Are you using the Voltage Monitor?

[Kilby]

I remember seeing a few folks complain about the voltage monitor early on. I guess it was draining batteries at a much more rapid rate or something? (I don't recall exactly) I was just wondering if this is the case and if you guys are using it. After having my quad drop out of the sky for the first time last weekend due to a low battery, I'm really liking the idea of auto landing for low power.

Just curious. Thanks!

-Terry

 

[Efliernz]

I would never fly a multi without some sort of monitor!

I used to make alarms and posted them worldwide - mainly for AP rc heli pilots BUT I now use the Quanum 2.4G telemetry system.

It plugs into the balance-plug of the battery. There are two levels of alarms for the cell voltages (I use 3.6 and 3.5v) and an over-all pack voltage alarm. It doesn't react with the 2.4 rx at all due to low power (and sending an update 4 times a second). I still have my overall diy alarm onboard but it is just ballast now!

Pete

http://www.hobbyking.com/hobbyking/store/__10343__Quanum_2_4Ghz_Telemetry_System_Volt_Amp_Temp_mAh_V2.html

View attachment 2059

 

[BorisS]

ah jesus, how i was looking for something like this and was to blind to find it ! Thanks

Boris

 

[Kilby]

I have several low voltage alarms, but I was asking about one built into the DJI. Just wondering if anyone else is having luck before it try it.

 

[Gunter]

I have several low voltage alarms, but I was asking about one built into the DJI. Just wondering if anyone else is having luck before it try it.

I managed to blow up my first one. Geoff sent me a second one and it never worked properly...it started flashing a low voltage warning 10 seconds after taking off!

I now just use my esc's for power and a lipo monitor + timer on my Tx to monitor the battery.

 

[GGoodrum]

Yes, I use the built-in VM function on both my WK-M - equipped XA Hexa, and on my F450/Naza setup. I use 3.4V per cell for the 1st level, and 3.3V per cell for the second, and I use .2V for the "Loss" value for both. So, for my 4s setup, I set the 1st level "No Load" box to 13.8V, which makes the "loaded value 13.6V, For the 2nd level value, I use 14.4V, so the "Loaded" value ends up at 13.2V. With these values I will see the 1st level flashing yellow briefly come on, when under a load (i.e -- a climbout...), and then a few seconds later it will start flashing yellow while in a hover. If I stop and land at this point, there's about 15-20% of capacity left. If I go until the red LED starts flashing, and it starts descending, there is only about 10% left.

-- Gary

 

[Kilby]

Thanks for the info, Gary. I'm going to give it a try this week. I turned it on over the weekend and it seemed to be a little buggy (reporting low voltage with freshly charged cells), but I'm sure it will straighten out after I tweak the settings.

-Terry

 

[Tahoe Ed]

I use it as well. I had an issue with the first version on the WKM, but did some experimenting with the Naza Kit. My settings are very similar to Gary's. Just use your timer as well. When you get close to your warning levels, bring your machine back close to you until you get an idea how it works.

 

[nisouck]

Yes, I use the built-in VM function on both my WK-M - equipped XA Hexa, and on my F450/Naza setup. I use 3.4V per cell for the 1st level, and 3.3V per cell for the second, and I use .2V for the "Loss" value for both. So, for my 4s setup, I set the 1st level "No Load" box to 13.8V, which makes the "loaded value 13.6V, For the 2nd level value, I use 14.4V, so the "Loaded" value ends up at 13.2V. With these values I will see the 1st level flashing yellow briefly come on, when under a load (i.e -- a climbout...), and then a few seconds later it will start flashing yellow while in a hover. If I stop and land at this point, there's about 15-20% of capacity left. If I go until the red LED starts flashing, and it starts descending, there is only about 10% left.

-- Gary

Do not understand your calculation, must be a mistake some where???

 

[Tahoe Ed]

The second level value should be 13.4 not 14.4.

 

[GGoodrum]

Yes, sorry, it should have been 13.4V loaded. Another senior typing moment. :dread: