I had a minor crash in dirt (hard dirt) and I think the onboard analog to digital convert got whacked.  The voltage bounces around all over the place in betaflight.

Is there an external sensor I can use that would be cheaper than buying a whole new AIO?

I've read where the issue of OSD readings for voltage vary all over the place to place a small capacitor across the pins that take power and ground for the ADC IC. This is for FCs from the factory that havent taken a crash so may not work. What version of the aio fc do you have? Have you been able to identify the ADC IC on the board?

(27-Nov-2022, 05:41 AM)ph2t Wrote: I've read where the issue of OSD readings for voltage vary all over the place to place a small capacitor across the pins that take power and ground for the ADC IC. This is for FCs from the factory that havent taken a crash so may not work. What version of the aio fc do you have? Have you been able to identify the ADC IC on the board?

It's the 6s 8bit version found HERE

identifying the ADC will be somewhat of a challenge.  For the heck of it, I flashed it with bluejay just now and it seems to be a little more stable however, the voltage slowly creeps up on me.  I was able to calibrate a 4s battery at 16.56v and by time I got done fiddling around with other stuff (maybe 2-3 minutes) it was reading 16.8V  Not a lot - it's definitely more stable with bluejay.  This is interesting.

Flashing Bluejay didn't have any effect on this ADC after all.

Does anyone know if the current sensor is legitimate or is current just a calculation? The betaflight tab leaves me to believe it's just a calculation. If it's not then it seems like that actually works as it should.
That's good news as I rely more on that than the voltage sensor anyway...

There is an actual current sensor onboard:



And usually it should be setup as an ADC sensor.

You may need to calibrate it as most targets for FC's do not come with the correct current sensor scale.

That m30 likely seems to be my issue. Current sensing appears to work, but voltage sensing took a huge crap.

I reached out to Diatone and they responded, telling me the Voltage sensor is on the FC while the current sensor is on the ESC. Does that make sense being an AIO? I understand they are two different entities on an AIO...

For an AIO it makes no sense to me.

The shunt resistor aka current sensor even on a ESC (part of a stack) simply passes the analog current data to the FC via the Curr wire and we set it up as an ADC current meter in Betaflight.

Back in the day with Omnibus F4 FC’s we had a current sensor on the FC and again it was setup as an ADC current sensor.