E18-D80NK Infrared Sensor Module

📌 Overview
The E18-D80NK Infrared Sensor Module is a photoelectric proximity sensor used to detect objects without physical contact.
👉 It is widely used in:
🤖 Robotics (obstacle avoidance)
🏭 Automation systems
🚪 Object detection systems
🧠 Working Principle
The sensor emits infrared (IR) light
When an object comes in front → light reflects back
The receiver detects this reflection
Output changes accordingly
👉 This is called a diffuse reflective photoelectric sensor
📊 Infographic Summary
┌──────────────────────────────┐
│ 🔴 E18-D80NK IR SENSOR │
├──────────────────────────────┤
│ 🎯 Detects: Objects │
│ ⚡ Voltage: 5V DC │
│ 📏 Range: 3–80 cm │
│ 🔌 Output: Digital (NPN) │
│ 🧠 Type: IR Reflective │
│ 🔁 Adjustable distance │
└──────────────────────────────┘
🔌 Pin Configuration
┌──────────────┐
│ E18-D80NK │
├──────────────┤
│ Red → VCC (5V)
│ Green/Blue → GND
│ Yellow/Black → OUT
└──────────────┘
⚙️ Key Specifications
⚡ Operating Voltage: 5V DC
📏 Detection Range: 3 cm – 80 cm (adjustable)
🔌 Output Type: Digital (NPN, Normally Open)
⏱ Response Time: < 2 ms
🔋 Current Consumption: ~25–100 mA
🌡 Operating Temp: -25°C to 55°C
🌟 Key Features
🔴 Long detection range (up to 80 cm)
🎯 Adjustable sensitivity (via screw)
⚡ Fast response
🔧 Easy to mount cylindrical design
💰 Low cost and reliable
🌞 Less affected by ambient light
🔄 Working Logic
Condition
Output
No object
LOW
Object detected
HIGH
(May vary depending on wiring and module type)
🧪 Applications
🤖 Robot obstacle avoidance
🚪 Automatic door systems
📦 Object counting systems
🏭 Conveyor belt detection
🚗 Parking sensors (basic)
🎮 DIY automation projects
🔗 Interfacing
Works with:
🔵 Arduino
📡 ESP32 / ESP8266
🍓 Raspberry Pi
👉 Connect output to a digital input pin
⚠️ Important Notes
⚠️ Detection depends on object color & surface
⚠️ Not good for transparent objects (glass, water)
⚠️ Requires proper alignment for best results
⚠️ High current compared to small IR modules
💬 Real-world tip:
White objects reflect better → longer detection range
🆚 E18-D80NK vs HC-SR04
Feature
E18-D80NK IR Sensor
Ultrasonic (HC-SR04)
Range
3–80 cm
2–400 cm
Accuracy
Medium
High
Speed
Very fast
Moderate
Surface effect
Yes (color matters)
No
Cost
Low
Slightly higher
💡 Pro Tip
For best performance:
Adjust the potentiometer for required range
Use in indoor environments for stability
Combine with microcontroller + buzzer/LED for alerts