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    •  Battery: A battery gives power to make things like toys, lights, or other

                                                    parts work. It has two ends—one positive (+) and
                                                    one negative (-) and they need to be connected the

                                                    right way for things to work.

                         • USB Cable: A USB cable is a wire that connects

                         different  things  together,  like  charging  your
                         tablet or connecting a toy to your computer. It

                         helps electricity or information travel from one thing to another.

                                                                  •  Battery OTG  Socket:  This  is  a  special
                                                                 part  that connects the  battery  to  other

                                                                 pieces so they can get power, like plugging
                                                                 something into the wall to charge it.

                      Create a Model of Water Level Indicator Using Smart Circuit Kit

                      To create a model of water level indicator using smart circuit kit, follow

                      the given steps:

                      Step 1       Take out all the components from the smart circuit kit:

                                  • LED                         • Switch                      • Battery
                                  • USB Cable                   • Battery OTG Socket

                      Step 2       Connect the switch to one side of the LED.

                      Step 3       Attach the positive terminal of the battery to the free end of the

                                    switch, leaving the negative terminal of the battery free.

                      Step 4       Take a connecting wire and attach it to the negative terminal of
                                    the LED. Leave the other end of the wire free.

                      Step 5       Place the two free ends of the wires into the water tank and
                                    observe what happens.

                      Output

                      When the switch is turned ON, the LED will light up. When you turn the
                      switch OFF, the LED will stop glowing. This shows how the switch controls
                      the light by letting power flow from the battery to the LED.

                          40     RoboGenius (V1.0)-II

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