🔍 Product Overview

The HC-SR04 is a widely used ultrasonic distance sensor module that offers non-contact measurement from about 2 cm up to 4 m. With a built-in ultrasonic transmitter and receiver plus control circuitry, it’s an ideal choice for robotics, automation, and distance-sensing projects.

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🚀 Why It’s Ideal for Your Projects

• Wide range, accurate results – Capable of detecting objects from just a couple of centimetres up to several metres away, with an accuracy of around 3 mm in ideal conditions.

• Simple interface – With just four pins (VCC, GND, TRIG, ECHO), integrating this sensor into an Arduino or other microcontroller setup is quick and straightforward.

• Versatile use-cases – From obstacle-avoiding robots and parking sensors to liquid level detection and presence sensors, its uses span many DIY and professional domains.

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📝 Key Features

• Operating voltage: DC 5V

• Typical current draw: around 15 mA during measurement

• Ultrasonic frequency: 40 kHz

• Range: approximately 2 cm to 400 cm (or up to 4 m)

• Measuring angle: roughly 15° under ideal conditions

• Trigger pulse: a 10 µs high signal initiates measurement

• Very simple wiring: one pin to trigger, one pin to read echo, plus power and ground

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🎯 Typical Applications

• Obstacle avoidance / robots – Use on mobile robots or drones to detect nearby obstacles and avoid collisions.

• Level detection – Measure the height of liquids or granular materials in tanks or containers without making contact.

• Smart parking / distance alerts – Build a DIY parking sensor or proximity alert system using this module with LEDs or buzzers.

• Interactive installations – Use distance readings to trigger lights, sounds or events in interactive art, installations or kiosks.

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✅ Why You’ll Love It

If you’re creating a project where knowing “how far away is that object?” matters, this sensor gives you an affordable, accurate and easy-to-integrate solution. With minimal setup and broad compatibility, it’s a go-to tool for makers, hobbyists and engineers alike who need reliable non-contact distance measurement.