Hello, I ordered and received a OAK-FFC IR from the Luxonis shop website. I cannot find any details on how to correctly hook this up to my OAK-FFC 4P though. The shop page does not include any documentation links. Any links, docs, pictures, videos, code samples, etc… would be greatly appreciated!

Hi hcwiley The IR module should be connected as displayed on the image: Hope this helps, Jaka

(note that only newer revisions (R5+) of the OAK-FFC-4P actually have this connector)

Ok, so the OAK FFC 4p I ordered at the same time isn't the right revision of the board? There's no mention of this on the page, so that's kind of frustrating. I've now ordered two of the OAK FFC 4P, 2 pairs of 9282, and 2 of the OAK FFC IR. And apparently, y'all sent me the old revision of the OAK FFC 4P without any ability for me to select the latest revision. Can you point me toward the relevant schematic change so I can see about wiring this IR board into the OAK FFC revision that I have? I have a hot air rework station and can assemble what I need to make it work. Or, I'm happy to exchange my whatever revision I have for the new version that actually supports this IR board without intervention.

Hi hcwiley , Correct, you can see on the PCBA it's R4M1E4 , and since R5... we have added the support for FFC-IR. Please send an email to support@luxonis.com , I believe we can replace the FFC-4P to the latest ones. Thanks, Erik

hey @erik is there any possibility for me to rewire in my shop? One of the reasons I was interested in ordering Luxonis parts is due to the open-source hardware. I don't see any revisions of late on the FFC 4P directory: https://github.com/luxonis/depthai-hardware/tree/master/DD2090FFC_DepthAI_4-camera_FFC Am I missing something? Did y'all change the location of where the schematics changes are being tracked?

Hi hcwiley , I think we just forgot to update the designs to the latest, will ping the HW guys to push these revisions out🙂 I am not entirely sure, but to me it would seem PITA to try to solder wires to different test pads to get the "final cable" out that you can connect the FFC-IR to.

PR here: luxonis/depthai-hardware 400

It looks like the BOM is incomplete for this revision There is no J12 listed in the BOM and that is the connector that is being used for the IR projector. Am I missing something?

Hi hcwiley Check this BMO085 version . Hope it helps, Jaka

I received my new board today and it is rev 5! hooray! are there any more resources you can share with me about using this projector @erik or @jakaskerl ? I would love to see docs on setting this thing and how to configure the python SDK to control it. I've been re-reading the frame-syncing docs to see if it covers but not seeing anything.

OAK-FFC IR

hcwiley

I've set it to max of 1200 and it has no effect

hcwiley

hcwiley FPS: 30.23| 30.00Dot projector brightness: 1100 True

I added a print statement after setting the dot brightness to see the return value.

The API is recognizing and returning true that it is setting the brightness

hcwiley

@erik any more thoughts here?

erik

hcwiley Could you also try switching over this switch (number 2)? I believe the projector/LED needs an external trigger from one of the cameras so it's synced.

hcwiley

that was it!

hcwiley

It seems the projector and flood are backwards though. Something to look into, but at least I'm up and running now

erik

Hi hcwiley
It's a known issue with the older FFC IR board (hardware errata), the newer batch already has this fixed.

wamj45

So I have a similar set up. But I am unable to see the IR projections as well as a OAK-D Pro. For the FFC-4P set up I have:

2x OAK-FFC OV9282s Monos setup as stereo
1x OAK-FFC AR0234 M12
1x OAK-FFC IR sensor

Whenever I run the depthai/depth_sdk/examples/stereo.py example script the output looks very different the FFC-4P and the OAK-D Pro.

I have also tried just running the mono_preview.pyscript with only one Mono camera enabled. Yet I can barely see the dot projections. They are only visible on objects up close.

Is there something that I am missing here?

hcwiley

The OAK-FFC OV9282 i ordered from the Luxonis shop are NOT IR sensitive as they have IR filters on the lens. It does not say this on the shop webpage unfortunately, and the documentation page lists a lot of OV9282 variations. some are IR sensitive and some are not. I've decided to go a different route.

erik

We will be updating the store asap and adding additional info, we apologize for the inconvenience.

hcwiley

The silk screen on the IR board is backwards from what I can tell with my multimeter. I don't see the schematics for this board in the repo anywhere. I'm tracing leads and the pin on the DIP for 2 has continuity to pin 2 on the OAK 4p board like it should, but on the IR board the silkscreen for 1-10 appears to be backwards since continuity is on pin 8 there. also just looking at the boards you can tell the screen is backwards.

pzhine

Hi @erik , I see you have updated the OAK-FFC OV9282 page to say "IR Sensitive: With IR filter", thank you. However, it looks like all of the camera modules have IR filters. Why would you do that? How are we supposed to use the IR projection or illumination offered by the FFC system in that case? Is there an advantage to using cameras with IR filters that we should be aware of?

erik

Hi @pzhine ,
For all future batches the OAK-FFC-OV9282 will have bandpass filter instead, but we still have about 50pcs in stock before we manufacture another batch of these. If you are interested in these FFC-OV9282 /w bandpass filter we can also ship from EU office where we'd glue CCM onto the CBA (FFC PCBA), which doesn't take much time. Please contact support@luxonis.com if that would be of interest.
Thanks, Erik

pzhine

Hi @erik , thanks for the quick response! Can you clarify what you mean by "bandpass filter"? What bands does it allow? What is the reason for that type of filter?

Thanks,

Paul

erik

Hi @pzhine ,
Sorry for not clarifying - it's BP @ 940nm, so same wavelength as the dot projector/illumination LED. So that way the sensor would perceive visible light + 940nm.

pzhine

Thanks @erik , I now have a clear understanding of the current and upcoming cameras. My final question is about whether cutting part (in the case of the upcoming bandpass cameras) or all (as in the current cameras) of the infrared spectrum reduces low-light performance of the cameras. I am not referring to a "night-vision" situation where the scene is specifically illuminated by an IR light source, but rather a scene with low levels of light from a visible light source (e.g. incandescent elements).

erik

Hi @pzhine ,
If there would be a light source that produces mostly IR light, then having no IR filter would benefit the low-lgiht performance. But since it's only bandpass (filtering out all IR except around 940nm), this wouldn't be much of a benefit. Thoughts?

pzhine

I think we would need to do some comparison tests. We currently use an OAK-D Pro W in our prototype, but are not using the IR features and would like to move to a more modular format (thus the move to the FFC components). Do you know if the OV9282 imagers in the OAK-D Pro W have the bandpass filter? Knowing the difference between the cameras will help us do a low-light performance study.

jakaskerl

pzhine
OV9282 sensors on the PRO versions have the bandpass (940nm) filter, since the main differentiating factor from non-pro models are the laser-dot projector (for active stereo) and floodlight, which both produce IR light at 940nm. OV9282 cameras serve as the stereo pair and therefore need to be able to perceive the IR light.

Thanks,
Jaka

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