The Optical Infrared Reflective Sensor Module is a versatile line tracking sensor that uses an IR transmitter and receiver pair to detect reflective surfaces. Designed primarily for robotics, it allows a robot to follow a reflective line on the floor with reliable detection. The module outputs a digital signal that goes LOW when a reflective surface (like white tape) is detected and remains HIGH when over a dark or non-reflective surface. With an onboard LM393 comparator, adjustable sensitivity, and indicator LED, this module is easy to integrate with microcontrollers such as Arduino and STM32. It is widely used for line-following robots, obstacle detection, and general reflective object sensing applications. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
Infrared transmitter and receiver pair for reflection detection.
Adjustable sensitivity using onboard 10K potentiometer.
Digital output: HIGH (no reflection) / LOW (reflection detected).
Onboard LM393 voltage comparator for reliable detection.
Detection range: ~1″ at 5V, ~0.6″ at 3.3V.
Integrated LED indicator for detection status.
Operating voltage: 3.0V – 5V.
Compact design with mounting holes for easy installation.
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Applications:
Line-following robots and robotic competitions.
Obstacle and edge detection in small robots.
Reflective object sensing in automation projects.
Position detection in DIY electronics.
Educational robotics and embedded system experiments.
Motion detection with reflective objects.
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| General Specifications |
| Sensor Type | Infrared reflective (IR LED + receiver) |
| Comparator | LM393 |
| Operating Voltage | 3.0V – 5V |
| Detection Range | ~1″ at 5V, ~0.6″ at 3.3V |
| Sensitivity Adjustment | 10K potentiometer |
| Output Logic | HIGH (no reflection) / LOW (reflection detected) |
| Indicator LED | Onboard (lights up when reflective surface detected) |
| Mounting Holes | 2 large holes for easy installation |
| Shipment Weight | 0.0032 kg |
| Shipment Dimensions | 5 × 2 × 2 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
Module Connections
There is a 3-pin header on the assembly for making connections. There are a couple of different labeling schemes used on this header.
1 x 3 Header
- GND / G = Ground
- Vcc / V+ =3.0 to 5V (5V gives greatest range)
- OUT / S = Signal output, connects to digital input pin on uC.
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OUR EVALUATION RESULTS:
This is a commonly used module for basic robotic line tracking experiments and is a good way to get started with basic robotic movement experiments as it is relatively straightforward to read the sensors and modify direction based on the feedback received. These modules can sometimes find use in other applications such as keeping the detector stationary and detecting when a reflective object passes in front of the sensor.
The board has two large holes that can be used for mounting if desired.
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Package Includes:
1 x Optical Infrared Reflective Sensor Module
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