HC-SR04-Ultrasonic Range Finder

HC-SR04 Ultrasonic Distance Sensor – Accurate Range Detection for Arduino & Raspberry Pi

The HC-SR04 Ultrasonic Range Finder is a compact and reliable sensor that measures distance using ultrasonic sound waves. Designed for Arduino, Raspberry Pi, and other microcontrollers, it provides accurate distance measurement without contact. Whether you are building a robot, smart vehicle, or automation system, this sensor is the ideal choice for detecting objects and measuring distance precisely.

How the HC-SR04 Works

The HC-SR04 sensor sends out an ultrasonic pulse and waits for it to bounce back from an object. Then, it calculates the distance based on the time taken for the echo to return. As a result, it can measure distances ranging from 2 cm to 400 cm, with an accuracy of up to 3 mm.

Because it works on simple trigger and echo pins, it is extremely easy to use. You only need a few lines of code to connect it to an Arduino or Raspberry Pi and start measuring distance instantly.

Easy Integration with Arduino and Raspberry Pi

The HC-SR04 Ultrasonic Range Finder is compatible with a wide range of microcontroller platforms. It features four simple pins (VCC, Trig, Echo, GND), making wiring straightforward. Moreover, it works with standard 5V logic levels, eliminating the need for additional components in most projects.

You can integrate it into robotics projects, IoT devices, or automation systems quickly. In addition, several open-source libraries are available online to help beginners get started easily.

Applications

Because of its accuracy and ease of use, the HC-SR04 is ideal for a wide variety of applications, including:

• Obstacle avoidance in robots

• Smart parking systems

• Object detection in IoT devices

• Distance measurement tools

• Level detection in tanks or containers

Furthermore, its low power consumption makes it suitable for battery-powered and mobile systems.

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