I was wondering what the possibilities are of measuring the voltage of a LiFe battery pack of 13.2V. I know I can divide the voltage so its 5V at 13.2V and measure the 5V with the analogue input of the Arduino to see the drop.
Now what I am worried about (this is where my limited electronics knowledge gets me), is it safe. I am afraid that I might feed the Arduino boards analogue input a massive current and completely blow the life out of it. Maybe my previous stated idea is wrong from the start and there is a safe solution.
The battery feeds a big motor, a big servo some sensors and the Arduino board. The battery pack is from Graupner (13.2V 2000mAh) 4C LiFe. For these kind of batteries it is not recommended to completely discharge them, that's why I want to cut it's supply before this happens.
I you guys can help me, (maybe there is a thread already about this topic but, I was fighting the new search engine and I lost)