What is an LDR?

Arduino and LDR Sensor Testing: How Sensor Values Change Based on Light Intensity

Various types of sensors are utilized when creating Electronics and Automation projects with Arduino. Among these, the **LDR (Light Dependent Resistor)** is a straightforward and widely-used light sensor that enables detection of whether environmental light levels are low or high.

In this experiment, an LDR was connected to an Arduino board to test how sensor readings change under different lighting conditions.

What is an LDR?

**LDR stands for Light Dependent Resistor.** It is a re

Generally speaking:

* ☀️ When light increases, the LDR's resistance decreases.

* 🌙 When light decreases, the LDR's resistance increases.

By utilizing Arduino's Analog Input, voltage changes or analog values from the LDR circuit can be read to gain insight into light variations.

LDR Testing with Arduino

This experiment requires a standard Arduino board and an LDR sensor