Reflective Infrared Obstacle Detector Module with Adjustable 2–30cm Range and TTL Output

Reflective Infrared Obstacle Detector Module with Adjustable 2–30cm Range and TTL Output
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  • Product Code:SQ1428
  • Availability: 1000
  • $0.50
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Tags: reflective infrared sensor, obstacle detector module, IR proximity sensor, TTL obstacle sensor, adjustable IR sensor, Arduino robot sensor, smart car sensor, line tracking sensor, infrared avoidance module, 2-30cm IR sensor

The OBSTACLE-MODULE is a reflective infrared obstacle detector designed for proximity sensing, collision avoidance, and line tracking in robotics and smart-vehicle projects. The module emits infrared light from an onboard emitter and measures the light reflected back from nearby objects by a photodiode receiver. The reflected signal is converted into a clean TTL digital output: the output goes LOW (0) when an obstacle is detected within the set range, and returns HIGH (1) when the path is clear. This active-low behaviour allows the module to be connected directly to the digital input of an Arduino, ESP32, STM32, or any 3.3V/5V microcontroller without additional signal conditioning.

Detection distance is adjustable from approximately 2cm to 30cm using the onboard multi-turn potentiometer. The effective range depends on the colour and reflectivity of the target: white surfaces reflect farthest, while dark or black surfaces reduce the usable distance. The module has an effective detection angle of 35°, giving each sensor a focused forward field of view. A dedicated EN (enable) pin allows the sensor to be switched on or off under logic control: pulling EN to 0 activates the sensor, while 1 disables it, which is useful for power saving or for multiplexing multiple sensors.

The module operates from 3.3V to 5V DC (with a supply range of 3V to 6V per the listing), draws approximately 20mA, and works across a temperature range of -10°C to +50°C. The board measures 50mm × 80mm × 20mm and uses a 4-pin interface (GND, VCC, S, EN). Typical applications include obstacle avoidance in autonomous robots, distance detection for smart cars, black/white line tracking, anti-drop detection, pipeline counting, and liquid-level sensing.

Reflective infrared obstacle detector Application

  1. Obstacle avoidance in autonomous robots
  2. Collision prevention for smart cars and robotic vehicles
  3. Path routing and navigation in complex environments
  4. Distance and obstacle detection for intelligent vehicles
  5. Presence sensing for automatic access-control systems
  6. Industrial automation and obstacle detection
  7. Black/white line tracking for line-following robots
  8. Anti-drop detection, pipeline counting, and liquid-level sensing

Reflective infrared obstacle detector Specifications

  1. Product Model: OBSTACLE-MODULE (listing model: IR-08H V02.45.DC)
  2. Module Type: Reflective infrared obstacle detector
  3. Comparator IC: Not specified by the manufacturer; comparable modules use LM393
  4. Supply Voltage: 3.3V to 5V DC (supply range 3V to 6V per listing)
  5. Operating Current: Approximately 20 mA
  6. Detection Range: 2 cm to 30 cm (adjustable)
  7. Output Signal: TTL digital (LOW = obstacle detected, HIGH = no obstacle)
  8. Detection Angle: 35°
  9. IO Interface: 4-pin: GND, VCC, S, EN
  10. Enable Pin (EN): Active-low: EN = 0 sensor ON; EN = 1 sensor OFF
  11. Sensitivity Adjustment: Multi-turn potentiometer
  12. Operating Temperature: -10°C to +50°C
  13. Board Dimensions: 50 mm × 80 mm × 20 mm

Features

  1. Reflective infrared sensing for obstacle and proximity detection
  2. Adjustable detection range from 2cm to 30cm via multi-turn potentiometer
  3. TTL digital output with active-low behaviour (LOW on detection)
  4. Wide 3.3V to 5V DC supply compatibility (3V–6V range per listing)
  5. Low operating current of approximately 20mA
  6. 35° effective detection angle for focused forward sensing
  7. Dedicated EN pin for logic-controlled on/off switching
  8. 4-pin interface (GND, VCC, S, EN) for simple wiring
  9. Works with Arduino, ESP32, STM32, and other 3.3V/5V microcontrollers
  10. Operating temperature range of -10°C to +50°C
  11. Suitable for obstacle avoidance, line tracking, and anti-drop detection
  12. Compact board with mounting provision for robot chassis integration
  13. Adjustable sensitivity accommodates different surface colours and reflectivity
  14. Reliable performance in smart-car and industrial automation projects
Electrical Parameters
Voltage DC 3.3-5V
Current 20mA
Physical Parameters
Size 45mm x 11mm

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