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Author Topic: Question regarding internal voltage reference  (Read 1803 times)
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Not sure what you mean by this :/
I plan to use the arduino function analogReference(INTERNAL) in conjunction with the attached circuit.
For a project powered directly from a battery, you can measure VCC without a resistor divider using the following formula (read from channel 14, reference is VCC):

VCC =1.1V * 1024 / ADC

If you power your board through a regulator (as in your case), this approach can not be used to determine battery voltage.
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