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    4.  Output or Action: Once the signal is processed, the system may take action based on the
                         sensor's reading.
                         For example:

                              If a PIR sensor detects motion, the system                      A typical PIR sensor can
                             might turn on lights or send an alert.              SMART      detect motion up to 20 feet

                              If a soil moisture sensor detects dry soil, it     SPARK          (6 meters) in range.
                             may trigger an irrigation system to water the
                             plants.

                      USING TINKERCAD TO SIMULATE SENSORS

                      Tinkercad allows students to explore how sensors work in real robots and electronic
                      projects.  To open  Tinkercad, first open  your  web  browser and  then  search for
                      https://www.tinkercad.com or scan the QR code. By using its Circuits feature, you
                      can  connect components like  light  sensors, temperature  sensors  or ultrasonic  sensors  to  the
                      microcontroller  and  see how they  respond.  This  helps  you  understand  how sensors  collect
                      information from the environment and send it to the robot to make smart decisions—just like in
                      real-life robotics.

                                                             CHALLENGE CHAIN
                        If you wanted to measure the distance between objects using sound waves, which sensor would
                        you use and what changes would you make to the circuit to make it work?

                                     AI RoboGenius - VII
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