Select ProXR Series controllers are equipped with eight on-board analog to digital converters.  ADCs can be used to read many kinds of analog sensors as well as switches.  ADCs are available on all ProXR Lite series controllers as well as ProXR series that begin with ZAD in the part number.  This section of our tutorial will not apply to ProXR series with part numbers beginning with ZUXP.

ADCs are very sensitive to voltages, as their entire purpose is to convert a voltage from 0 to 5 volts into a value from 0 to 255 when using 8-Bit conversion mode (10-Bit mode converts voltages into values from 0 to 2047).  Analog inputs should never be left in a “floating” state.  In other words, they should be connected at all times to a voltage source or ground to keep the quiet.