LM393 LDR Light Sensor Module – Adjustable Photosensitive Sensor with Analog & Digital Output for Arduino, Raspberry Pi & DIY Projects | Buy in India

Description:

The LM393 LDR Light Sensor Module is a high-sensitivity light detection module that helps your Arduino or Raspberry Pi projects respond to changes in ambient light levels. Using an LDR (Light Dependent Resistor) paired with an LM393 comparator chip, it delivers accurate analog and digital signals to trigger smart actions like turning ON/OFF LEDs, motors, or alarms automatically.

Whether you’re creating a smart streetlight system in Delhi, a home automation project in Noida, or a robotic vision sensor in Bangalore, this compact, plug-and-play module ensures precision, durability, and ease of integration.

Specifications:

Features:

✅ Dual Output – Analog & Digital

Provides both analog voltage (for intensity measurement) and digital signal (for threshold triggering) outputs.

• 🔧 Adjustable Sensitivity:
  Onboard potentiometer allows easy sensitivity tuning to match lighting conditions.
• 💡 High Stability & Accuracy:
  Built-in LM393 voltage comparator ensures fast and stable light detection.
• ⚡ Wide Voltage Range (3.3V–5V)
  Fully compatible with Arduino, ESP32, STM32, and Raspberry Pi boards.
• 🧩 Compact Plug & Play Design
  Simple 4-pin interface (VCC, GND, AO, DO) for quick and error-free connections.
• 🧠 Ideal for Learning & Automation
  Perfect for students, makers, and engineers working on IoT, robotics, and automatic lighting systems.
• 📦 Durable Build Quality
  High-quality PCB with stable signal output and long-lasting LDR sensor for extended use.

🤖 Applications & Use Cases:

• 💡 Smart Street Lighting – Automatically turn ON/OFF lights based on sunlight intensity.
  
• 🏠 Home Automation Systems – Control devices when ambient light changes.
  
• 🤖 Robotics – Enable robots to follow light or detect environmental brightness.
  
• 🎓 STEM Education Projects – Perfect for school/college Arduino projects.
  
• 🧠 IoT Projects – Monitor light data remotely for smart cities and agriculture.
  
• 📸 Photography/Filmmaking – Use as a light intensity trigger or exposure controller.

Product Interface:

• VCC: 3.3V to 5V DC Power Supply
• GND: Ground
• DO: Digital Output (Threshold Trigger)
• AO: Analog Output (Light Intensity Value)

🔌 Sample Arduino Connection:

Connections:

• VCC → 5V
• GND → GND
• AO → A0
• DO → D2

Arduino Code Example:

int sensorAnalog = A0;
int sensorDigital = 2;
int led = 13;

void setup() {
  pinMode(sensorDigital, INPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int lightLevel = analogRead(sensorAnalog);
  int lightState = digitalRead(sensorDigital);
  
  Serial.print("Light Level: ");
  Serial.println(lightLevel);
  
  if (lightState == LOW) {
    digitalWrite(led, HIGH);
  } else {
    digitalWrite(led, LOW);
  }
  delay(500);
}

🚀 Why Choose Our LDR Sensor Module:

• ✅ 100% Tested Before Dispatch
  
• ✅ Accurate & Stable Light Detection
  
• ✅ Compatible with All Arduino Boards
  
• ✅ Perfect for Students & Hobbyists
  
• ✅ Fast Dispatch from Delhi Warehouse
  
• ✅ GST Invoice for All Orders
  
• ✅ Technical Support Available for Setup & Projects

⚠️ Safety & Handling Tips:

• Avoid direct exposure of LDR to intense light sources.
• Keep sensor clean for consistent accuracy.
• Mount module on a stable surface away from vibrations.
• Adjust potentiometer gradually while testing.

🧠 Ideal For:

• 👨🎓 Engineering & Polytechnic Students
  
• 👨💻 IoT & Robotics Enthusiasts
  
• 🏫 Makerspaces & Labs
  
• 🏭 Automation Engineers
  
• 👨🏫 STEM Learning Programs

Package Included:

• 1 X LM393 Optical Photosensitive LDR light sensor module