The
HC-SR04 Ultrasonic Sensor is a reliable and affordable distance-measuring module designed for Arduino, Raspberry Pi, robotics, automation, and other electronics projects. It uses ultrasonic sound waves to detect objects and accurately measure the distance between the sensor and an object.
With a measuring range of approximately 2 cm to 400 cm, the HC-SR04 is ideal for applications such as obstacle detection, robot navigation, automatic doors, parking sensors, liquid-level monitoring, and smart control systems.
Key Features
- Measuring range: 2 cm–400 cm
- Operating voltage: 5 V DC
- Ultrasonic frequency: 40 kHz
- Simple 4-pin interface: VCC, TRIG, ECHO, GND
- Easy to integrate with Arduino and other microcontrollers
- Compact, lightweight, and cost-effective
- Suitable for robotics, automation, and educational projects
Applications
- Obstacle avoidance robots
- Distance measurement
- Parking assistance systems
- Automatic doors and barriers
- Smart home projects
- Object detection
- Water/liquid level monitoring
- DIY electronics and STEM projects
The HC-SR04 offers a simple and practical solution for projects requiring non-contact distance measurement.
