Stensat StenBOT Rover Kit, Руководство пользователя

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Analog-to-Digital Converter
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An analog-to-digital converter or ADC is a device that generates a number
based on the voltage level it measures.
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The ADC on the processor board can measure a voltage range from zero to
5 volts. If a higher voltage needs to be measured, the voltage divider circuit
could be used to reduce the voltage to 5 volts or less.
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The ADC is 10 bits. This gives a numerical range of zero to 1023. It is a
linear relationship to the voltage range of 0 to 5 volts.
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The ADC will generate a value of 0 for 0 volts, 1023 for 5 volts, and 511
for 2.5 volts. The resolution of the ADC is 5/1023 or 0.00489 volts per bit.
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Voltage the ADC measures can be calculated by the equation
V = (ADC value/1023) * 5.0