How to Use IR Qre1113: Examples, Pinouts, and Specs

The IR Qre1113, manufactured by Ziqqucu, is an infrared emitter and detector pair designed for applications requiring object detection, proximity sensing, and remote control systems. This compact and efficient component operates by emitting infrared light and detecting the reflected light from nearby objects, making it ideal for use in robotics, line-following robots, and other automation systems.

• Line-following robots
• Object detection in robotics
• Proximity sensing
• Remote control systems
• Optical encoders

The IR Qre1113 has four pins, as described in the table below:

1. Power Supply: Connect the VCC pin to a regulated power source (2.7V to 5.5V) and the GND pin to the ground of the circuit.
2. Output Signal: The OUT pin provides an analog voltage signal proportional to the amount of reflected infrared light. This signal can be read by an ADC (Analog-to-Digital Converter) on a microcontroller.
3. LED Connection: The LED Cathode pin should be connected to a current-limiting resistor and then to ground. The resistor value can be calculated based on the desired current through the LED.

• Optimal Distance: The IR Qre1113 works best at a distance of 0.2mm to 3mm from the reflective surface. Ensure the object is within this range for accurate detection.
• Ambient Light: Minimize ambient light interference by shielding the sensor or using it in controlled lighting conditions.
• Current Limiting Resistor: Use a resistor to limit the current through the infrared LED to prevent damage. For example, with a 5V supply and a desired current of 20mA, use a 220Ω resistor.
• Surface Reflectivity: The sensor's output depends on the reflectivity of the surface. Highly reflective surfaces will produce stronger signals.

Below is an example of how to connect and use the IR Qre1113 with an Arduino UNO:

• VCC: Connect to the 5V pin on the Arduino.
• GND: Connect to the GND pin on the Arduino.
• OUT: Connect to an analog input pin (e.g., A0) on the Arduino.
• LED Cathode: Connect to GND through a 220Ω resistor.

// IR Qre1113 Example Code for Arduino UNO
// This code reads the analog output of the IR Qre1113 and prints the value
// to the Serial Monitor. Ensure the sensor is connected to pin A0.

const int sensorPin = A0; // Analog pin connected to the OUT pin of IR Qre1113

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud
  pinMode(sensorPin, INPUT); // Set the sensor pin as input
}

void loop() {
  int sensorValue = analogRead(sensorPin); // Read the analog value from the sensor
  Serial.print("Sensor Value: "); // Print label for clarity
  Serial.println(sensorValue); // Print the sensor value to the Serial Monitor
  delay(500); // Wait for 500ms before the next reading
}

• Open the Serial Monitor in the Arduino IDE to view the sensor readings.
• Adjust the delay in the loop() function as needed for your application.

1. Can the IR Qre1113 detect transparent objects?
   No, the sensor is not effective at detecting transparent objects as they do not reflect sufficient infrared light.

2. What is the maximum detection range?
   The optimal detection range is 0.2mm to 3mm. Beyond this range, the output signal may become unreliable.

3. Can I use the IR Qre1113 with a 3.3V microcontroller?
   Yes, the IR Qre1113 operates within a voltage range of 2.7V to 5.5V, making it compatible with 3.3V systems.

4. How do I improve detection accuracy?
   Use the sensor in a controlled environment with minimal ambient light and ensure the object is within the optimal range.

By following this documentation, you can effectively integrate the IR Qre1113 into your projects for reliable infrared sensing and detection.