Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching Output (0 and 1) |
| Detection Distance | 1mm - 8mm (adjustable via potentiometer) |
| Comparator Chip | LM393 |
| PCB Dimensions | 32mm x 14mm |
| Mounting Hole Diameter | 3mm |
| Indicator LEDs | Power LED and Output Status LED |
| Sensitivity Adjustment | Blue Potentiometer |
| Compatible Platforms | Arduino, Raspberry Pi, STM32, ESP32 |
| Application | Line following robots, obstacle avoidance, counting modules |
Anonymous
Mar 25, 2026
Rating: 4/5
Good value but needs calibration
Great little module for the price. It took a bit of time to get the potentiometer adjusted correctly for ambient light conditions, but once set, it reliably detects the black line on white paper. Just ensure you have a stable 5V supply.
Anonymous
Mar 19, 2026
Rating: 5/5
Exceeded expectations
I was worried about the detection consistency, but these modules are surprisingly robust. The LM393 comparator provides a clean signal transition. I've been running my robot for hours without any missed lines.
Anonymous
Mar 13, 2026
Rating: 5/5
Perfect for my Arduino line follower
This sensor works exactly as described. The sensitivity adjustment is very responsive, allowing me to fine-tune the detection range for different surface colors. I used four of these for a line-following car project, and the response time is excellent.
Anonymous
Mar 09, 2026
Rating: 5/5
Compact and effective
The size is perfect for small robot chassis. The IR emission and reception are well-shielded to prevent cross-talk between adjacent sensors. Highly recommended for beginner robotics projects.
Anonymous
Mar 08, 2026
Rating: 4/5
Works well in controlled lighting
Performance is solid indoors. I noticed some interference when testing near bright windows due to sunlight containing IR, but adding a simple tube shield solved the issue. Overall, a great component for the cost.
Anonymous
Mar 05, 2026
Rating: 5/5
Reliable and easy to interface
We bought a bulk pack for our university lab. Students find them very easy to wire up to microcontrollers. The digital output makes coding straightforward without needing complex analog processing.
Q: Does this work on glass surfaces?
A: Infrared sensors generally struggle with transparent surfaces like glass because the IR light passes through rather than reflecting back. It is best used on opaque surfaces such as paper, wood, or plastic.
Q: What is the maximum current draw for one module?
A: Typically, a single module draws around 10mA to 20mA depending on the brightness of the IR LED, which is influenced by the voltage supply and ambient conditions. It is safe to power multiple units directly from an Arduino 5V pin.
Q: Is the output analog or digital?
A: The board provides a digital switching output (HIGH/LOW) via the LM393 comparator. However, if you need analog data, the raw signal is often accessible on specific breakout versions, but this standard module outputs digital signals only.
Q: Can this sensor detect objects other than lines, like walls?
A: Yes, while optimized for line tracking, it functions as a proximity sensor. It can detect obstacles within its 1-8mm range, making it suitable for basic obstacle avoidance if mounted facing forward.
Q: How do I adjust the sensitivity?
A: Locate the blue potentiometer on the PCB. Use a small screwdriver to rotate it clockwise to increase sensitivity (detects from further away) or counter-clockwise to decrease it. Test while moving the sensor over your target line to find the sweet spot.
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