Ohm’s Law and LED Basics

Ohm's Law & LED Basics - Classroom Activities
Lesson Details
What is the relationship between voltage, current, and resistance and how to use it to light up an LED?


  • Glowing an LED using evive.
Classroom Bundle Used: STEM Classroom Bundle, STEM Mini Classroom Bundle
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Lesson Overview

Students will learn the following things:

  • Ohm’s Law: The relation between voltage, current, and resistance.
  • LED and its property.
  • Activity: Making a circuit to glow a LED. Calculating the minimum resistance required to glow the LED safely.

Material Required

1 set of the following material per group of 3-5 students:

Lesson Outline

Introduction & recap of the previous class - 5 minutes
Ohm’s Law - 10 minutes
  • Discuss the relation between voltage and current using the pump water system.
  • Define Ohm’s Law.
  • Give an example of how to use Ohm’s Law using a simple circuit.
LED - 10 minutes
  • Discuss what is LED?
  • Discuss the three property of a LED – Polarity, Intensity, and Safety.
Breadboard and its usage - 5 minutes
Activity: Making a LED circuit - 25 minutes
  • Introduce the power module of evive and how they will use it to power the LED circuit.
  • Make the LED Circuit.
  • Get the minimum resistor value for the LED circuit using the LED property and Ohm’s Law.
  • Change the resistor value and note the effect on the brightness of the LED.
Wrapping up the lesson - 5 minutes

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