HC-SR04 Ultrasonic sensor for Arduino/Raspberry Pi

The HC-SR04 Ultrasonic Sensor Module is a highly accurate distance measuring device ideal for a wide range of proximity detection applications. Using ultrasonic sound waves, it can measure distances from 2 cm to 400 cm with an impressive precision of 3 mm. It’s perfect for Arduino, Raspberry Pi, ESP32, and other microcontroller platforms, making it a must-have for developers and hobbyists alike.

With its easy-to-use trigger and echo interface, the HC-SR04 enables quick integration into projects like robotics, obstacle-avoidance systems, water level monitoring, smart parking, and automated control systems. It’s compact, low-power, and reliable—ideal for both DIY and industrial projects.

✅ Key Features:

• Measures distance from 2 cm to 400 cm
• High accuracy with ±3 mm resolution
• Operates on 5V DC power supply
• Simple 4-pin interface (VCC, Trig, Echo, GND)
• Compatible with Arduino, Raspberry Pi, ESP32

🛠️ Applications:

• Obstacle-avoidance robots and drones
• Smart parking and garage sensors
• Liquid/water level detection systems
• Industrial automation and safety systems
• Distance-based triggering or control systems