Chapter 6 Battery
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Related knowledge
ADC
An ADC is an electronic integrated circuit used to convert analog signals such as voltages to digital or binary
form consisting of 1s and 0s. The range of our ADC on ESP32 is 12 bits, that means the resolution is
2^12=4096, and it represents a range (at 3.3V) will be divided equally to 4096 parts. The rage of analog values
corresponds to ADC values. So the more bits the ADC has, the denser the partition of analog will be and the
greater the precision of the resulting conversion.
Subsection 1: the analog in rang of 0V---3.3/4095 V corresponds to digital 0;
Subsection 2: the analog in rang of 3.3/4095 V---2*3.3 /4095V corresponds to digital 1;
…
The following analog will be divided accordingly.
The conversion formula is as follows:
𝐴𝐷𝐶 𝑉𝑎𝑙𝑢𝑒 =
Analog Voltage
3.3
∗ 4095
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