Description
Key Features of Smart Car Robot Sensor Module Kit HW-201
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Infrared reflective obstacle detection technology
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Compact and lightweight PCB design
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Wide operating voltage range (3.3V–5V)
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Adjustable detection sensitivity
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Stable digital output signal
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LM393 onboard comparator for accurate detection
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Simple 3-wire interface (VCC, GND, OUT)
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Ideal for smart car robots and obstacle avoidance systems
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Suitable for Arduino, ESP8266, ESP32, and other controllers
echnical Specifications
| Parameter | Specification |
|---|---|
| Model | HW-201 / MH-B |
| Sensor Type | IR Reflective Obstacle Avoidance Sensor |
| Input Voltage | 3.3V – 5V DC |
| Detection Distance | 2 – 30 cm |
| Detection Angle | 35° |
| Comparator IC | LM393 |
| Output Type | Digital |
| Connection | VCC → VCC, GND → GND, OUT → IO |
| Board Size | 3.2 cm × 1.4 cm |
| Module Type | 3-Wire Reflective Sensor |
| Application | Obstacle Avoidance |
| Use | Electronics, Robotics |
Compatibility & Integration
The Smart Car Robot Sensor Module Kit HW-201 IR Infrared Obstacle Avoidance Sensor is compatible with:
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Arduino UNO / Nano / Mega
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ESP8266 NodeMCU
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ESP32 development boards
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Raspberry Pi (with level shifting if required)
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Smart car robot controllers
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Robotics kits and DIY automation boards
The simple 3-wire interface allows fast installation without additional components.
Common Applications
This IR obstacle avoidance sensor module is widely used in:
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Smart car robots
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Obstacle avoidance robots
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Line follower and maze-solving robots
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DIY robotics projects
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Automation prototypes
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Collision detection systems
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Educational robotics kits
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College and university lab experiments
Its compact size makes it ideal for tight-space robotic designs.
Ideal for Education & Training
The HW-201 IR Infrared Obstacle Avoidance Sensor is a favorite in:
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Engineering colleges
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Robotics workshops
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STEM learning programs
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Beginner Arduino training
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School-level robotics competitions
Students can easily understand obstacle detection logic using this module.




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