SKU: SENS-1842
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Waveshare Infrared Reflective Sensor Module - Digital/Analog Output

₹639.00 (Inclusive of all taxes)
Out of Stock

The Waveshare Infrared Reflective Sensor Module is a versatile 3.3V/5V-compatible optical sensor featuring both digital and analog outputs, ideal for Arduino, Raspberry Pi, and robotics projects. It provides non-contact detection of objects and surface reflectivity within a 0-30 mm range.

Features

  • Dual digital and analog output signals for flexible system integration.
  • Wide operating voltage range from 3.0V to 5.3V for compatibility with 3.3V and 5V logic systems.
  • Adjustable detection sensitivity via on-board potentiometer.
  • Compact design with a 35° viewing angle and integrated IR LED for precise reflective sensing.
  • Includes a wide-range voltage comparator (LM393) for stable signal conditioning.

Out of stock

Description

This module integrates an infrared transmitter (IR LED) and receiver (phototransistor) to perform reflective object detection. The IR LED emits light at a typical wavelength of 830-950nm, which reflects off surfaces and is captured by the receiver. The intensity of the reflected signal is conditioned by the onboard LM393 comparator, providing a clean digital output, while the raw analog signal is also accessible for precise reflectivity measurement.

Designed for indoor use to avoid interference from ambient sunlight, the sensor is commonly employed in robotics for line tracking and obstacle avoidance. Its compact PCB includes a 3mm mounting hole for easy installation. The detection range is influenced by the color and reflectivity of the target surface, with white objects providing the maximum range of up to 30 cm.

Key Features

  • Reflective infrared transceiver with integrated IR LED and phototransistor.
  • On-board LM393 voltage comparator ensures robust digital signal output.
  • User-adjustable sensitivity via a precision potentiometer.
  • Dual-output interface: digital (TTL) and analog for maximum application flexibility.
  • Compact PCB footprint (39mm x 15.5mm) with standard 3mm mounting hole.
  • Optimized 35° viewing angle for focused detection.
  • High-value build suitable for prototyping and educational robotics.

Applications

  • Robotics obstacle avoidance and proximity detection.
  • Line-following robots for black and white surface tracking.
  • Industrial pipeline object counting and presence detection.
  • Proximity sensing in automated guided vehicles (AGVs).
  • Reflectivity-based sorting and material detection systems.

Technical Specifications

Operating Voltage3.0V - 5.3V
Detection Range0 - 30 mm (up to 30 cm for highly reflective surfaces)
Viewing Angle35°
Output InterfaceDigital (Dout), Analog (Aout), GND, VCC
Core ICLM393 Voltage Comparator
Mounting Hole Diameter3 mm
PCB Dimensions (L x W)39 mm x 15.5 mm
Primary Wavelength830 nm - 950 nm
Recommended UseIndoor applications

Frequently Asked Questions

What is the operating voltage range for this IR reflective sensor?

The module operates from 3.0V to 5.3V DC, making it directly compatible with both 3.3V logic systems (like Raspberry Pi, ESP32) and 5V systems (like most Arduino boards). Ensure your power supply is within this range for stable operation.

How do the digital and analog outputs work, and which should I use?

The digital output (Dout) provides a clean TTL-high or TTL-low signal via the onboard LM393 comparator, triggered when reflectivity crosses the adjustable threshold—ideal for simple detection. The analog output (Aout) provides a variable voltage proportional to the reflected IR intensity, useful for measuring surface reflectivity or precise distance estimation.

How do I adjust the sensor's detection sensitivity?

Sensitivity is adjusted via the blue potentiometer on the module. Turning it clockwise increases sensitivity (detects objects at a greater distance or lower reflectivity). Fine-tune it while observing the output signal or LED indicator to match your specific application and target surface.

What factors affect the maximum detection range?

The detection range is highly dependent on the color and reflectivity of the target surface. White, reflective surfaces can be detected up to 30 cm away, while dark, non-reflective surfaces significantly reduce the effective range. Ambient infrared light (e.g., sunlight) can also interfere, so indoor use is recommended.

Can this sensor be used for line following on a black surface?

Yes, it is commonly used for black-and-white line tracking. The analog output is particularly useful, as the voltage will be higher when the IR light reflects off a white line and lower when absorbed by a black surface. This analog reading allows for precise line-center detection in robotic applications.

Package Includes

  • 1 x Waveshare Infrared Reflective Sensor Module

Additional Information

Weight 0.01 kg
Dimensions 5 × 4 × 1 cm