Sub 100g whoop with battery and a stock DJI O3 Air Unit?
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- čas přidán 17. 01. 2023
- The DJI O3 Air Unit is amazing yet it is considerably heavier than other digital HD systems in the market. While it is possible to "go naked" to save some weight, the task is quite daunting.
The good news is that it is still possible mount a stock O3 on a 2" whoop, even on a 75mm! The build is pretty easy and nothing beats having a sub 100g machine, including the battery, that does 4k stablized recording and 1080p streaming with a flight time close to 4 minutes.
Note that the whoop is quite rear heavy especially the 75mm one, it seems to affect takeoffs the most so be ready to compensate ;)
Parts list for 75mm
- DJI O3 Air Unit
- BetaFPV AIO 12A
- 0802 16,000kv motors
- Gemfan 40mm 1610 props
- 75mm whoop frame
- Vecro strap
- Zip ties
- Double-sided tape
Music by:
TattooedPreacher
pixabay.com/users/tattooedpre...
AlexGrohl
pixabay.com/users/alexgrohl-2... - Zábava
That's the art of diy fpv, as long as it flies.
Thank you very much for watching!
This is the first time I heard someone calling DIY fpv an art, I am thrilled! 🤩
Tiny cinewhoop and 3.5" freestyle are the sizes where I am most excited about the 03. Nice build.
I wanna get another O3 for my LR 4" too!
You're incredibly talented! :)
Super cool builds thanks for sharing. Hope to see some flights cheers
I am delighted that many of you enjoy the build video, thank you! This quad was built specifically for my current Japan trip and I have flown at some epic places such as mount Fuji, Kyoto, and Okinawa. I can't wait to post videos but I don't have anything that runs Gyroflow while on the trip...
Wow it's Burnaby mountain park in BC, Canada
Yes, it is. Let's fly together!
Well this is just terribly sketchy.
I love it!
Might build this to get past the 100g limit for drones here in Japan.
Lol thank you for watching. Now that the Pavo Pico is already out and I strongly recommend that over this sketchy quad. My build and review: czcams.com/video/X-1k9NEGrs4/video.html
@@flyingpudding I’ve seen it, and it looks great, except I can’t buy it here locally. Which means I need to wait up to a month for spare parts if I break something, which sucks. I think I’d rather build something kinda sketchy from parts I can source locally so I can repair stuff when it breaks immediately.
It does look really nice though, so I’m still considering.
@@joelmulder Fyi the frame is surprising tough being an ultra light quad and I crashed many time without breaking anything. It's pretty inexpensive so you could pick up a spare frame when getting the quad.
good job!
Build. Fly. Rebuild.
That's the fpv journey 😈
Great build, awesome
Thanks Kaka FPV, post your build soon :)
@@flyingpudding I have, please visit to my channel 😊
Bro I lost it when you set that 03 air unit on that 2 sided tape and started putting that zip tie around it lmfao. I do ghetto stuff like that all the time haha. Gotta do what you gotta do!
Lol there is so little real estate onboard to work with, so you are right about do what we gotta do haha!
Yea I built a tank. I use double sided tape and zip ties for esc and vtx 🤣 🤣
@@GregQuillen can't beat the weight saving, durability, and strength! 😉
Thanks so much for sharing your builds and including all the important details. I’m always looking for a reasonably quiet small whoop/cinewhoop for cruising in fairly low light indoor environments. I currently use a hdzero Mobula7 which is pretty good, video quality is ok but not great, tried the Walksnail whoop vtx video looks very good in good lighting but terrible once the light gets below a certain point, also the blacks are poor, so one of these might just fit the bill and of course it’s a good excuse for another build😊
I know. I would have gotten hdz or walksnail if I don't need onboard 4k recording. The low light performance is a bonus too. I look forward to seeing them catch up and even surpass DJI's O3 with future products.
Btw, do you think there will be a smaller O3 from DJI later?
@@flyingpudding IMO, I don't care if there's a smaller 03, I would like DJI to make a smaller naked Vista! Right now, with the Vista and the Nebula Pro Nano camera, it comes to 12.4g. I'd like to see DJI make us something in the range of around 8g. I actually think they've had something like that, but just haven't decided on when to release it. I can't believe they already haven't! It's the only thing making people go with Walksnail or HDZero! Super light, DJI digital VTX and Camera for whoops and small micros! 😎🤘
@@KOrnhOliO1 leaving out the 1s option is just too sad. On the other hand, it was an opportunity for Walksnail and Hdz to enter the fpv market. More competition is always welcome
Is it Bernaby Mount spot? let’s go fly together?! ))
this is a real cool build. it was also on this lighweight but all lipos below 800 had so much high inner resistance, that i sold all my lighweight stuff. i just go with dji digital now to 3s 800 minimum, converting now to 4s 1000 at 3inch with tadpole HD. its next bigger class, but battery sag is now much better and i can fly medium speed around 3minutes to cruising around 5 minutes.
