Infrared Obstacle Avoidance IR Sensor Module (Active Low)
The Infrared Obstacle Avoidance IR Sensor Module (Active Low) is a compact and efficient sensor designed
to detect obstacles using infrared light. It features a pair of IR transmitting and receiving tubes, making it ideal
for robotics, automation, and smart vehicle applications.
When an object comes within range, the emitted infrared light reflects back to the receiver.
The onboard comparator circuit processes the signal and triggers the output pin
with a low-level signal, while the onboard indicator LED lights up to show detection.
⚙️ Key Features
- ✅ Easy to use and integrate with Arduino, Raspberry Pi, AVR, PIC, and other microcontrollers
- ✅ Onboard detection LED indicator for real-time feedback
- ✅ Adjustable sensitivity via onboard preset potentiometer
- ✅ Effective detection range: 2 cm to 80 cm (adjustable)
- ✅ Active-Low digital output (LOW signal when obstacle detected)
- ✅ Works with 3.3V to 5V logic levels
- ✅ Compact and lightweight module design
- ✅ Ideal for obstacle detection in robots, vehicles, and automation systems
Technical Specifications
| Operating Voltage | 3.3V – 5V DC |
| Output Type | Digital (Active Low) |
| Detection Range | 2 cm – 80 cm (adjustable) |
| Indicator LED | ON when obstacle detected |
| Interface | 3-pin (VCC, GND, OUT) |
| Signal Processing | Onboard comparator circuit |
| Output Voltage | High: 5V, Low: 0V |
| Operating Current | 20 mA (typical) |
| Module Dimensions | Approx. 4.8 cm × 1.4 cm × 1.3 cm |
How It Works
The IR sensor continuously emits infrared light through its transmitter. When an object or obstacle comes close,
the light reflects back to the receiver. The onboard comparator checks the signal strength, and if it crosses the set
threshold, the output pin goes LOW and the indicator LED turns ON.
The sensitivity can be fine-tuned using the onboard potentiometer to adjust detection range
depending on environmental lighting or material reflectivity.
Pin Configuration
| Pin | Description |
|---|---|
| VCC | Power Supply (3.3V – 5V) |
| GND | Ground |
| OUT | Digital Output (LOW = Obstacle Detected) |
Applications
- Obstacle detection for mobile robots and cars
- Smart automation systems
- Line-following and collision-avoidance robots
- Proximity and distance sensing
- Object counter systems
- DIY electronics and STEM learning projects
Package Includes
- 1 × Infrared Obstacle Avoidance IR Sensor Module (Active Low)
Tip: For best accuracy, avoid direct sunlight or highly reflective surfaces during operation, as they may interfere with IR detection.
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