How to Use Keystudio Obstalcle avoidance IR: Examples, Pinouts, and Specs

The Keystudio Obstacle Avoidance IR sensor module is a compact and efficient device designed to detect obstacles using infrared (IR) light. It emits IR light and measures the reflected signal to determine the presence of nearby objects. This module is widely used in robotics, automation, and other applications requiring object detection and navigation.

• Autonomous robots for obstacle detection and avoidance
• Line-following robots with obstacle detection capabilities
• Smart cars and robotic vehicles
• Proximity detection in automation systems
• Interactive toys and gadgets

The following table outlines the key technical details of the Keystudio Obstacle Avoidance IR sensor module:

The Keystudio Obstacle Avoidance IR sensor module has a 3-pin interface. The pin configuration is as follows:

1. Power the Module: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to the ground of your circuit.
2. Connect the Output: Connect the OUT pin to a digital input pin of your microcontroller (e.g., Arduino UNO).
3. Adjust the Sensitivity: Use the onboard potentiometer to adjust the detection range. Turn clockwise to increase the range and counterclockwise to decrease it.
4. Test the Module: Place an object within the detection range and observe the output signal. The onboard LED will light up when an obstacle is detected.

• Avoid Direct Sunlight: The sensor may not function properly in environments with strong IR interference, such as direct sunlight.
• Mounting Position: Ensure the sensor is mounted at an appropriate angle for optimal obstacle detection.
• Power Supply: Use a stable power source to avoid erratic behavior.
• Distance Adjustment: Fine-tune the potentiometer to match the desired detection range for your application.

Below is an example code snippet to use the Keystudio Obstacle Avoidance IR sensor with an Arduino UNO:

// Define the pin connected to the sensor's OUT pin
const int sensorPin = 2; // Digital pin 2
const int ledPin = 13;   // Built-in LED on Arduino UNO

void setup() {
  pinMode(sensorPin, INPUT); // Set sensor pin as input
  pinMode(ledPin, OUTPUT);   // Set LED pin as output
  Serial.begin(9600);        // Initialize serial communication
}

void loop() {
  int sensorValue = digitalRead(sensorPin); // Read the sensor output
  
  if (sensorValue == LOW) {
    // Obstacle detected
    digitalWrite(ledPin, HIGH); // Turn on the LED
    Serial.println("Obstacle detected!");
  } else {
    // No obstacle
    digitalWrite(ledPin, LOW);  // Turn off the LED
    Serial.println("No obstacle.");
  }
  
  delay(100); // Small delay for stability
}

1. The sensor is not detecting obstacles:

   • Ensure the VCC and GND pins are connected properly.
   • Check the potentiometer adjustment and increase the detection range if necessary.
   • Verify that the object is within the sensor's detection angle and range.

2. False detections or erratic behavior:

   • Avoid using the sensor in environments with strong IR interference (e.g., direct sunlight or near other IR sources).
   • Ensure a stable power supply to the module.

3. The onboard LED does not light up:

   • Check the connections and ensure the module is powered correctly.
   • Verify that the object is within the detection range.

Q: Can this sensor detect transparent objects?
A: No, the sensor may not reliably detect transparent or highly reflective objects due to the way IR light is reflected.

Q: Can I use this sensor with a 3.3V microcontroller?
A: Yes, the sensor operates within a voltage range of 3.3V to 5V, making it compatible with 3.3V microcontrollers.

Q: How do I increase the detection range?
A: Use the onboard potentiometer to adjust the detection range. Turn it clockwise to increase the range.

Q: Can I use multiple sensors in the same project?
A: Yes, you can use multiple sensors, but ensure they are positioned to avoid interference between their IR signals.

This concludes the documentation for the Keystudio Obstacle Avoidance IR sensor module.