HC-SR04 Sensor

The HC-SR04 Ultrasonic Sensor is a popular and easy-to-use module for non-contact distance measurement. It works by sending an ultrasonic wave at 40kHz which travels through the air, reflects off an object, and returns to the sensor. By measuring the time taken for the echo to return, it calculates the distance with high precision. This sensor is widely used in Arduino projects, robotics for obstacle detection, and industrial applications like liquid level monitoring. It operates at 5V logic, making it compatible with most microcontrollers including Arduino, ESP32, and Raspberry Pi. The module includes an ultrasonic transmitter, receiver, and control circuitry on a small PCB. Its compact size and simple 4-pin interface (VCC, Trig, Echo, GND) make it extremely easy to integrate into your projects. Choose the HC-SR04 for a reliable, affordable, and accurate distance sensing solution.