HC-SR04 Ultrasonic Sensor

HC-SR04 Ultrasonic Sensor for Distance Measurement

This is a popular distance measurement module designed for Arduino, robotics and DIY electronics projects. It uses ultrasonic waves to detect objects and determine their distance, making it useful for applications such as obstacle detection, automated systems and distance-monitoring projects.

With a stated measurement range of 2cm to 450cm, the HC-SR04 provides a practical way to add distance sensing to a microcontroller project. Its compact module design makes it easy to integrate into prototypes and experimental circuits.

The sensor is particularly useful for students, electronics hobbyists, robotics enthusiasts and developers building projects that require object detection or distance measurement.

Key Features

2cm–450cm Distance Measurement

The HC-SR04 ultrasonic sensor is designed to measure the distance between the sensor and a detected object within its specified range of 2cm to 450cm.

The module sends an ultrasonic signal and uses the returning echo to determine the distance. A compatible microcontroller can then process the signal and use the measured distance as part of a larger electronic system.

This makes the HC-SR04 useful where a project needs to detect the presence or position of an object without physical contact.

Simple TRIG and ECHO Interface

The module uses separate TRIG and ECHO connections for ultrasonic distance measurement. A compatible microcontroller sends a trigger signal to the sensor, while the echo signal provides the timing information needed to calculate the distance.

This straightforward interface makes the sensor convenient for Arduino and other compatible electronics projects.

Ideal for Arduino & Robotics

The HC-SR04 is widely used in educational electronics and robotics projects because it provides a simple way to introduce distance sensing into a circuit.

It can be incorporated into projects involving:

• Arduino distance measurement
• Obstacle detection
• Robot navigation
• Automatic systems
• Object detection
• Distance-monitoring projects
• DIY electronics
• Robotics experiments
• Electronics learning projects

For more components for your projects, explore our Electronics & Accessories collection.

Common Applications

The HC-SR04 ultrasonic sensor can be used in a variety of prototype and educational applications, including robotic vehicles that need to detect obstacles, electronic systems that monitor object distance, and Arduino projects that display measured distances.

It is also useful when experimenting with sensors and learning how microcontrollers interact with real-world inputs.

For additional information about Arduino-compatible electronics and development, you can explore Arduino’s official documentation.

Technical Specifications

Package Includes

Add Distance Sensing to Your Project

The HC-SR04 ultrasonic sensor provides a simple and practical way to introduce distance measurement into Arduino, robotics and DIY electronics projects. Its 2cm–450cm stated measurement range and straightforward TRIG/ECHO interface make it useful for prototyping systems that need to detect objects or measure their distance.

Whether you are building a robot, experimenting with Arduino or learning about electronic sensors, the HC-SR04 is a useful addition to an electronics prototyping setup.