HC-SR04 Ultrasonic Distance Sensor Module

The HC-SR04 Ultrasonic Distance Sensor Module is a high-precision, cost-effective solution for measuring distances using ultrasonic waves. Widely used in robotics, obstacle avoidance systems, automated distance measurement, and IoT applications, this sensor is ideal for makers, hobbyists, and developers working with Arduino, ESP32, Raspberry Pi, and similar platforms.

By emitting ultrasonic pulses and measuring the time it takes for the echo to return, the HC-SR04 can accurately calculate distances from 2cm to 400cm. It’s easy to interface using digital I/O pins, making it a staple in many DIY and embedded projects.

Key Features:

• Measuring Range: 2cm to 400cm with ~3mm accuracy
• Operating Voltage: 5V DC
• Working Frequency: 40kHz
• Interface: 4 Pins (VCC, Trig, Echo, GND)
• Compatible with Arduino, ESP8266, ESP32, Raspberry Pi, etc.
• Compact design, lightweight, and easy to integrate

Applications:

• Obstacle detection in robots
• Smart parking systems
• Liquid level detection
• IoT distance measurement solutions
• Security and automation systems