A motion detection apparatus and method for detecting motion in an
apparatus being monitored, and for controlling operations of the
apparatus being monitored. First logic of the apparatus processes
electrical signals output from an optical detector to produce values that
represent movement or an absence of movement of the apparatus being
monitored. Second logic of the apparatus receives the values from the
first logic and processes them to determine whether the values indicate
that the apparatus being monitored has moved. When a determination is
made that the apparatus being monitored has not moved, the apparatus
being monitored is change from a current mode of operations to a
different mode of operations.