Line Follower 1 Channel Infrared Tracking Detection Sensor On the Front TCRT5000 With 1 Pot

Features

• Uses a TCRT5000 infrared reflective optical sensor
• Designed for line tracking and surface detection applications
• Digital output for direct connection to a microcontroller
• Adjustable detection sensitivity using an onboard potentiometer
• Typically outputs LOW when detecting a dark or black surface
• Typically outputs HIGH when detecting a light or white surface
• Infrared detection method helps detect differences in surface reflectivity
• Fast response suitable for moving robots
• Built-in indicator LED for visual status indication
• Pre-drilled mounting hole for easy installation
• Compact design suitable for robotics projects
• Compatible with Arduino and other microcontrollers
• No Arduino library required

Principle of Operation

The module operates using the reflective infrared sensing principle. The infrared LED continuously emits infrared light toward the surface in front of the sensor. The TCRT5000 phototransistor detects the amount of infrared light reflected back from the surface.

A light or white surface generally reflects more infrared light, while a dark or black surface reflects less. The onboard comparator circuit processes the reflected light level and produces a digital output signal. The onboard potentiometer allows the switching threshold to be adjusted. This is useful because the reflected infrared level can vary depending on the distance between the sensor and the surface, the material being detected, and ambient lighting conditions.

In a line-following robot, the sensor is usually mounted facing downward. As the robot moves, the microcontroller reads the sensor output and adjusts the motors according to whether the sensor detects the line or the surrounding surface.

Applications

• Line-following robots
• Educational robotics projects
• Surface and contrast detection
• Path tracking systems
• Simple object and proximity detection projects
• DIY automation projects
• Position detection systems
• Arduino and microcontroller experiments

Pinout

The TCRT5000 line follower module uses a simple three-pin interface.

Wiring

The sensor can be connected directly to an Arduino using the following example wiring.

Arduino Test Code

No additional library is required. The following code reads the digital output from the sensor connected to Arduino digital pin D7 and displays the result in the Serial Monitor.

const int digital_pin = 7;

void setup() {
  Serial.begin(9600);
  pinMode(digital_pin, INPUT);
}

void loop() {
  Serial.print("Digital Reading = ");
  Serial.println(digitalRead(digital_pin));

  delay(1000);
}

Specifications

Resources

• TCRT5000 Line Tracking Module Tutorial: https://diyi0t.com/tcrt5000-line-tracking-module-arduino-esp8266-esp32/