Hi. I have a very short and simple question, "Can arduino meausure its own power supply?". I know the analog pins can meausre up to 5v but I am measuring 2 18650 batteries in series which sums up to 7.4v.
I am doing this to measure the voltage of the battery to know how much power it has left to warn me whenever I need to recharge. I might use a voltage divider to step down the voltage and just tweek the code, but I am not sure if this will work. The Arduino IS ALSO POWERED by the SAME POWER SUPPLY (2 18650 batteries). It connects to the Vin pin, so it a bit confusing for me. Looking forward to your reply:grinning: