HC-SR04 Ultrasonic Distance Sensor – Accurate Range Detection for Arduino & Raspberry Pi
The HC-SR04 Ultrasonic Distance Sensor is a reliable and affordable module designed for accurate distance measurement using ultrasonic waves. Ideal for Arduino, Raspberry Pi, ESP32, and other microcontroller platforms, this sensor is widely used in robotics, obstacle avoidance systems, home automation, and object detection projects.
Using ultrasonic sound waves, the HC-SR04 measures distances from 2 cm to 400 cm (0.8″ to 157″) with an accuracy of up to 3 mm. Its compact design, low power consumption, and easy interfacing make it the go-to choice for students, hobbyists, and developers.
Whether you’re building an autonomous robot, a smart parking system, or an IoT device that needs range sensing, the HC-SR04 is a must-have component in your toolkit.
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