HC-SR04 Ultrasonic Distance Sensor Module

HC-SR04 Ultrasonic Distance Sensor Module
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  • Product Code:SQ1047
  • Availability: 1000
  • $0.49
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Tags: HC-SR04, ultrasonic sensor, distance sensor, Arduino, 40kHz, rangefinder

The HC-SR04 sensor is a widely used non-contact ranging device that measures distances from 2cm to 400cm with an accuracy of approximately 3mm. The module integrates an ultrasonic transmitter, a receiver, and a control circuit on a single compact board, requiring only four connections: VCC, Trig, Echo, and GND. Operating from a 5V DC supply with a low working current of about 15mA, this sensor is compatible with Arduino, Raspberry Pi (with voltage level adjustment), and a wide range of microcontrollers. Ranging is initiated by a 10µs TTL trigger pulse, after which the module emits an eight-cycle burst of 40kHz ultrasound and outputs an echo pulse whose width is proportional to the measured distance.
The effective measuring angle is approximately 15 degrees, and because the sensor relies on sound waves rather than light, its performance remains stable in dark or brightly lit environments. Typical applications include obstacle avoidance in robotic platforms, security systems, UAV altitude sensing, industrial automation, and any project requiring precise non-contact distance measurement. The rangefinder is also supported by popular Arduino libraries such as NewPing, simplifying software integration for rapid prototyping.

HC-SR04 Ultrasonic sensor Application

  1. Obstacle detection and collision avoidance in mobile robots and UAVs.
  2. Distance measurement for smart home security systems.
  3. Non-contact level sensing in industrial automation equipment.
  4. Educational projects with Arduino and Raspberry Pi using the HC-SR04.
  5. Parking assistance and proximity detection in automotive prototypes.

Arduino ultrasonic module Specifications

  1. Model: HC-SR04.
  2. Operating voltage: DC 5V.
  3. Working current: 15mA (typical), quiescent current below 2mA.
  4. Ultrasonic frequency: 40kHz.
  5. Measuring range: 2cm to 400cm.
  6. Ranging accuracy: up to 3mm.
  7. Effective measuring angle: approximately 15 degrees.
  8. Trigger input signal: 10µs TTL pulse.
  9. Echo output signal: TTL level, pulse width proportional to distance.
  10. Connector: XH2.54-4P (VCC, Trig, Echo, GND).
  11. Dimensions: 45mm × 20mm × 15mm (board).
  12. Weight: approximately 9g.
  13. Operating temperature: -15°C to +70°C.
Interfaces
Interface Type TTL
Sensor Parameters
Distance Range 2cm ~ 400cm
Induction Angle <15°
Resolution 0.3cm
Electrical Parameters
Frequency 40KHz
Input Voltage 5V
Working Current 15mA
Board Parameters
Pin Count 4 Pin
Physical Parameters
Size 45mm x 20mm x 15mm

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