IR Obstacle avoidance sensor module Infrared tube module Photoelectric reflectio

Smart car obstacle avoidance sensor module Infrared tube module Photoelectric reflection sensor DESCRIPTION :
The sensor module has strong adaptability to ambient light. It has two infrared emitting and receiving tubes. The emitting tube emits infrared rays of a certain frequency. When the detection direction encounters an obstacle (reflecting surface), the infrared rays are reflected back and received by the receiving tube. After processing by the comparator circuit, the green indicator light will be on, and the signal output interface will output a digital signal (an input signal). The detection distance can be adjusted by the potentiometer knob. The effective distance range is 2 ~ 30cm, and the working voltage is 3.3V-5V. The detection distance of the sensor can be adjusted by a potentiometer, which has the characteristics of low interference, suitable for assembly, and easy to use. It can be widely placed in obstacle avoidance robots, obstacle avoidance trolleys, pipeline counting and black and white line tracking, etc.

1. When the module detects the signal of the obstacle in front, the green indicator on the circuit board lights up, and the OUT port continuously outputs a low-level signal. The detection distance of the module is 2-30cm, the detection angle is 35 °, and the detection distance can pass the potential. Adjust the potentiometer, adjust the potentiometer clockwise, the detection distance increases; adjust the potentiometer counterclockwise, the detection distance decreases. 
2. Active infrared reflection detection of the sensor, so the reflectivity and shape of the target is the key to the detection distance. Among them, the black detection distance is the smallest and the white is the largest; the distance of small area objects is small, and the distance of large area is large. 
3. The output port OUT of the sensor module can be directly connected to the IO port of the single-chip microcomputer,
or it can directly drive a 5V relay; connection mode: VCC-VCC; GND-GND; OUT-IO 
4. The comparator adopts LM393, and the work is stable; 
5. 3-5V DC power supply can be used to power the module. When the power is turned on, the red power indicator lights; 6. With 3mm screw holes, easy to fix and install; 
7. Circuit board size: 3.2CM * 1.4CM 
8. Each module has already adjusted the threshold comparison voltage through the potentiometer before delivery. Please do not adjust the potentiometer arbitrarily under special circumstances.

Module interface description :
1.VCC external 3.3V-5V voltage (can be directly connected to 5v microcontroller and 3.3v microcontroller) 
2.GND External GND 
3.OUT small board digital output interface (0 and 1)

🔹 Key Applications

• Front-mounted obstacle detection on autonomous robots
• Edge and cliff detection on wheeled robots
• Proximity-triggered stop for automated conveyor systems
• Touchless button/switch replacement in HMI interfaces
• Object-present detection on assembly lines
• Automatic door open/close triggering

🔹 Why Choose This Module?

• Adjustable detection range (2–30 cm) via onboard potentiometer
• Clean digital output — no ADC required
• Fast response — real-time collision avoidance capable
• 3.3 V and 5 V compatible — Arduino and ESP32 ready
• Onboard LED indicator — visual status feedback during setup

🔹 Technical Specifications

• Sensing Method: IR LED + photodiode reflectance
• Detection Range: 2 – 30 cm (adjustable)
• Output: Digital (LOW = obstacle detected)
• Operating Voltage: 3.3 V – 5 V DC
• Output Indicator: LED on obstacle detection

🔹 What's Included

1 × IR Obstacle Avoidance Sensor Module

🔹 Pro Tip

💡 Adjust the potentiometer clockwise to increase detection distance, counter-clockwise to decrease. Avoid using in bright sunlight — IR interference can cause false positives. For robot bumper arrays, mount three sensors (left, centre, right) for full front-arc coverage.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.