Posts made by Vinny

Thanks @joseph-vale for the kind words.
We will continue to try our best
Our success only comes with your success.

Hi @will-huang-oksi

Sorry there is not much else I can offer. I'd need to have the HW in my hands to diagnose.

I'd start with the basics, Power. It is possible you blew the VBUS protection circuit that feeds J3 VBUS. It is also possible that GPIO_157 which enables VBUS on J3 is not correctly set in SW.
However, I still ask you discontinue use of M0151 for Doodle as you will have problems in the future and we cannot continue to support that.

Please follow the guidance listed in our cable page for Doodle. Those boards listed do not use the "VBUS" from J3 (rather we power switch the 5V DC Local with proper Hub monitoring), so you can likely recover proper functionality and continue with your efforts.
Thanks!

Hi @joseph-vale
Great, thanks for clarifying.
Apologies our website is not always perfect. It is maintained by us Engineers, so we often take some info for granted. I am a few years delinquent in adding image sensor design guidance to our tech docs
All our MIPI_CSI lines are indeed 100-Ohm Differential, so the IPEX mate will match.
We include ESD protection on all MIPI CSI and I2C and GPIO/MCLK signals at the VOXL 2 J6, J7, and J8 connectors, so no need to double protect (or you can impact the bus signal quality with the added capacitance).

When you get to the point of generating a schematic, I will offer a courtesy review. Ping me on this thread again and then I can email you privately to share if you wish.

One thing we did on our Coax design was plan on always using the same 26-pin cable, so it is our adapters that vary in pinouts, but our cable is always the fully populate 26 conductor DF56 series.
For Boson/Hadron, we use multiple conductors of 5V. We set that based on the DCR spec of our coax cable, so with your IPIEX cables, you can do something similar to achieve success.
We were also advised by Hirose to NOT use the outer shield as current carrying, so for every +DC path, we have a return GND conductor.

Keep us posted!

@joseph-vale I think a lot of FLIR's docs are public domain, but we did not receive them that way, hence our reluctance. If you can be more specific as to what you need, I'll try my best.

Hi @joseph-vale
Which B2B are you referring to?
If it's FLIR's B2B, that is their data and we cannot share. That is part of the reason why we are not disclosing as much about M0181/M0202 as we do for other image sensors and our coax products.

Our VOXL 2 B2B's are fully documented: https://docs.modalai.com/voxl2-connectors/

Are you asking for something else?
Thanks!

Hi @will-huang-oksi
That board was not designed for 8W support.
Please use the suggested products for Doodle Labs products. As you see, it creates uncertainty and questions we cannot easily answer without a full investigation and analysis in our labs.
Thanks!
Vinny

Hi @joseph-vale
Honestly, if you are making your own backpack for Hadron, then you might as well make your own adapter that mates to VOXL 2.
We have several features in our coax designs that allow us to have flexibility that may not be in your best interest of your backpack. I would hate to over-constrain your optimal designs. From my viewpoint, you are designing your own since ours has some limitation or constraint you do not like. If we provide the full M0181 info then you are effectively making your backpack just like ours anyway.

Hope my advice helps you make a solid decision.
Thanks!

Hi @souksakone
We do not support powering and arming any sUAS from a power supply. The ESC and other electronics will be damaged, and our warranty does not cover that.

If you need a bench top supply for code config, development, etc (without arming motors at all), then we sell a 30W adapter for XT60 here and you can adapt to Starling 2 max without much trouble: https://www.modalai.com/collections/accessories/products/ps-xt60

Hi @Martin-Lukac
Good catch on the pin swap. The Table is correct, with Pin 6 = GND.

The one thing I was wondering is related to this comment:
" I can power the ESC and the FCv2 separately."
That is not necessarily a good thing, and likely to lead to problems if you are powered up or down at different times. If one output (TX) is driving an unpowered input (RX), it could put the HW in a bad state. Please make sure to have them synced for ON and OFF.
Thanks.

