HY-SRF05 Ultrasonic Range Finder Module

The HY-SRF05 Ultrasonic Range Finder Module is a high-precision sensor designed for accurate distance measurement and object detection. With a measuring range of 2cm to 450cm (15 feet) and an accuracy of ±2mm, this module operates at 40kHz ultrasonic frequency, making it immune to ambient light or reflective surfaces that often affect IR sensors. Compared to the widely used HC-SR04, the HY-SRF05 offers improved stability and precision. Its ±15° detection angle provides reliable obstacle detection, making it perfect for robotic vehicles, automation projects, and proximity sensing applications. Easy to interface with Arduino, Raspberry Pi, and other microcontrollers, it is an essential module for DIY robotics and embedded projects. Featured By RoboticsBD.

Product Images are shown for illustrative purposes only and may differ from the actual product.

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Features:

1. Extended Range: Detects objects from 2cm up to 450cm (15 feet).

2. High Accuracy: Provides measurements with ±2mm precision.

3. Wide Coverage: ±15° field of view for broader detection area.

4. Stable Performance: Immune to light interference unlike IR sensors.

5. Easy Interfacing: Works with Arduino, Raspberry Pi, and most microcontrollers.

6. Robust Design: Improved precision over HC-SR04 with similar functionality.

7. Simple Operation: Triggered by a 10μs pulse and outputs echo pulse for distance calculation.

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Applications:

1. Robotics Navigation: Used in obstacle avoidance and autonomous vehicle guidance.

2. Security Systems: Detects presence or movement of objects within range.

3. Smart Automation: Useful in parking sensors, proximity detection, and level measurement.

4. DIY Projects: Perfect for hobbyists building interactive or sensing devices.

5. Educational Use: Great for learning microcontroller programming and sensor integration.

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Please allow 5% measuring deviation due to manual measurement.

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Documentation:

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Module Connections:

There is a 5-pin header on the assembly.  The GND pin is connected to the system ground and the Vcc pin is connected to 5V.  The TRIG pin is an input pin on which a 10uSec pulse is applied to start the measurement cycle.  The ECHO pin is an output pin that is held HIGH for the duration of the time from when the module sends a 40KHz pulse out until it receives the echo back.  The OUT pin is not used.

1 x 5 Header

VCC –   Connect to 5V.

TRIG –   Trigger Input – Connect to any digital output pin on MCU.  A 10uSec or wider pulse starts a measurement cycle

ECHO –  Echo Output – Connect to any digital input pin on MCU.  This pin is held high for the duration of the the measurement cycle.

OUT –    Not used

GND –  Connect to system ground.  This ground needs to be in common with the MCU.

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OUR EVALUATION RESULTS:

This is a commonly used module for obstacle detection and basic range finding.  These are much more capable than the basic IR obstacle avoidance sensors that come in sensor kits and are highly recommended if you are building a motorized robotic car and want to implement a nicely capable obstacle avoidance system or just want to measure distance or presence of an object in front of the sensor for some other reason.  The module has a built-in small microprocessor which does all the heavy lifting of managing the ultrasonic sensors.

A similar sensor module that takes care of the of echo timing and temperature measurement for you is the US-100 as shown down below.

The program below implements a basic setup where the  measured range is displayed in centimeters, inches and feet.  Since the speed of sound varies with the temperature, for maximum accuracy the temperature can be measured and used in the calculation, so this is broken out in the code below but defaults to 20C.  It would be straight forward for instance to implement a DS18B20 or LM35 temperature sensor so that the actual temperature can be measured and used in the calculation.


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Package Includes:

1 x HY-SRF05 Ultrasonic Range Finder Module

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