If you set Vref to Vdd and read the A/D, you will find that the constant 2.8V will give you an A/D count of LARGER than 716 when the battery voltage drops below 4V. No resistors needed.
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Re: Voltage Monitoring
If you set Vref to Vdd and read the A/D, you will find that the constant 2.8V will give you an A/D count of LARGER than 716 when the battery voltage drops below 4V. No resistors needed.
Charles Linquist
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