Hi @VictorG
Our team sent another batch out...
FedEx tracking 884700036314
They claim Monday you should get it ... sorry for all these delays. We tried!!!

I do not have visibility into our product shipment status, but this issue and experience has escalated the need for me to have that visibility, so I will explore that.

We'll try better next time
Keep me posted.
Thanks!

@Martin-Lukac
Let's ask @Alex-Kushleyev

Hi @Martin-Lukac
It's shown here:
https://docs.modalai.com/voxl-mini-esc-datasheet/#gpio

Hope this helps!!

Hi @Jetson-Nano
I'm not exactly sure how much of an impact one cap will be, the system will still function near 100%.
It is a 22uF cap, 35V rated 1206 package
We have ~50 of these on the design, so missing 1 is not a big deal in my opinion, especially if it is bench testing or software development purposes.
Hope this helps!

HI @Jetson-Nano
That is one of the several dozens of decaps for VBAT. It is possible if the board was subjected to a strong jolt/shock/impact/bending, it can create a micro defect in the cap, resulting in the cap shorting and then burning up. It is not common, but it can happen with the right (or wrong depending on how you view it) angle and strength of impact. This is a common failure mode of MLCC caps of that size and capacitance density. There are several white papers out there to explain this, here is one such doc:
https://www.mdpi.com/2079-9292/12/6/1297

Just make sure you do not see any VBAT to GND shorts across any of the other large caps right next to it before reconnecting your VBAT. Otherwise you can cause an issue with your battery driving a short.
If you still see a short, try removing that cap, but you need a LOT of HEAT with big tips, but then that stresses the other nearby caps, possibly inducing another failure mode.
If this is just not in your comfort level, we can likely RMA that unit if it was bought recently and not in an obvious crash. It looks pretty clean to me.

For note:
Our team is aware of this vulnerability and we always transport and store our ESCs in padded ESC carriers to prevent them bumping into each other during pre-assembly stages.
If you experience any severe crashes, or accidentally knocked your HW off the table, I'd recommend a quick DMM check for VBAT to GND shorts as part of your check-out routine before your next battery. Could save you a fire!!

Hi @ysc
We do not need it back. Please keep it for mechanical reference.
Glad we were able to help you out here.

Thanks!

HI @souksakone
Also, do not ARM the drone when using a power supply. You WILL damage the ESC and we will not honor any RMA/Warranties in that condition. We place warning labels on all main power supply cables for that.
Thanks!

Hi @Dronodev
Yes, the payload connector J2 is included in the system current sensing.
If you needed to get independent readings, you could disable all motor spinning, and get current readings from CH2 which would effectively give you all local quiescent current (including VOXL 2 loads) plus the payload at J2.

Hope that helps.

Hi @smiley
We don't offer longer ones and we have not tested them.
Sorry I can't be of much more help here.

Usually in this situation, I suggest our customers to go and challenge their Mechanical and Industrial Design Engineers to better constraint image sensor placement in the drone given these fundamental constraints.

Hi @Jskim
I'll let someone else from the SW team respond regarding how to configure your SW for this, but I can assure you from a HW viewpoint, we cannot support 2 Bosons directly on VOXL 2 Mini. There is not enough output power.
We only have enough power on a VOXL 2 Mini to power either a High Power ToF or a single Boson, along with our other suite of Tacking and HiRes image sensors. But, 2 ToFs or 2 Bosons will most likely fail and make the power supplies droop/starve the rest of the system, creating other random failures.

VOXL 2 M0154 (not the Mini, sometimes referred to as "classic" or "full size") has enough power to run two of these types of image sensors.

Hi @smiley
There is with near certainly that long of a length will fail to work, hence why we do not offer them.

I have not updated this brief in a few years, but the technical content is still relevant to the Coax cables and our latest sensor line:
https://storage.googleapis.com/modalai_public/modal_drawings/How long can I have our image sensor cables.pdf

Hope this helps explain it.
Thanks!