Ohm’s Law and LED Basics

Lesson Details
What is the relationship between voltage, current, and resistance and how to use it to light up an LED?

Activities:

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

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:

ComponentImageQuantityAvailable in Bundle
evive1
LEDs2
220 Ohm Resistor1
1 kOhm Resistor1
10 kOhm Resistor1
1 MOhm Resistor1
Male to Female Jumper Cable 20cm2

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