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)
Indicator LED	Power and Detection Status LEDs
Comparator Chip	LM393 Wide Voltage Comparator
Sensitivity Adjustment	Potentiometer for Fine Tuning
Mounting Compatibility	Compatible with LEGO Technic Pins
PCB Dimensions	32mm x 14mm x 8mm
Application Type	Line Tracking and Obstacle Avoidance
Package Contents	2x Infrared Sensor Modules

6 reviews

Anonymous

Mar 22, 2026

Rating: 5/5

Great addition to our smart car kit

My son and I used these to upgrade his existing toy car into an autonomous vehicle. The response time is fast enough to stop before hitting walls. The LEDs provide good visual feedback during debugging.

Anonymous

Mar 10, 2026

Rating: 5/5

Perfect for my Arduino car project

These sensors work flawlessly for line tracking. The sensitivity adjustment is very responsive, allowing me to calibrate it perfectly for black tape on a white floor. Great value for a pair.

Anonymous

Mar 08, 2026

Rating: 5/5

LEGO compatible as advertised

I was skeptical about the LEGO compatibility claim, but the mounting holes align perfectly with standard Technic pins. It made building a custom sensor array much faster than designing 3D printed brackets.

Anonymous

Mar 08, 2026

Rating: 4/5

Good for classroom kits

Bought these for our high school robotics club. They are durable and easy to wire up. The only minor issue is that direct sunlight can interfere with the reading, but indoors they are excellent.

Anonymous

Mar 08, 2026

Rating: 3/5

Works well but range is limited

The sensor is reliable for close-range obstacle avoidance, but don't expect it to detect objects further than 25cm reliably. For the price, it's acceptable, just manage your expectations on range.

Anonymous

Mar 05, 2026

Rating: 5/5

Easy to integrate

Very straightforward to connect to an ESP32. The digital output makes coding simple; no need for complex analog reading logic unless you want to measure distance specifically. Highly recommended for beginners.

5 FAQ

Q: How do I adjust the detection distance?

A: There is a blue potentiometer on the back of the PCB. Use a small screwdriver to turn it clockwise to increase sensitivity (range) or counter-clockwise to decrease it while testing with your target object.

Q: Is this compatible with Raspberry Pi GPIO?

A: Yes, since the module operates at 3.3V to 5V and provides a digital signal, it is fully compatible with Raspberry Pi GPIO pins. Just ensure you connect the VCC to the 3.3V or 5V pin accordingly.

Q: Can these sensors detect clear glass or transparent obstacles?

A: Infrared reflective sensors generally struggle with transparent objects like glass because the IR light passes through rather than reflecting back. They are best suited for opaque obstacles.

Q: What is the current consumption of each module?

A: Each module typically consumes around 10mA to 20mA when active, depending on the brightness of the IR LED and the state of the indicator LEDs.

Q: Are the pin headers pre-soldered?

A: No, the modules usually come with unsoldered pin headers to allow for flexible wiring options. You will need to solder them yourself or use jumper wires with friction fit if the holes are tight.

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