I'd like to monitor a 12V boat battery. I don't want to risk damage to the ADC input, what with pumps and things kicking in and out.
Would a 50k resistor from the bat+ and a 10k to ground, with a 0.1uF cap across it be relatively safe? Or is there something better I can do?
If it gets too complicated, I won't bother, it would just be a nice extra.