Description

The Infrared Obstacle Avoidance IR Sensor Module is an essential proximity detection device used in autonomous 2WD/4WD robotic chassis, smart collision prevention systems, and industrial proximity switches. It consists of a focused IR LED emitter that transmits invisible light pulses and an IR receiver photodiode configured to capture reflected infrared light.

When an object enters the sensor’s field of view (~35° cone), infrared light reflects back into the receiver tube. The onboard LM393 differential comparator evaluates the signal against a user-configured threshold set via the onboard trimmer potentiometer. When an obstacle is detected, the OUT pin switches from HIGH (VCC) to LOW (GND), and the onboard green indicator LED lights up instantly.

Technical Specifications

Pinout Configuration

The module features a straightforward 3-pin connection interface:

Basic Arduino Wiring & Example Code

Wiring Diagram

• VCC ➔ Arduino 5V (or 3.3V)

• GND ➔ Arduino GND

• OUT ➔ Arduino Digital Pin 7

// Active Low IR Obstacle Avoidance Sensor Interfacing
const int obstacleSensorPin = 7; // OUT pin connected to Digital Pin 7

void setup() {
  pinMode(obstacleSensorPin, INPUT);
  Serial.begin(9600);
  Serial.println("IR Obstacle Avoidance Sensor Initialized.");
}

void loop() {
  int sensorState = digitalRead(obstacleSensorPin);

  // Active Low Logic: LOW indicates an obstacle is present
  if (sensorState == LOW) {
    Serial.println("WARNING: Obstacle Detected!");
  } else {
    Serial.println("Status: Path Clear");
  }

  delay(150); // Small delay for stable monitoring
}

Key Features & Highlights

• Active Low Digital Logic: Simplifies microcontroller interrupt programming—directly triggers LOW-level logic routines during obstacle events.

• Onboard Potentiometer Trimmer: Easily adjust sensing distance from 2 cm to 30 cm to suit distinct ambient lighting and chassis mounting depths.

• Dual LED Indicators: Power LED confirms active power rail, while the detection LED provides immediate visual confirmation during debugging.

• Compact & Lightweight: Small form factor allows smooth mounting on front bumpers, side panels, or mini robot platforms without adding significant weight.

Common Applications

• Collision avoidance for 2WD/4WD smart cars and mobile robots.

• Touchless automatic hand sanitizers, faucets, and door mechanisms.

• Object counting on conveyor belts and material handling tracks.

• Edge detection and cliff sensing for robotic vacuum cleaners.

What’s Included in the Box

• 1 × Infrared Obstacle Avoidance IR Sensor Module (Active Low)

Why Buy From Aryabot?

• 100% Quality Hardware: Assembled using durable LM393 ICs, high-sensitivity photodiode tubes, and double-sided glass-fiber FR-4 PCBs.

• Tested & Benchmarked: Pre-tested for optical response time, potentiometer threshold range, and logic switching accuracy.

• GST Invoice Provided: Tax-compliant B2B invoices generated for commercial deployments, educational institutions, and research labs.

• Pan-India Express Dispatch: Fast order processing and reliable direct delivery from our Noida fulfillment facility.