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    Working with Potentiometers

                     A potentiometer has a knob that controls the flow of electricity in a circuit. By turning the knob,
                     resistance can be changed.It has three terminals: input, output, and adjustment.

                                                                             Wiper

                                                           Gnd               Vcc
                                                                 Potentiometer

                                                                                                   21 st
                                                                                                 Century   #Information Literacy
                      Activity      Light Dimmer                                                   Skills

                     Overview

                     In this activity, students will learn how to control the brightness of an LED using a potentiometer. By
                     adjusting the potentiometer’s knob, they will observe how changing the resistance affects the LED’s
                     brightness. This hands-on activity helps students understand the relationship between resistance
                     and light intensity in an electronic circuit.

                     Learning Objective

                      Identify and describe the function of a potentiometer in a circuit.

                      Understand the relationship between resistance and LED brightness.
                      Hands-on experience in building and adjusting a simple electronic circuit.

                     Materials Required

                                  Breadboard                Voltage Regulator (7805)     LED x 1      220 Ω Resistor x 1

                         Potentiometer         9v Battery           Male to male Connecting Wires          Battery Cap

                                                                   Hands-On Electronics with Breadboard-Based Kit  19

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