Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 28 - Robo_Genius_V1.0_flipbook_C7
P. 28

    Circuit Operation

                      The  LDR senses  changes  in  light  intensity.  When  it’s dark, its resistance  increases,  causing  the
                      transistor to turn on. This allows current to flow through the LED, illuminating the street light.

                      Concepts

                        Components of a Circuit: Learning about light-dependent resistors (LDRs), LEDs, and transistors.

                        Simple Circuits: Designing circuits that turn on lights based on environmental conditions (light
                         levels).
                        Sensor Integration: Understanding how LDRs function and their role in detecting light levels.

                        Real-World Applications: Exploring the use of sensors in smart technology and their benefits to
                         society.

                      Observations

                      In the “Automatic Street Light” activity using a breadboard, students will observe how the light
                      turns on automatically when it gets dark and turns off when it’s light. By using a light-dependent
                      resistor (LDR), they can see how it detects changes in light levels. When the LDR is covered or in low
                      light, the LED lights up, demonstrating the circuit’s response to the environment. If the LED doesn’t
                      function as expected, students can check their connections and ensure the LDR is placed correctly.
                      This activity teaches them about sensors, circuits, and automation!

                      Applications

                                                             Home automation: LDR-based circuits can be integrated into
                                                             home automation systems
                                                             to  control  indoor  and
                                                             outdoor lighting based on
                                                             natural light conditions.

                      Garden lighting: Outdoor Garden lights can utilize LDR sensors
                      to automatically illuminate during dusk and dim or turn off during
                      daylight hours, enhancing aesthetics and safety.

                           26    RoboGenius (V1.0)-VII

| 23 24 25 26 27 28 29 30 31 32 33 |