Introduction to Sensors

ldr circuit
Lesson Details
What are the sensors? How are they categorized based on the output they provide? How to read digital and analog sensors using evive?


  • Understanding the working of evive's Pin State Monitor.
  • Visualizing the light sensor using evive.
Classroom Bundle Used: STEM Classroom Bundle, STEM Mini Classroom Bundle
Prerequisites: None
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Lesson Overview

Students will learn the following things:

  • What is sensor?
  • Classification of sensor:
    • Active and passive sensors
    • Digital and analog sensors
  • What is Light Dependent Resistor and how it works.
  • How to visualise sensor output on evive.

Material Required

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

Lesson Outline

Introduction - 5 minutes
Sensor - 15 minutes
  • Senses that human have.
  • What is a sensor?
  • Classification of sensor according to the power source – Active and Passive sensors.
  • Classification of sensor according to the output – Digital and Analog sensor.
LDR Sensor - 5 minutes
Pin State Monitor - 10 minutes
  • How to visualize the digital and analog sensor output on Pin State Monitor menu?
Activity - 20 minutes
  • Making the LDR sensor circuit.
  • Visualizing the sensor output on evive.
Wrapping up the lesson - 5 minutes

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