Hi All,

I was testing bottom LEDs on Mavic 2 Pro today and noticed they are not litting steady but flashing/blinking in very fast frequency but it is annoying like when you have not well filtered led lamp. Is this the same also for you?

Thanks,

David

Mine are solid when turned on, at least to my eyes it is.

Hi. Thank you for reaching DJI Forum. Can you please send a video showing the problem? You can upload it through dropbox or youtube and provide us the link. Thank you.

I will try to do video of that issue but I'm not sure if camera will be able to catch very high speed of flickering.

DH_Pilot Posted at 2018-8-30 06:06
I will try to do video of that issue but I'm not sure if camera will be able to catch very high speed of flickering.

Alright. Please let us know what will happen. Thank you.

Boy... LED or light flicker is going to have greatly varied opinions based on the observer. If you tested 100 people, maybe half will say they see it and the other half might ask what kind of psychotropic drugs you've been taking because they won't notice anything at all. The other way to think of this...go investigate the people that see the "rainbow effect" on DLP projectors and then look at all of the people that don't see any of it. In the end, all lights flicker...there's just no two ways about it...but LEDs are notorious for producing visible flicker if not regulated properly. I mean, they're the closest to binary light source we just about have. They're either ON (Producing light) or they're OFF (Absolutely no light). I haven't gotten my Mavic 2 Zoom yet, but I'll check it out and see if I can "see" them flicker when I do.

Hi Txtechnonerd,

I totally agree with you if it is really flickering like in normal life - projector, television...etc but in this case it is really noticeable.

David

so this seems to be not isolated case.

Solid on here, and I pickup on poor lighting and cheap TV’s!

Buzzyone Posted at 2018-8-30 08:53
Solid on here, and I pickup on poor lighting and cheap TV’s!

You have Pro or ZOOM?

I'll report to you  if I see the flickering when I'll receive my MP2 in the next days .

Thriller Posted at 2018-8-30 09:15
I'll report to you  if I see the flickering when I'll receive my MP2 in the next days .

OK Thanks.

Given the drone appears NOT to have precision landing any more, what exactly is the purpose of the light?

gnirtS Posted at 2018-8-30 09:33
Given the drone appears NOT to have precision landing any more, what exactly is the purpose of the light?

I have no doubt that precision landing is simply the standard now and therefore no longer displaying and having to be selected at take off.

Dirty Bird Posted at 2018-8-30 10:35
Because they are just freaking cool!  

....

Mine appear to be on solid BUT, they sure could be modualing them with a LED driver and just above a humans visual perception thresholds. Saves power ya know but, some ppl might have like bat vision or something I reckon and can detect a flicker.


If ya have a o-scope and a photo diode, turn on the landing light aimed at the photo diode, you could confirm the moduation with the scope.......That is, if you need to know.

gnirtS Posted at 2018-8-30 09:33
Given the drone appears NOT to have precision landing any more, what exactly is the purpose of the light?

This is what I noticed as well.
Mavic 1 used to land within an inch from the stating point.
My MP2, tried several times during day time, hovering on spot before leaving the landing pad, but every landing happened like 3 meters away.
I did check all the settings, my Vision Position is enabled which states "Hovering without GPS, and supports Landing Protection and other systems." I wonder if Precision Landing is included in there.
Am I missing something? hope we are not going backwards.

Thanks,
-FC

According to DJI support precision landing has been REMOVED from the M2P which is ridiculous.
So yes, unless its a firmware update they've gone backwards from even the Spark.

Dirty Bird Posted at 2018-8-30 13:06
The flicker captured on video...

https://youtu.be/mG-jJIRWgEQ

Very cool.......Could you share the camera settings?? That didn't show up in my recordings

Dirty Bird Posted at 2018-8-30 18:01
Camera was set to 4K (full FOV) in full auto.  My launch location is a brand new building with all LED lighting.  Not sure if that would make it show more or not?

Yes and good point, perhaps that flicker is a "beat freq" between the two (AC and Building/Street Lamp LED's).

f(beat) = |f2(M2P LED)- f1(Bulding LED)|

Re-record same settings BUT, less any building/street LED's, perhaps flicker will vanish then?

My non-flicker recording was less any other LED sources........Neartest street lamp is a old school sodium vapor type.

Dirty Bird Posted at 2018-8-30 13:06
The flicker captured on video...

https://youtu.be/mG-jJIRWgEQ

Hi Dirty Bird,

Yes that is exactly the same flicker as on mine.

@DJI could you please address this one?

Thanks.

DJI could you please give us your statement on this? Is this defect?

same with me

I noticed this also and just assumed they are PWM controlled and not set to 100% duty cycle, they probably produce too much heat. Possibly a future addition ability to strobe them or change brigheness. You notice it more if you hold the drone, turn the bottom leds on and move it around.

The flicker is indeed there and it seems normal. I manage to capture it shooting at 24 fps, higher and It won't notice it. To my eyeres, however, its solid.