HC-SR04 Ultrasonic Range Finder Module – Non-Contact Distance Measurement for Arduino & Robotics

📏 HC-SR04 Ultrasonic Range Finder Module – Non-Contact Distance Measurement for Arduino & Robotics

The HC-SR04 Ultrasonic Sensor Module is a reliable and cost-effective tool for measuring distances without physical contact. Using ultrasonic sound waves, it can accurately detect obstacles or measure object proximity from 2 cm up to 400 cm with a resolution of approximately 3 mm.

This sensor is widely used in robotics, home automation, object detection, and collision avoidance systems. Compatible with Arduino, ESP32, STM32, and Raspberry Pi, the HC-SR04 is supported by several open-source libraries and sample codes, making it beginner-friendly yet powerful for advanced applications.

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✅ Key Features:

• 🔊 Measurement Range: 2 cm to 400 cm (0.02 m to 4 m)

• 🎯 Accuracy: ±3 mm

• 🌐 Interface: Digital – Trigger and Echo pins

• 🔌 Operating Voltage: 5V DC

• ⚡ Current Consumption: ~15 mA

• ⏱️ Measuring Angle: ~15° cone

• 🔄 Working Principle: Sends 40kHz ultrasonic pulse and measures time for echo return

• 💡 Compact Design: Breadboard and jumper wire compatible

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🧰 Applications:

• Obstacle avoidance in robots

• Parking assistance systems

• Liquid level detection

• Distance-based alarms or indicators

• Smart trash bins and auto taps

• Industrial automation and safety systems

• Distance measurement tools in DIY projects

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🔗 Why Choose the HC-SR04?

The HC-SR04 module provides a simple, low-cost solution for accurate distance sensing using standard microcontroller platforms. With a digital I/O interface and no need for additional analog circuitry, it is ideal for both prototyping and production projects.

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📦 Package Includes:

• 1 x HC-SR04 Ultrasonic Distance Sensor Module

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🔍 Keywords:

HC-SR04 ultrasonic sensor, distance measuring module, Arduino rangefinder, ESP32 ultrasonic sensor, non-contact proximity sensor, ultrasonic detector Pakistan, obstacle avoidance sensor, robot distance sensor, HC-SR04 module for robotics.