I am a bit confused in relation to this paragraph in the APM documentation
The sensor provides a scaled output for battery voltage and current. The outputs are designed for a 12 bit 3.3V ADC. Full range is 51.8 Volts and 89.4 Amps. If you are using a 4 cell lipo or smaller we recommend that you DO NOT use the voltage divider on this sensor board. Rather, we recommend you use the APM onboard voltage divider as this will give better resolution. If you are using the APM onboard voltage divider then install a 3.9k ohm resistor for AN0. If you are using the current sensor board voltage divider do not put a resistor in for the APM onboard voltage divider AND you will have to change the voltage divider ratio in the firmware.
What does it mean do not use the voltage divider on this sensor?
What voltage divider on the sensor?
The sensor didn't come with any documentation.
I have a 3.9k ohm resister installed on AN0 already on my IMU, and I will be running 4s1p battery pack.
Replies
I would like to know about this as well, how do you use the voltage divider on APM and the AttoPilot sensor? If anyone has done it could they post a picture?