How to Use 4 Channel Infrared Tracing Module: Examples, Pinouts, and Specs

The 4 Channel Infrared Tracing Module is a sensor module designed for line-following robots. It is capable of detecting infrared light to trace lines on a surface, making it an essential component for robotics projects that require precise path-following capabilities. This module is widely used in educational robotics, hobby projects, and automated guided vehicles (AGVs).

1. Power Supply: Connect the VCC pin to a 3.3V or 5V power supply and the GND pin to the ground of your circuit.
2. Outputs: Connect the OUT1, OUT2, OUT3, and OUT4 pins to the digital input pins of your microcontroller (e.g., Arduino UNO).
3. Placement: Place the module such that the infrared sensors are facing the surface with the line to be followed.

• Surface and Line: Ensure the surface is non-reflective and the line is of a contrasting color to the surface for optimal detection.
• Height Adjustment: Adjust the height of the module from the surface to be within the detection range (0.1cm - 3cm).
• Calibration: Calibrate the sensors if necessary to account for varying lighting conditions and surface textures.

// Sample code to read values from the 4 Channel Infrared Tracing Module
// and print them to the Serial Monitor.

const int sensor1Pin = 2; // Connect OUT1 to digital pin 2
const int sensor2Pin = 3; // Connect OUT2 to digital pin 3
const int sensor3Pin = 4; // Connect OUT3 to digital pin 4
const int sensor4Pin = 5; // Connect OUT4 to digital pin 5

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud rate
  pinMode(sensor1Pin, INPUT); // Set sensor pins as input
  pinMode(sensor2Pin, INPUT);
  pinMode(sensor3Pin, INPUT);
  pinMode(sensor4Pin, INPUT);
}

void loop() {
  int sensor1Value = digitalRead(sensor1Pin); // Read sensor values
  int sensor2Value = digitalRead(sensor2Pin);
  int sensor3Value = digitalRead(sensor3Pin);
  int sensor4Value = digitalRead(sensor4Pin);

  // Print sensor values to Serial Monitor
  Serial.print("Sensor 1: ");
  Serial.print(sensor1Value);
  Serial.print(" | Sensor 2: ");
  Serial.print(sensor2Value);
  Serial.print(" | Sensor 3: ");
  Serial.print(sensor3Value);
  Serial.print(" | Sensor 4: ");
  Serial.println(sensor4Value);

  delay(100); // Small delay to avoid flooding the Serial Monitor
}

1. No Detection: The module does not detect the line.

   • Solution: Ensure the module is powered correctly and the sensors are within the detection range. Check the surface and line contrast.

2. False Positives: The module detects lines where there are none.

   • Solution: Reduce ambient light interference and ensure the surface is non-reflective.

3. Inconsistent Readings: The sensor values fluctuate.

   • Solution: Stabilize the module's height and ensure a consistent surface texture. Calibrate the sensors if necessary.

• Power Supply: Ensure a stable power supply to avoid erratic sensor behavior.
• Wiring: Double-check all connections to ensure they are secure and correct.
• Environment: Minimize external infrared sources and reflective surfaces that may interfere with the sensor readings.

By following this documentation, users can effectively integrate and utilize the 4 Channel Infrared Tracing Module in their line-following robot projects, ensuring accurate and reliable performance.