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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
