HC-SR04 Ultrasonic Distance Sensor Module

HC-SR04 Ultrasonic Sensor Module measures distance from 2cm to 400cm with high accuracy using ultrasonic sound waves. Perfect for obstacle detection, distance measurement, and Arduino-based robotic projects.

Technical Specifications:

1. Operating Voltage: 5V DC
2. Operating Current: 15mA (typical)
3. Measuring Range: 2cm – 400cm
4. Accuracy: ±3mm
5. Measuring Angle: ≤ 15°
6. Input Trigger Signal: 10µs TTL pulse
7. Output Echo Signal: TTL level pulse proportional to distance
8. Operating Frequency: 40kHz
9. PCB Size: Approx. 45mm × 20mm × 15mm

The HC-SR04 Ultrasonic Distance Sensor Module is a highly accurate and reliable device designed to measure distance by using ultrasonic sound waves. It works by sending an ultrasonic pulse and measuring the time it takes for the echo to return, allowing the calculation of the distance to an object.

This sensor is widely used in robotics, automation, and IoT applications such as distance measurement, obstacle avoidance, and level detection systems.

It is simple to interface with Arduino, ESP32, NodeMCU, and Raspberry Pi, requiring only four pins: VCC, Trig, Echo, and GND. With a range of 2cm to 400cm and a measuring angle of about 15°, it provides stable and precise readings suitable for both indoor and outdoor use.

🧠 Features:

1. Non-contact distance measurement using ultrasonic waves
2. High precision and long detection range (up to 4 meters)
3. Simple 4-pin interface for easy connection
4. Compatible with Arduino, ESP32, NodeMCU, and Raspberry Pi
5. Low power consumption and stable performance
6. Compact design for robotics and automation projects

📦 Applications:

1. Obstacle avoidance in robotic systems
2. Distance measurement tools
3. Water level and tank monitoring systems
4. IoT-based smart automation projects
5. Security and proximity sensing systems