I am planning to use the RVOSD current sensor to measure the voltage and current of my system. Everybody knows that the power module from ardupilot is not compatible with 6s batteries. What I feel sorry. So i am interested to use the current sensor from a rvosd because is a really good one and can handle high voltage batteries. I will feed the APM with BEC, or will be even better if I can do both, power up APM and measure the batteries with the rvosd current sensor.Any ideas how to do it?
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Simple:
1) get a small 2s cell to power your APM via the a BEC or the APM Power Module if you have it
2) Power your copter ESCs with your 6s cell and monitor your power with an external power sensor https://www.sparkfun.com/products/9028 or http://www.rctimer.com/product_861.html connected to pins A1 and A2 of your APM https://code.google.com/p/ardupilot-mega/wiki/Voltage
Much better this way.
5.5V BEC connect to the Outputs rail with JP1 in place and you will be good to go. You can also use the https://www.sparkfun.com/products/9028 90A sensor as well
You need to add a BEC to the RVOSD current sensor, the output voltage needs to be a little higher than 5v to compensate for the diode drop on APM2.5.