Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Detection Range | 2cm - 40cm (Adjustable) |
| Output Signal | Digital Switching Output (0 and 1) |
| Comparator Chip | LM393 |
| PCB Dimensions | 32mm x 14mm |
| Mounting Hole Diameter | 3mm |
| Indicator LED | Power and Detection Status |
| Potentiometer | Sensitivity Adjustment Included |
| Application | Line Tracking, Obstacle Avoidance, Counting |
| Package Contents | 1x Sensor Module, 1x Pin Header |
Anonymous
Mar 30, 2026
Rating: 3/5
Works well in controlled light
The sensor is functional, but I noticed it gets a bit erratic under direct sunlight or very bright fluorescent lights. For indoor use or shaded outdoor projects, it performs perfectly fine.
Anonymous
Mar 24, 2026
Rating: 5/5
Compact and reliable
The form factor is small enough to fit on tight chassis designs. The output is clean digital logic levels which interface easily with ESP32 and Raspberry Pi GPIO pins without extra components.
Anonymous
Mar 17, 2026
Rating: 5/5
Essential for line followers
Bought a pack of five for a university project. All units worked out of the box. The contrast between black and white surface recognition is sharp when adjusted correctly. Highly recommended for beginners.
Anonymous
Mar 12, 2026
Rating: 4/5
Good value but needs calibration
Great little module for the price. It took a few minutes to calibrate the sensitivity using the blue potentiometer, especially under bright room lighting. Once tuned, it reliably detects black lines and obstacles.
Anonymous
Mar 11, 2026
Rating: 5/5
Perfect for my Arduino robot car
This sensor works exactly as described. The adjustable potentiometer makes it very easy to set the detection distance precisely. I used two of these for obstacle avoidance on my DIY robot car, and the response time is excellent.
Anonymous
Mar 08, 2026
Rating: 4/5
Great for teaching kids electronics
Used this to teach my son about sensors and automation. It's robust enough to handle some clumsy wiring mistakes. The LED indicators are helpful for debugging logic without a multimeter.
Q: How do I adjust the detection distance?
A: There is a blue trimmer potentiometer on the board. Use a small screwdriver to rotate it clockwise to increase sensitivity (longer range) or counter-clockwise to decrease it. Test with your target object while adjusting.
Q: Can this sensor detect clear glass or transparent objects?
A: This is a reflective infrared sensor, so it relies on light bouncing back from a surface. Transparent objects like clear glass often allow IR light to pass through rather than reflecting it, making detection unreliable. It works best on opaque surfaces.
Q: What is the maximum current draw of this module?
A: The module typically draws around 10mA to 20mA when the IR LED is active and the output transistor is switching. Please ensure your microcontroller pin or power supply can handle this load.
Q: Is the output analog or digital?
A: The output is digital (HIGH/LOW or 1/0). However, since it uses an LM393 comparator, you can technically tap into the analog signal before the comparator if you modify the board, but the standard pins provide a digital switch signal.
Q: Can I use this directly with a 5V Arduino Uno?
A: Yes, absolutely. The module operates on 3.3V to 5V, making it fully compatible with the 5V logic of the Arduino Uno. Connect VCC to 5V, GND to GND, and OUT to any digital input pin.
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