Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Detection Range	2cm - 30cm (Adjustable)
Output Signal	Digital Switching Output (0 and 1)
Comparator Chip	LM393
PCB Dimensions	32mm x 14mm
Mounting Hole Diameter	3mm
Indicator LEDs	Power LED and Output Status LED
Potentiometer	Multi-turn Sensitivity Adjustment
Compatible Platforms	Arduino, Raspberry Pi, STM32, ESP32
Application	Line Tracking, Obstacle Avoidance, Counting

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

Great for learning embedded systems

As someone new to electronics, this module made it easy to understand digital inputs. The onboard LEDs give immediate visual feedback which helps a lot during debugging.

Anonymous

Mar 20, 2026

Rating: 4/5

Good quality, easy to wire

Very straightforward to connect to my microcontroller. The output is clean and responsive. I deducted one star because the included pins were slightly bent, but nothing a quick fix couldn't solve.

Anonymous

Mar 20, 2026

Rating: 5/5

Excellent obstacle avoidance performance

I was worried about sunlight interference, but these hold up well indoors and even in shaded outdoor areas. The detection range is consistent once calibrated.

Anonymous

Mar 20, 2026

Rating: 5/5

Bought 20 for our school club

We used these for a student competition. Every single module worked out of the box. They are robust enough to handle being mounted and remounted by beginners repeatedly.

Anonymous

Mar 14, 2026

Rating: 5/5

Perfect for my Arduino robot car

These sensors work flawlessly for line tracking. The sensitivity adjustment is very precise, allowing me to tune it perfectly for black tape on a white floor. Great value for the price.

Anonymous

Mar 06, 2026

Rating: 4/5

Solid basic sensor

Does exactly what it says on the tin. It's a standard reflective IR pair. Don't expect long-range detection, but for close-proximity tasks like line following, it is ideal.

5 FAQ

Q: Can I use this underwater?

A: No, this module is not waterproof. The electronic components and open PCB design will be damaged by water. It is designed for dry, indoor, or protected outdoor use only.

Q: What is the maximum current draw for this module?

A: The typical current consumption is around 20mA when the IR LED is active. Please ensure your microcontroller pin or power source can supply at least 30mA to be safe.

Q: Can this sensor detect clear glass objects?

A: Infrared reflective sensors generally struggle with transparent materials like clear glass because the IR light passes through rather than reflecting back. It works best on opaque surfaces.

Q: How do I adjust the detection distance?

A: There is a blue potentiometer on the board. Use a small screwdriver to turn it clockwise to increase sensitivity (longer range) or counter-clockwise to decrease it. Test while moving an object toward the sensor.

Q: Is the output compatible with 3.3V logic boards like ESP32?

A: Yes, the module operates between 3.3V and 5V. The digital output is compatible with 3.3V logic levels, so you can connect it directly to an ESP32 or Raspberry Pi GPIO.

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