4.6 (Battery Monitor Wiring)

• Voltage divider on A7 input pin for battery monitoring

Arduino battery monitoring input pin A7 "need a voltage divider resistors"

If input voltage is over 5V "Arduino pin will be fried!"

• Up to 10V use R1=10K / R2=10K resistors

• Up to 15V use R1=20K / R2=10K resistors

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Next step see Buzzer wiring