Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 91 - Robo_Genius_V1.0_flipbook_C4
P. 91

    Concept

                     A light  sensor  on  the  Micro:bit  can  measure  the  amount  of light  in  the
                     environment. By using the Micro:bit’s light sensor, we can control the movement
                     of a servo motor based on how bright or dark it is. For example, when the room

                     is bright, the servo motor might move to one position, and when it is dark, it
                     could move to a different position. This kind of control is useful for devices like
                     automatic window blinds that open when it is sunny or close when it gets dark.

                     Observations

                     After  setting  up  and  running  the  code  to  control  the  servo  motor  with  the
                     Micro:bit light sensor, the following can be observed:

                     1.  In a bright room (lighter): The servo motor moves to 180 degrees. This
                        simulates the motor responding to higher light levels, like opening blinds

                        when it is sunny.

                     2.  In a dim or dark room (less light): The servo motor moves to 0 degrees.
                        This shows the motor responding to low light levels, such as closing blinds
                        when it gets dark.

                     By varying the light levels in the environment, you can observe how the servo

                     motor changes its position, demonstrating how the light sensor can be used to
                     control the movement of a motor automatically based on light intensity.

                     Application

                     A light  sensor  is used  in  solar  garden

                     lights.  During  the  day,  the  light  sensor
                     detects sunlight and keeps the lights off
                     while charging the battery. When it gets

                     dark, the sensor notices and automatically
                     turns the lights on. This way, the lights
                     only  turn  on  at  night, helping  to  save

                     energy and keeping gardens or paths lit.

                                                                                 Basic Motor Control and Sensors  89

| 86 87 88 89 90 91 92 93 94 |