Stensat StenBOT Rover Kit, Manual

Page: 108 / 180

108 108
Analog-to-Digital Converter
●
An analog-to-digital converter or ADC is a device that generates a number
based on the voltage level it measures.
●
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.
●
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.
●
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.
●
Voltage the ADC measures can be calculated by the equation
V = (ADC value/1023) * 5.0