nodemcu / nodemcu-devkit-v1.0

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A0 adc limit input?

johndoe71rus opened this issue · comments

what are the limits of the voltage A0? Usual esp-12x up to 1v, you use a resistive divider at the input.
can i measure li-ion battery voltage?

No, you can't use it to measure li-ion battery directly. You'd better use an amplifier to convert the voltage.

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