How to Use a Photoresistor (Light Sensor) with Arduino (Lesson #27)

The video tutorial explains how to use a photoresistor as a light sensor in Arduino projects. It covers the basic principles of how photoresistors work, including their resistance changes with light levels. The tutorial guides viewers through building a circuit using a voltage divider and connecting it to an Arduino. It also explains the code needed to read sensor values and control an LED based on light levels. The video includes a simulation demonstration and discusses how to adjust resistor values for different applications.

How does the Arduino measure light levels using a photoresistor?

What is a voltage divider circuit and how is it used with a photoresistor?

Discuss how changing the resistor value in a circuit with a photoresistor affects the sensor readings.