Digital IR Sensor Module for Arduino – Obstacle & Line Detection (3-Wire)

Key Features:

✅ Dual Functionality – Detects obstacles (2cm–30cm) and black/white lines (for line-following robots).
✅ Adjustable Sensitivity – Fine-tune detection range using the built-in potentiometer.
✅ Digital & Analog Output – Compatible with Arduino (D0 for digital, A0 for analog if supported).
✅ Wide Voltage Support – Works at 3.3V–5V, ideal for microcontrollers like Arduino, ESP8266, Raspberry Pi, and more.
✅ Fast Response – High-speed infrared reflection detection for real-time robotics applications.
✅ Compact & Durable – PCB-mounted design with a TCRT5000 IR sensor (infrared transmitter + phototransistor receiver).

Technical Specifications:

• Operating Voltage: 3.3V–5V DC

• Detection Range: Adjustable (2cm–30cm for obstacles; 0.1mm–10mm for line tracking).

• Output Type: Digital (HIGH/LOW) or Analog (varies by model).

• Response Time: <10ms

• Dimensions: ~30mm x 15mm (varies by manufacturer).

Applications:

🤖 Robotics – Obstacle avoidance, line-following robots, maze solvers.
🚗 Smart Cars – DIY RC cars with collision detection.
🏭 Industrial Automation – Object counting, conveyor belt systems.
🎓 STEM Education – Learn sensors, logic, and coding (Arduino/Python).
🏠 Smart Home Projects – Touchless switches, security systems.

How It Works:

1. The IR transmitter emits infrared light.

2. The phototransistor receiver detects reflected light:

   • Obstacle Mode: Reflects off surfaces → Outputs LOW when an object is near.

   • Line Tracking Mode: Absorbed (black) vs. reflected (white) → Differentiates line colors.

3. Adjust the potentiometer to set sensitivity (e.g., reduce false triggers).