An automatic hand dryer (often seen in a restroom) is shown
below. Explain how the sensor of an automatic hand dryer works by
answering (a) and (b) below.
(a) Comment on the type of the sensor and its function The
answer to this question is "OBJECT DETECTION SENSOR." It has a
circuit described by figure 4.Where I am stuck at is part b), how
is the signal processes in the complicated circuit:(b) Explain how
the output signal of the sensor unit is processed to trigger a
blower inside the hand dryer. (i.e. describe the signal processing
circuit). Circuit:
