Ultrasonic Sensor HC-SR04


The ultrasonic sensor HC-SR04 is a popular sensor module used for distance measurement in various projects and applications. It is commonly used with microcontrollers such as Arduino for obstacle detection, object avoidance, and distance sensing.

The sensor HC-SR04 typically has four pins: VCC (power supply), GND (ground), Trig (trigger), and Echo (echo signal output). It requires both 5V power supply and a separate GPIO pin to trigger the sensor and read the echo signal.