Current sensor scaling

[biggestRCEfan]

Maidened my baby tri (RCE stock) this weekend. Nippy little bugger, need to balance having fun with damage control …!!

The current consumption reported by the F3FC board is out. I saw some mention of bumping up the scaling from 360 to 544. That did not work for me, although it may be slightly better. The problem is that it reports way more than actually consumed.

Does anybody know the mechanics in calculating the consumed mAh? What does the scaling do?

On the integrated F3FC of my Mini the consumption seemed spot on without any (additional) scaling.

[phasor]

If you have a way of seeing what how many mah used from the current sensor (like an osd or telemetry) then you should be able to use the following formula to get you close.

scaling number used in the configurator X the mah indicated by telemety or OSD divided by the mah your charger indicates that you put back in.

This number now should be the number you put in the configurator current sensor scale.

I did this on a BetflightF3 flight controller and it gets me close.

Jerry

[biggestRCEfan]

Thanks Jerry. Will give it a shot. Was just wondering why on one board it is spot on or close enough but inaccurate on another board type? But I guess the triflight version I use has default scaling adjusted already for the integrated F3FC definition and should be adjusted for the baby trip F3FC, which I guess has a different definition.

[phasor]

My friend has a BetaflightF3 also and his number is a little different than mine but we are both within about 20 mah accuracy which is close enough for me.

Jerry

[phasor]

I also forgot to tell you that you may want to do it several times to get an average.

Jerry

[bhuism]

@phasor, what d’you use for bff3?

[phasor]

I’m not at home to check but I believe that I used 247. I ran five batteries and averaged the numbers. This was on a quad running 4s LIHV 1500 batteries.

Jerry

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