As title, I have 3 or 4 batteries connected in series composed by 7 cell each. I have several Arduino nano and I want to use one on each battery to measure all cells voltage.
Since this batteries are connected in series and all Arduino have a common power supply source, I'll get a short between + and - on each battery if I use this common configuration:
I can't use a single Arduino board because:
- Doesn't have enough Analog ports;
- It's "integrated" to battery;
Also I need a common GND between Arduino boards since there will be communication between them.
How can I solve this problem?