The HC-SR04 Ultrasonic Range Finder is a highly accurate and easy-to-use sensor designed for measuring distances in a variety of applications. Utilizing ultrasonic sound waves, it can measure distances ranging from 2 cm to 400 cm, making it ideal for robotics, obstacle detection, and proximity sensing.
Key Features
- Wide Range of Measurement: Capable of measuring distances from 2 cm to 400 cm, with a precision of ±3 mm.
- High Accuracy: Provides reliable and accurate distance measurements, essential for precise applications.
- Easy Interfacing: Simple to connect and integrate with microcontrollers and other control systems using standard I/O pins.
- Compact Design: Small form factor allows for easy incorporation into a wide range of projects and devices.
- Low Power Consumption: Efficient operation suitable for battery-powered applications.
Specifications
- Operating Voltage: 5V DC
- Operating Current: 15mA
- Ultrasonic Frequency: 40 kHz
- Measurement Range: 2 cm to 400 cm
- Accuracy: ±3 mm
- Trigger Input Signal: 10 µs TTL pulse
- Echo Output Signal: TTL pulse proportional to distance
- Dimensions: 45 mm x 20 mm x 15 mm
Pin Configuration
- VCC: 5V DC power supply
- Trig: Trigger input (10 µs TTL pulse)
- Echo: Echo output (pulse width proportional to distance)
- GND: Ground
Applications
The HC-SR04 Ultrasonic Range Finder is versatile and can be used in various applications, including:
- Robotics: For obstacle avoidance and navigation.
- Security Systems: In proximity sensors and intruder detection systems.
- Automotive: Parking assistance and vehicle detection systems.
- Industrial Automation: Distance measurement in automated processes.
- Home Automation: Smart devices that require distance sensing.
How It Works
The HC-SR04 operates by emitting an ultrasonic pulse through its transmitter. The pulse travels through the air and reflects off any object in its path. The sensor’s receiver then detects the reflected pulse. By calculating the time interval between sending and receiving the pulse, the sensor determines the distance to the object.
Getting Started
- Connect the VCC and GND pins to a 5V power supply and ground, respectively.
- Connect the Trig pin to a digital output pin on your microcontroller.
- Connect the Echo pin to a digital input pin on your microcontroller.
- Trigger the sensor by sending a 10 µs pulse to the Trig pin.
- Read the duration of the pulse on the Echo pin, which corresponds to the distance.
Numerous online tutorials and example codes are available to help you integrate the HC-SR04 into your projects quickly and efficiently.
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