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    18. FAN                                     1    19. USB CABLE                                 1

                       20.     BATTERY OTG
                                                                   1    21. JUMPER WIRE                               2
                           SOCKET

                                                                        23.  MAGNET BASE
                       22. BUTTON                                  4                                                  1
                                                                            PLATE

                      Making a Circuit of Torch Light

                      The components of a Circuit are LEDs, Switch, and Resistor.

                      LED (Light Emitting Diode)

                         • LEDs are small electronic device that emit light
                         when an electric current passes through them.

                         • LEDs have two leads (terminal): the longer lead is
                         the positive (anode) and the shorter lead is the negative (cathode).

                         • LED comes in various colors.

                                                        Switch

                                                            •  A switch is a simple device that is used to either
                                                           break the electric circuit or to complete it.

                                                           •  Mechanical  switches:  These  require  manual
                                                           contact  with  the  switch  for  operation  and  are

                                                           classified into various types depending upon the
                                                           poles.

                      Resistor

                         • A resistor is an electrical component that limits
                         the flow of current in a circuit.

                         • It is used to control the amount of current that

                         flows through an LED to prevent it from burning out.
                         • Resistors have a resistance value measured in ohms (Ω) that determines

                         how much current they allow to pass through them.

                           36    RoboGenius (V1.0)-III

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