ADC - What is the maximum voltage value possible to measure?
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My question is:
(1) What is the maximum voltage value that can be measured by the ADC?
https://learn.adafruit.com/micropython-hardware-analog-i-o/analog-to-digital-converter
It is said here that 1.4V, but I connected the battery voltage of 1V and the value from the converter was already maximum, i.e. 4095.
Does anyone have any suggestions?
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The maximum is 3.3v at an attenuation of 11db. Please calibrate the ADC before usage.