TCRT5000 IR Sensor Features
This sensor which is mostly used for line tracking, works like motion detection sensors. It is based on TCRT5000 IC. The TCRT5000 is a sensor that emits infrared light continuously. If the transmitted wave is not reflected or is reflected very poorly, the output will be LOW. If you put an object in front of this sensor, the output becomes HIGH.
Note
Black color absorbs the transmitted IR radiation and reflects it very poorly. So the output will be LOW if there is a black object in front of the sensor. But if other colors are placed in front of the sensor, the output becomes HIGH.
when the output is HIGH, the LED turns on.
Other features:
- Detection distance: 1 to 25 mm
- Operating voltage: 5V
- A fixed bolt hole, convenient installation.
- Small PCB size
Download the Datasheet of this sensor here.
TCRT5000 IR Sensor Pinout
This Module has 3 pins:
- VCC: Module power supply – 5V
- GND: Ground
- OUT: Digital output signal
Note
The output is normally LOW. If you bring an object (not black) near to the sensor, the output will be HIGH and LED will turn on.
You can see the pinout of this module in the image below.
Required Material
Hardware component
Software Apps
Interfacing TCRT5000 IR Sensor with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to TCRT5000 sensor. Connect wires accordingly.
Note
We set the values of pins 5 and 6 in the code in a way that the connection wires are no longer needed.
So you can place the module directly on Arduino.
Step 2: Code
Upload the following code to Arduino.
/*
YwRobot-Tracking-Black-White-Line-Module
Made on 07 Feb 2021
by Amir Mohammad Shojaee @ Electropeak
Home
*/
int GND = 5;
int VCC = 6;
int OUT = 7;
void setup() {
// initialize serial communication at 9600 bits per second:
pinMode(GND, OUTPUT);
pinMode(VCC, OUTPUT);
pinMode(OUT, INPUT);
digitalWrite(GND, LOW);
digitalWrite(VCC, HIGH);
Serial.begin(9600);
}
void loop() {
int sensorValue = digitalRead(OUT);
if (sensorValue == 0){
Serial.println("black color");
}
if (sensorValue == 1){
Serial.println("other colors");
}
delay(500);
}
In this program, we set pin 5 and 6 to Low and High so we can use them as the ground and VCC, respectively. And we set pin 7 to digital input and check the sensor output constantly. If this pin is HIGH, it means that there is no black object in front of the sensor, but if we place a black object or nothing in front of it, the output becomes LOW.
We place different colors, including black, in front of the sensor. Only when the color is not black, the output will be HIGH and the phrase “other colors” is displayed:
