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The HC-SR04 Ultrasonic Sensor is a widely used sonar-based distance measurement module for detecting obstacles and measuring distances accurately using ultrasonic waves. It sends an ultrasonic pulse and calculates the time taken for the echo to return, making it ideal for Arduino, ESP32, Raspberry Pi, and other microcontroller-based projects.

Perfect for applications like obstacle-avoiding robots, automated distance measurement, water level detection, and smart parking systems, the HC-SR04 is a must-have in any DIY electronics toolkit.

Key Features:

Model: HC-SR04

Operating Voltage: 5V DC

Measuring Range: 2cm to 400cm (accurate up to ~3mm)

Interface: 4 Pins – VCC, Trig, Echo, GND

Measuring Angle: ~15 degrees

Low power consumption and high accuracy

Easy to use with Arduino, ESP32, Raspberry Pi, and more

Applications: Robotics, automation, smart parking, water level sensors, obstacle detection