The HC-SR04 Ultrasonic Range Finder Sensor Module is a non-contact distance measurement sensor capable of measuring distances from 2 cm to 400 cm with high accuracy. It is widely used with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers for robotics, obstacle avoidance, automation, water level monitoring, and embedded system projects.
Key Features:
Non-contact ultrasonic distance measurement
Measuring range from 2 cm to 400 cm
High accuracy up to ±3 mm
40 kHz ultrasonic frequency
Simple 4-pin interface
Fast and reliable response
Easy to interface with microcontrollers
Compact PCB design
Low power consumption
Ideal for robotics and embedded applications
Technical Specifications:
Parameter | Details |
Model | HC-SR04 |
Product Type | Ultrasonic Distance Sensor Module |
Operating Voltage | 5V DC |
Operating Current | 15 mA |
Measuring Range | 2 cm – 400 cm |
Accuracy | ±3 mm |
Ultrasonic Frequency | 40 kHz |
Measuring Angle | Approximately 15° |
Trigger Input | 10 µs TTL Pulse |
Output | Echo Pulse (TTL) |
Interface | VCC, Trig, Echo, GND |
Applications:
Arduino Projects
ESP32 Projects
Raspberry Pi Projects
STM32 Development
Robotics
Obstacle Avoidance
Distance Measurement
Water Level Monitoring
Smart Parking Systems
Home Automation
Industrial Automation
STEM & Educational Projects