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    Concept

                        Components of a Circuit: Learning about resistors, potentiometers, and LEDs.

                        Simple Circuits: Creating circuits using a breadboard to dim an LED.

                        Understanding  Components:  Familiarization  with  how  resistors  and  potentiometers  work  to
                         adjust current flow.

                        Proportions and  Ratios:  Understanding  how  changing  resistance  alters  the  current  and
                         brightness of the LED.

                      Observation

                      In  the  “Light  Dimmer”  activity  using  a  breadboard,  students  can  observe  how  adjusting  a
                      potentiometer changes the brightness of the LED. As they turn the knob, they will see the LED get
                      brighter or dimmer, illustrating the effect of varying resistance on current flow. If the LED doesn’t
                      respond as expected, students can check their connections and ensure the potentiometer is wired
                      correctly. This activity helps reinforce concepts of circuits, resistance, and how components work
                      together to control light intensity!

                      Applications

                      Volume Control in Audio Equipment: Potentiometers are commonly
                      used in radios, speakers, and other audio devices to adjust the volume.

                                                  Light Dimming in Lamps: Potentiometers
                                                  are  used  in  dimmer  switches  to  control
                                                  the brightness of lights. By adjusting the resistance, users can set the
                                                  desired light intensity in their homes or offices.

                      Light Dependent Resistor (LDR) Circuits

                      Light Dependent Resistor (LDR) circuits are used to detect and respond to changes in light levels,
                      making them useful in various automatic lighting and sensing applications.

                      LDR Sensor

                        An LDR is also known as photoresistor. “Photo” means light, so a photoresistor is
                         a resistor that responds to light.

                          When it’s dark, the LDR has high resistance, which means
                         it doesn’t let much electric current pass through.

                          When its light, the LDR has low resistance, which means it
                         lets more electric current pass through.

                        Inside  the  LDR,  there  are  materials  that  react  to  light.
                         When  light  hits  the  LDR, these  materials  change  their
                         properties, reducing resistance and allowing more current to flow.

                           22    RoboGenius (V1.0)-VII

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