How to Use a Single DJI O3 Air Unit on Multiple Drones with Backpack Holder

by Oscar
Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Fpv Drone

The DJI O3 Air Unit is expensive, and it may not be feasible to purchase one for each of your FPV drones and fixed wings. If you’re on a budget, consider using TPU or aluminum holders (backpack) so you can use one single DJI O3 Air Unit for multiple aircraft.

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Where to Buy?

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Gopro Session Compare

There are two types of DJI O3 Air Unit backpack holders: TPU 3D-printed and aluminum. These backpack holders transform your O3 Air Unit into an action camera similar to a GoPro Session. The main advantage is that the O3 can be powered directly from the drone, eliminating the need for a separate battery while providing FPV capabilities.

The aluminum holder is more robust and offers better cooling, as the entire case acts as a heatsink for the video transmitter. Purchase the aluminum holder here: https://s.click.aliexpress.com/e/_DEzZFuD

Dji O3 Air Unit Camera Vtx Aluminum Aio All In One Holder Bracket

Dji O3 Air Unit Camera Vtx Aluminum Aio All In One Holder Bracket Back

The TPU holder is more affordable, lightweight, and still provides reliable protection during crashes. The weight saving is significant (weighs a little over 20 grams, almost 17 grams lighter than the aluminium case’s 37g), making it my preferred choice for 5″ FPV drones. Get the TPU holder here:

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Install 3

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Weight

If you’re interested in purchasing an additional O3 Air Unit, find them at these retailers:

Installing the DJI O3 Air Unit in the Backpack Holder

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Unbox Accessories

Begin by inserting the camera into the holder, ensuring that the DJI logo on the back is correctly oriented. Secure the camera with four M2 screws on both sides.

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Install 1

Next, remove the cable in the air unit and push the Air Unit into the TPU mount. Fasten the backplate with the provided screws and position the antenna in the holder on the backplate. That’s all there is to it.

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Install 2

Setting Up Your Drone

Configure your flight controller as you would with a standard DJI O3 Air Unit, following the steps outlined in this tutorial: https://oscarliang.com/dji-o3-air-unit-fpv-goggles-2/#How-To-Setup-DJI-Goggles-2-and-O3-Air-Unit

Get a cable long enough to get to the O3 Air Unit from the flight controller, the connector needed is called “JST SH1.0mm 6-pin”. You will need one of these cables for every drone. Opt for silicone wires with a gauge of 26AWG, 28AWG, or 30AWG. You can find such cables easily on AliExpress:  https://s.click.aliexpress.com/e/_DFQTJSV

Additionally, you will need a GoPro-style mount on each of your quads.

Stp Hobby Armor 5 Fpv Drone Rushfpv Gopro Mount

Transferring the Air Unit Between Models

To move the O3 Air Unit to another drone, just unplug the cable from the O3 Air Unit, attach the O3 to another quad in the same manner as a GoPro, and then connect the cable.

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Fpv Drone

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Fpv Drone Side

Dji O3 Air Unit Camera Vtx 3d Print Tpu Aio All In One Holder Bracket Fpv Drone Back

Conclusion

So there you have it – a straightforward and cost-effective solution for sharing a single DJI O3 Air Unit on all of  your FPV drones with this backpack technique. Happy flying.

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12 comments

Hanan 9th August 2023 - 8:06 pm

Is there anything similar for walksnail?

Reply
Takalani Radali 15th March 2024 - 9:05 pm

I printed this thingiverse.com/thing:5827063 5% bigger and it worked with walksnail v2 vtx

Reply
Onclefly 3rd May 2023 - 11:23 am

Where print it, the STL Bro ?

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Chip Young 2nd May 2023 - 4:30 pm

Is there a mount for the Caddx Vista Nebula Pro that I could use to do the same thing?

Reply
Oscar 2nd May 2023 - 4:55 pm

Not that I know of, maybe try to search on Thingiverse and see if there’s a design you can print yourself.

Reply
Romualds 1st May 2023 - 10:35 am

Ali link doesn’t work.

Reply
Lumpy 28th April 2023 - 10:03 am

Brilliant!

Reply
Mr V 28th April 2023 - 6:46 am

AliExpress links aren’t working.

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Oscar 28th April 2023 - 12:37 pm

sometimes you need to scroll down once clicking the link to find the desired product. AliExpress’s sorting system is quite bad.

Reply
JD Dupuy 27th April 2023 - 10:48 pm

Great idea. I ordered 3 units. Thanks for letting me know Oscar!

Reply
Scott 27th April 2023 - 6:20 pm

Do you know of a 3D print available that we can print ourselves?

Reply
Wawifpv 30th May 2023 - 7:55 pm

Here thingiverse.com/thing:5827063

Reply