The HC-SR04 Ultrasonic Sensor is a non-contact distance measurement module designed to detect nearby objects and measure the distance between the sensor and a target. It uses 40kHz ultrasonic sound...
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The HC-SR04 Ultrasonic Sensor is a non-contact distance measurement module designed to detect nearby objects and measure the distance between the sensor and a target. It uses 40kHz ultrasonic sound waves to calculate distance from the returning echo, making it suitable for robotics, automation, and electronic sensing applications.
Operating at 5V DC, the module uses TRIG and ECHO pins for communication with compatible microcontrollers. With a typical measuring range of 2cm to 400cm and accuracy of up to 3mm under suitable conditions, it is widely used in Arduino projects, obstacle detection systems, and DIY electronics.
Model: HC-SR04
Operating voltage: 5V DC
Operating current: Approximately 15mA
Ultrasonic frequency: 40kHz
Measuring range: 2cm–400cm
Ranging accuracy: Up to 3mm under suitable conditions
Detection angle: Approximately 15°
Interface: TRIG and ECHO digital signals
Four connection pins: VCC, TRIG, ECHO, GND
Non-contact distance measurement
Arduino distance measurement
Robot obstacle avoidance
Object and proximity detection
Automatic parking assistance
Water-level monitoring projects
Robotics and automation
Smart home electronics
DIY electronics and educational projects
