HC-SR04 Ultrasonic Distance Sensor Module

HC-SR04 Ultrasonic Distance Sensor Module

Add “vision” to your robotics and automation projects with the highly popular HC-SR04 Ultrasonic Distance Sensor. This sensor is the go-to choice for reliable and accurate non-contact distance measurement. It’s an essential component for any project that needs to detect objects, measure distances, or navigate its environment.

The HC-SR04 works on the principle of sonar. It sends out a high-frequency sound pulse from its transmitter and waits for the pulse to bounce off an object and return to its receiver. By measuring the travel time of the sound wave, it can calculate the distance to the object with impressive accuracy, ranging from 2cm up to 400cm (4 meters).

Interfacing with the HC-SR04 is straightforward. You provide a short pulse to the “Trig” pin to initiate a measurement and then read the duration of the pulse on the “Echo” pin. This simple process is supported by libraries for all major microcontrollers, including Arduino, Raspberry Pi, and ESP32, making it incredibly easy to integrate into your projects.

Key Features:

• Model: HC-SR04
• Sensing Principle: Ultrasonic Sonar
• Detection Range: 2cm to 400cm (4m)
• High Accuracy: Ranging accuracy can reach up to 3mm
• Interface: Simple Trig (input) and Echo (output) signal pins
• Operating Voltage: 5V DC
• Compact and Reliable: A staple component for hobbyists and professionals alike

Applications:

The HC-SR04 is perfect for a huge range of applications, including obstacle avoidance for robots and drones, distance measuring devices, parking sensor systems, water level monitors in tanks, and interactive art installations.