Good evening
I am just trying to get the voltage from the A7 pin, and the documentation talks about being a 1M over 470K, which would be 100/47. This should allow a range of approximately 6.6 volts maximum before getting about the 3.3 volt analog input.
Long story short. I have a battery currently measuring 4.0 volts, and it appears as 2.8 volts at A7. Which sounded quite high. This is confirmed by the raw reading of 817. This adds up to 5.2V using 100/47 (it is < 4V)
There seems to be some indication you can measure a 9 volt battery, which would suggest a higher resistor. What am I doing wrong?
Thanks
Scott