3-Channel Path Tracing IR Sensor Module

3-Channel Path Tracing IR Sensor Module
The module utilizes three TCRT5000 infrared reflective pairs. Each contains an IR emitter and a phototransistor. By measuring how much IR light bounces back from the floor, the module can instantly distinguish between a dark line (which absorbs IR) and a light-colored floor (which reflects IR).

Why it’s the Beginner’s Choice:
• Simple "Three-State" Logic: Your robot only needs to know three things:
1. Center sensor active: Drive straight.
2. Left sensor active: Turn left.
3. Right sensor active: Turn right.
• Integrated Comparison: The module features an onboard Schmitt Trigger (comparator) circuit. This means you don't have to deal with messy analog values; the module sends a clean HIGH or LOW digital signal directly to your Arduino.
• Low Pin Requirement: It only uses three digital pins on your microcontroller, leaving plenty of space for motor drivers, ultrasonic sensors, or Bluetooth modules.
• Visual Feedback: Each of the three sensors has a dedicated LED on the back of the PCB. You can manually slide the robot over a line to verify it's working before you ever write a line of code.

Technical Capabilities:
• Operating Voltage: 3.3V to 5V (Works seamlessly with Arduino Uno, ESP32, and Raspberry Pi).
• Signal Stability: The filtering architecture is designed to ignore standard indoor visible light, preventing your robot from "getting confused" by overhead lamps.
• Detection Distance: Best results are achieved when the sensor is mounted 5mm to 15mm from the ground.