LDR Light Sensor Module (Photosensor)

LDR Light Sensor Module (Photosensor)

Enable your projects to detect ambient light with this simple and effective LDR Light Sensor Module. This board is built around a Light Dependent Resistor (LDR), also known as a photoresistor, which changes its resistance based on the intensity of the light it is exposed to. It’s the perfect sensor for building automatic lighting systems, light-activated alarms, and other light-sensitive projects.

This module makes using an LDR incredibly easy by providing all the necessary electronics on a single board, including a high-precision comparator. It features a dual-output system for maximum flexibility: an **Analog Output (A0)** provides a continuous voltage reading that corresponds to the light intensity, and a **Digital Output (D0)** goes HIGH or LOW when the light level crosses a specific threshold.

This trigger threshold can be easily calibrated using the onboard blue potentiometer, allowing you to fine-tune the sensor’s sensitivity for your specific application, such as detecting the difference between daylight and darkness.

Key Features:

• Sensor: Light Dependent Resistor (LDR) / Photoresistor
• Function: Detects ambient light intensity
• Dual Output: Provides both Analog (voltage) and Digital (HIGH/LOW) signals
• Adjustable Sensitivity: Onboard potentiometer to set the digital trigger point
• Operating Voltage: 3.3V to 5V DC
• Interface: 4-pin header (VCC, GND, D0, A0) for easy connection

Applications:

The LDR Light Sensor module is ideal for a wide range of beginner-friendly projects, including automatic street lights, room light controllers, light-activated security alarms, line-following robots (as part of a pair), and educational experiments demonstrating the properties of light.