HC-SR04 Ultrasonic Distance Sensor Module – 2 to 400cm Range

Description

Description

The HC-SR04 is an ultrasonic distance sensor module designed for non-contact distance measurement with high precision. It operates at 40kHz, emitting ultrasonic waves and measuring the echo time to calculate distances ranging from 2cm to 400cm with an accuracy of 3mm. The module outputs a TTL pulse signal and requires a 5V DC power supply, with a sensor beam angle of less than 15 and static current below 2mA. It is compatible with microcontrollers including Arduino, Raspberry Pi, STM32, and ESP32, making it suitable for robotics, obstacle detection, and object ranging applications.

Features

• Measurement Range: 2400cm for versatile distance sensing

• Frequency: 40kHz ultrasonic signal for precise echo detection

• Accuracy: 3mm typical measurement precision

• Output Signal: TTL pulse width signal corresponding to distance

• Trigger Input: 10s TTL pulse for measurement initiation

• Operating Voltage: 5V DC with low power consumption

• Sensor Beam Angle: Less than 15 for focused detection

• Static Current: Less than 2mA for energy-efficient operation

Specifications

• Brand / Model | HC-SR04

• Product Type | Ultrasonic Distance Sensor Module

• Measurement Range | 2400cm

• Accuracy | 3mm

• Operating Frequency | 40kHz

• Trigger Input | 10s TTL pulse

• Output Signal | TTL pulse width corresponding to distance

• Operating Voltage | 5V DC

• Static Current | <2mA

• Sensor Beam Angle | <15

• Dimensions | Approx. 45 20mm

• Applications | Robotics, obstacle detection, object ranging, automation

Links

• HC-SR04 Datasheet
• 3D model Step File (Grabcad)

Tutorials

• Make an Automatic Gate opener using Arduino (Article)
• Make an Automatic Gate opener using Arduino (Video)
• Arduino Distance Detector With a Buzzer and LEDs