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    Each button sends a different signal to the servo motor, and the motor moves
                     to the corresponding angle and stays there until a new signal is received. This

                     shows how buttons can be used to control the precise movement of a motor.

                     Application

                     Students, in a robotic hand, a servo motor plays a key

                     role in moving the fingers. Each servo motor controls
                     the movement of a joint, allowing the robotic hand to
                     open, close, and grip objects with precision. When the

                     servo  motor  receives  a  signal, it moves to  a  specific
                     angle, making the fingers bend or straighten.

                     Combining Sensor to Control the Movement of Motor

                                                        Light Sensor

                                                        A  light  sensor  detects  the  brightness  in  the
                                                        environment.  It measures  the  amount  of light

                                                        present and sends this information to the micro:bit.

                                                        Servo Motor

                                                        A servo motor is a type of

                                                        motor  that  can  move  to
                     a  specific  angle  when  given  a  signal.  Unlike  regular
                     motors,  which  spin continuously,  a  servo  motor  is

                     precise, allowing for controlled movements.

                     When you combine the light sensor and the servo motor
                     using the micro:bit, you can create automated systems that react to changes
                     in light. For example, in an automated shading system, a light sensor detects

                     how much sunlight is present. If it gets too bright, the micro:bit can signal the
                     servo motor to lower the shades, blocking the sunlight and keeping the room
                     cool. As the light level drops, the micro:bit can tell the servo motor to raise the

                     shades back up.

                     The micro:bit reads the data from the light sensor, processes it, and then controls
                     the servo motor based on that information. This system is smart because it

                     adjusts automatically, making life easier and saving energy by controlling the
                     shades without any manual effort.

                                                                                 Basic Motor Control and Sensors  85

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