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