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    exercise

                      A.  Tick ( ) the correct option.
                          1.   What component is commonly used to make an LED blink?

                              (i)   Resistor                                   (ii)   Capacitor

                             (iii)   Brain                                     (iv)   Diode
                          2.   What is the purpose of using an OLED display in a project?

                              (i)   To store data                              (ii)   To display information visually

                             (iii)   To control a fan                          (iv)   To sense motion
                          3.   What role does the IR sensor play in a circuit?

                              (i)   It measures temperature                    (ii)   It detects motion or obstacles

                             (iii)   It controls an LED                        (iv)   It regulates humidity
                          4.   Which component would you use to make a fan turn on automatically when it gets hot?

                              (i)   LED                                        (ii)   DHT11 sensor

                             (iii)   OLED display                              (iv)   IR sensor
                          5.    In a circuit, which component can be used to indicate the presence of an object detected by an IR
                             sensor?

                              (i)   A motor                                    (ii)   A buzzer

                             (iii)   An LED                                    (iv)   All of these

                      B.  State whether the following statements are true (T) or false (F).
                          1.  A DHT11 sensor can measure both temperature and humidity.

                          2.  OLED displays can show text and images.
                          3.  OLED displays require a higher voltage than standard LED displays.

                          4.  An IR sensor can be used to detect the presence of an object without physical contact.

                          5.  An IR sensor is used to measure light intensity.

                      C.  Fill in the blanks.
                                                 security   digital   Celsius   infrared   digital

                          1.  The DHT11 sensor can provide readings in degrees                  for temperature.

                          2.  LED is often connected to a                 pin on the microcontroller.
                          3.  The DHT11 sends data to the microcontroller using a                 signal.
                          4.  You can use an IR sensor to create a                 system that responds to motion.

                          5.  The IR sensor operates by emitting                 light to detect objects.

                           52    RoboGenius (V1.0)-VII

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