LDR Sensor Module | Light Dependent Resistor Module for Arduino & IoT

Description LDR Sensor Module – Light Dependent Resistor Module for Arduino & Embedded Projects The LDR Sensor Module, also known as a Light Dependent Resistor module, is a simple and reliable sensor used to detect ambient light intensity. This module changes its electrical resistance based on the amount of light falling on the LDR, making it ideal for automatic lighting systems, light-based control circuits, IoT devices, robotics, and Arduino projects. Designed with an onboard LM393 comparator IC, the LDR sensor module provides both digital and analog output, allowing easy integration with microcontrollers and development boards. The adjustable potentiometer enables precise control over light sensitivity, making the module highly flexible for different lighting conditions. �� Key Features of LDR Sensor Module Uses Light Dependent Resistor (LDR) Detects ambient light intensity Onboard LM393 comparator Adjustable sensitivity via potentiometer Digital output (DO) for threshold detection Analog output (AO) for light level measurement Low power consumption Compact PCB design LED indicators for power and output Compatible with Arduino, ESP32, ESP8266, STM32 Ideal for beginners and professionals ⚙️ How the LDR Sensor Module Works An LDR (Light Dependent Resistor) changes its resistance based on light intensity: High light → Low resistance Low light → High resistance The LDR sensor module converts this resistance change into an electrical signal. The LM393 comparator compares the sensor signal with a reference value set using the onboard potentiometer. When light crosses the set threshold, the digital output changes state The analog output provides continuous light intensity data This dual-output design makes the module suitable for both simple ON/OFF applications and advanced light measurement systems. �� Technical Specifications Parameter Specification Product Name LDR Sensor Module Sensor Type Light Dependent Resistor (Photoresistor) Comparator IC LM393 Operating Voltage 3.3V – 5V Output Type Digital (DO) & Analog (AO) Sensitivity Control Adjustable Potentiometer Indicator LEDs Power & Output Interface 3-Pin / 4-Pin Header Response Type Light Intensity Mounting Type PCB Condition Brand New Quality High Reliability �� Pin Configuration Typical pin configuration of the LDR Sensor Module: VCC – Power Supply (3.3V / 5V) GND – Ground DO – Digital Output AO – Analog Output (optional, module dependent) This simple interface makes it extremely easy to connect with most microcontrollers. �� Compatibility & Integration The LDR Sensor Module is fully compatible with: Arduino UNO / Nano / Mega ESP8266 & ESP32 STM32 boards Raspberry Pi (with ADC) IoT controllers Robotics control systems It works seamlessly with Arduino libraries and basic GPIO or ADC reading code. �� Common Applications This light sensor module is widely used in: Automatic street light systems Smart lighting control Day/Night detection circuits Solar tracking systems IoT-based light monitoring Robotics light-following robots Alarm and security systems Embedded electronics projects Educational and training kits �� Ideal for Education & Learning The LDR Sensor Module is a popular choice in: Engineering colleges and universities Arduino & IoT workshops Embedded systems laboratories School-level electronics learning Student mini and final-year projects It helps learners understand sensor behavior, analog vs digital signals, and comparator circuits. ⚠️ Usage Tips & Best Practices Adjust potentiometer to set light threshold Avoid exposing LDR to extreme heat Use analog output for precise measurement Keep sensor surface clean for accurate readings Use pull-up resistors if required Do not exceed rated voltage �� Package Includes 1 × LDR Sensor Module (Light Dependent Resistor Module) ✅ Why Buy from INFYNIQS Quality-tested sensor modules Ideal for DIY, education & professional use Bulk and institutional supply available Trusted electronics components marketplace Technical support for Arduino & IoT projects