Using the ADC

  • There are 13 pins that can be used as analog inputs
  • 0 volts on an analog input is an ADC reading of 0
  • 5 volts on an analog input is an ADC reading of 1023
  • Values between 0 and 5 volts give ADC readings between 0 and 1023 (simple linear interpolation)
  • Call OpenADC once (before the while loop) then use the block of 4 functions together whenever an ADC reading is needed.