might be a little bit different, due to factory calibration, small difference in caps etc.. You can read this thread and compare to what other people have.
For example this is my Baro [altitude] the red line corresponds to lowering original revo nano by exactly 58cm.

So you get the idea that baro is accurate (like specs says to 10cm), that means it should react on change in altitude by 10cm. Accuracy however says nothing about precision.
You can have values 100, 100, 100, 100 where the true value is 98, that would mean good precision but poor accuracy.
You can have values 98, 99, 98, 97 where again true value is 98, that would more or less suggest better accuracy, but more randomes in measurements so less precision.
 
Baros are quite accurate up to 10cm, but they're not very precise.

[TheOtherCliff]

@Xviews that one should do just fine.

[jobybett]

Just for my Revo from bulkdogs on ebay, seems like I got a good one!! Came with case and a bit of mic foam over the baros

See attachment sorry not worked out images yet

[TheOtherCliff]

That looks good too.  I figure that any FC that has about +-0.5 meters of baro noise (1m total variation) over several cycles of noise is OK.

[lysie]

Just a quick heads up
http://www.xt-xinte.com/F16821.html
From the photos they seem to be using the correct regulator now.. but still bridged the 5V toggle pad with a resistor .

[hwh]

Bridging the toggle pad with a 0 ohm resistor is standard engineering practice for boards assembled by machine.  Normally the second pad set's "resistor" is specified as DNP (do not place) and left open.  Only boards hand assembled would normally have solder bridging them. 

[FlyGuy]

Is there anyway to physically tell if the Revo board purchased is a genuine open pilot board or an aftermarket clone?

[hwh]

If you're buying it new then it's almost certainly a clone.  The only "genuine" revos are used ones being sold by the original purchaser.  It's been quite a while since any "genuine" revos were manufactured and it's rare to find anyone who has one selling it.

[suzali]

Got my new revo clone from Aliexpress today. The one with the german color pins.
After calibrating the first thing i did was to check the baro. Here is the result.
What do the experts say?
 

[Mateusz]

Got my new revo clone from Aliexpress today. The one with the german color pins.
After calibrating the first thing i did was to check the baro. Here is the result.
What do the experts say?

Looks good to me, you can compare it to previous posts. Variation within ~1m is fine. I had spikes up to 9m with bad regulator

[WashirePie]

I got mine from banggood aswell. Its Baro seems to be pretty precise with an average error value of around .6m.

I'd say that's not too bad.

Still got some problems with the GPS Flightmodes, but that'a another topic.