Lighting systems

Question 1

Sensors used in
the automated
system

Answer 1

light sensors
and infrared
sensors

Question 2

summary

Answer 2

discusses microprocessor-controlled lighting in embedded systems. Examples include light sensors, motion sensors, and infrared sensors. In a house, a microprocessor-controlled water fountain display automatically turns on lights when dark. The light sensor value changes, and the microprocessor sends signals to control the LED lights. Infrared sensor data serves as a security device during unoccupied periods. The fountain display also initiates a pre-programmed display, with signals sent to actuators to turn water pumps on and off.

Question 3

Function of the
actuators in the
automated system

Answer 3

Actuators are only
used if the lighting
system is part
of a display (for
example, a water
and light fountain);
the actuators will
operate pumps and
switches.

Question 4

advantages

Answer 4

-it is possible to control light sources automatically
-a reduced energy consumption
-longer bulb life
-possible to program new light displays for various occasions.

Question 5

disadvantages

Answer 5

-expensive to set the system up in the first place
-if wireless connections chosen (for safety reasons), they can be less reliable than
wired systems
-to ensure consistent performance, the automated system will require more
maintenance (which can be expensive).