I have a few larger builds too and I agree that they have better performance; while "nano" builds like these are still relevant especially for home or indoor locations, or when you want to keep a low profile.
BTW, I like this 95C Tattu 450mah 2s very much. Indoor flight time is 3:45 draining from 4.35 to 3.5, not too shabby I suppose?
@@flyingpudding ah no, hehe. what? 4.35? how much inner resistance do you have then at high voltage use?
@@rolliseventeen I will check the resistance value during charging next time. HV lipos (4.35v) are commonly used in smaller builds because of higher energy density. High C rating also helps with lower resistance.
@@flyingpudding ok, this is cool i had the normal ones and the resistance was annoying to high. they had a bad voltage drope right at the start of the flight. after a minute it was around 3.4 volts. resistance was around 25 to 30 mOhms with these small cells. have to check my shops about that HV versions.
@@rolliseventeen another thing is that older lipos may sag more because of higher cycles accumulated. You may also check your motor/prop combo and make sure the amp draw is within the limit of the lipo too.
Great👍
Wonderful build! You can take this baby anywhere! Tell me, have you tried to stabilize the video? I'm wondering if stabilization can handle the jelly effect.
As far as I know jello (wavy image) cannot be corrected by stabilization or post processing. On the other hand, RockSteady or Gyroflow should be enough to rectify random wobbles and shaking.
I recorded some footages at home with RockSteady and it looks decent. I will try some faster and aerobatic flights outdoor and post another video 🙏
@@flyingpudding Thank you! It is interesting
The 85mm build Looks awesome. The 75mm is kinda like "whats possible" considering the seize and weight still having an O3, but it doesn't seem to fly "well".
My idea would be 1002 motors and the new gemfan 45mm tri blade on 2S. That would be comprimising small and light, but still flying well. Live the work 🙌
I agree with you that 2" whoops are more suited at this weight. On the other hand, it is easier to achieve the sub 100g objective with smaller motors. It is still possible with the 1002s with 2-3g to spare!
Why sub 100g? That is if you want to travel with your quad to Japan without registration ;)
@@flyingpudding naked O3 😉
@@chrisbee5481 yes, a naked O3 would be the ultimate solution and there are already a few videos on CZcams. The catch is that the "surgery" is not as straightforward as Vista's and the camera also needs to be stripped, and you will also need 3dp parts to hold everything together.
Really enjoyed the build I try to get into fpv plz could you make a o3 air unit with 6 inch deadcat design under 250g long range
Thank you very much. I would say 5" is already a far-fetch while 6" with O3 under 250g is not possible yet. 4" is definitely feasible though. I am looking to convert my 4" LR from vista to O3 later.
you did an excellent job and the 16000kv motors give good power? Well, I have some of 14000kv, will they be useful for my construction? or will the 16000kv ones be better?
Thank you very much Cesar. The 16,000kv 0802 are currently paired with two blade 40mm Gemfan. It would not lift with the 4 blade though. On the other hand, 14,000kv 1002 motors paired with 4 blade 40mm would allow you to do some light aerobatics at the expense of 20% flight time and being a few grams heavier (still below 100g AUW). I think they are worth it because the assurance of extra power.
@@flyingpudding Thank you very much for the advice I will buy 1002
interesting results seems to do alright but can if handle a snap roll or a split s?
I think it should be ok? I may try that in a follow-up video 🙏
Hi I am inspired by your video and trying to upgrade my Cetus X with the betafpv 85x frame and a Caddx Vista vtx. I am almost there but having an issue that the Battery Voltage on my OSD is acting crazy. The voltage was 8.7v (2s) before arming. When I raise the throttle, the number increases immediately to 9-10v and can go all the way up to 28V. I realize that the number responds to the throttle input. When I am in the middle area of throttle, it reads around 22V and when full throttle it goes to 28v. Is there any chance you know what is going on?
Did you flash the cetus' FC to the latest betaflight version? FYI mine isn't the 1s version but an older 2s-4s from the HX100. Anyway, you may want to take note of your current betaflight version and target, back up the config, then flash the latest betaflight to it and set it up from scratch.
@@flyingpudding Thanks for the tip! I believe it’s the latest version but I will double check. It’s flyable though. The amp meter was correct so I can relatively tell the battery usage by looking at the total mah used. Thank you so much for your video giving me the idea of “recycling” cetus x when I move forward to digital system.
do the o3 stay on low power mode even after arming? my osd is available, my wiring is correct and my uart on betaflight is also correct. is it because of 2s battery?
No, do not fly in low power mode as the range will be crippled. This whoop uses 2s and the recording turns on as soon as arming.
Hope the dji support forum helps:
forum.dji.com/forum.php?mod=viewthread&tid=282166&extra=&page=2#comments
@@flyingpudding thanks for the link dude, really save my time…i have to swap uart with crossfire and swap in ports msp..something about the flight controller forbid me from using certain uart for o3..btw i took my quad for maiden flight and have been noticing when i crash, it really hard to turtle mode because the quad will land on o3 with camera facing the sky because of the weight..do u experience the same problem?
Can you recommend a product link to the exact 85mm frame you showed in the video? Thanks!!!!
It is the BetaFPV 85X frame, happy building!
betafpv.com/products/beta85x-frame
amazing build, do you mind telling me where you soldered your o3 cables ?
The O3 has 6 wires, just like the Vista, connected to the flight controller. 2 for power and they go to the bat pads. 2 for TX and RX and they will occupy an UART, 1 for sbus and the last one goes to the signal ground (or just ground)
Here is the pinout of the O3 for your reference:
oscarliang.com/dji-o3-air-unit-fpv-goggles-2/
@@flyingpudding i still dont get the uart thing , i have tx 3 on my flight controller gray cable , rx3 white cable and yellow on rx 1 , how do i know the uart?
@@DanilMinardi the TX cable from the O3 is supposed to go to the RX pad of the UART; the RX cable from the O3 will connect to the TX pad of the *SAME* UART. You cannot use the RX of one UART and another TX of another. They must be on the same UART. Does it make sense?
@@flyingpudding im really new to the fpv world , i still need to understand what the uart is 🥲
@@DanilMinardi ah, an UART is like a "port" which a peripheral such as the O3 uses to communicate to the flight controller. Modern flight controllers may have multiple UARTs to allow connections with multiple devices.
You may want to dig up the manual for your flight controller and look up the locations of the UART RX and TX pads. UART one pads would be named RX1 and TX1, UART two are RX2 and TX2... etc.
Once you locate and choose the UART pads (e.g. RX3 TX3), solder the wires from O3 accordingly (e.g. RX to TX3 and TX to RX3), go to betaflight and open the Ports tab, then enable MSP option on the chosen UART (e.g. UART3). Then the O3 will be able to communicate to your flight controller
HI! Can you please show betaflight settings for O3? I have the same weird flight controller, that has TX1, SBUS ports. I tried to use it, SBUS as RX1, but it doesn't work at all, air unit unable to unlock. Finally i had to use LED as soft serial port. It works, but so unstable.
I feel your pain bro. For some reason sbus on this FC uses UART2. thus I am indeed using UART2 as serial_rx, then soft serial for the O3 (by remapping the LED pad and the TX1 pad). Hope that helps.
@@flyingpudding thanks! I will try it. Do you experience any lags or bad flight characteristics? I also had to disable rpm filters, because cpu load become too high and as result the latency increases dramatically.
@@vkuran I don't notice any lag, and keep in mind that I am using a real UART (#2) for sbus. Soft serial is never recommended for receivers (need cpu for i/o) so you should switch around asap.
Please post your results and happy flying!
Ima build this subbed
Thank you and happy building!
Nice, the flight controller betafpv aio it does not work osd, I have the same flight controller and I cannot have osd in my goggles,
Thanks for watching! Yes, OSD may not work properly with softserial so it is better to upgrade to a more recent board if possible.
The frames don’t last long after a couple crash’s with a full rig.
Yes you are probably right. On the other hand, it is also dirt cheap and easy to swap to a new one, isn't it? ;)
hi any way i could purchase the build from you?
Thanks a lot for your interest. This particular build is for my trip to Japan soon so it is not for sale, at least until the trip ends :) I could build another one later for you though, please email me danny@dannyit.com
How long does it fly?
About 2:30 when flying fast outdoor especially in windy condition. 3:15 slow cruise, and 3:45 when flying slow indoor.
I have a betsfpv frame 1204 motors hd zero and a reaper aoi i think 55 amp 65 grams under 3 inch props all up weight under 100 grams with a 3s or 2s battery 14 percent throttle hover its a beast and flys for 5 mins easy
Yes, you will have a lot more options with hdz being way lighter than the O3.
How does it fly???
While it is not a powerhouse considering the weight that it carries for its size, it is still pretty agile yet stable in a calm day. The whoop hovers at about 40ish percent throttle and I need to add a touch of pitch forward during takeoff to compensate the rear-heavy CG. Just dial down your rates just like others if you want to shoot cinematic footages.
idk about this music tho
Thanks for watching. Could you be more specific about the music?
Nice clickbait thumbnail
Lol sorry I did not intend to be deceiving. Which part of the thumbnail you like the most?