Analog I/O Demo 4 -- Basic digital to analog converter
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In this demo, we set the DAC to different voltages (their maximum, minimum and then zero). The argument ``channelVoltages`` of
``Datapixx('SetDacVoltages', channelVoltages);`` must be a 2 dimensions matrix with information: [channel numbers; channel voltages].

.. Note::
    You can only use ADC/DAC with the full version of a device; the lite version does not have ADC/DAC capabilities. 

.. literalinclude:: ../DatapixxToolbox/DatapixxDemos/DatapixxDacBasicDemo.m
   :language: matlab
   :emphasize-lines: 23, 38, 39
   :linenos: