I am using the following voltage and current sensor on my quad copter with APM 2.5 running firmware 3.0.1 because the DIY drones one does not support 6S setups: http://www.rctimer.com/product_861.html
I have it connected as per the old wiki: https://code.google.com/p/ardupilot-mega/wiki/Voltage
I have set the battery capacity in the MinimOSD to 5800mAh as I am using Zippy 6S 30C 5800mAh batteries. I went for a flight this evening using a low voltage alarm on the battery set at 3.3V/cell. According to the OSD, I depleted my battery to -3%, however according to my iCharger, I only put back 2322mA into the battery, or approximately 40%.
Can anyone help me figure out what such a discrepancy?
Replies
I imagine you need to play with the constants (VOLT_DIVIDER and AMP_PER_VOLT) to get the right voltage and current shown. The % figure shown in the OSD is the sum of current over time, so if the current shown is wrong, the mAh used will also be wrong.
Is there not anyone who can shed so light on this?