HC-SR04 Ultrasonic Sensor 4-Pin | 3V Distance Measuring Module for Arduino & Robotics

The HC-SR04 4-Pin Ultrasonic Sensor (3V version) is a compact and reliable module for non-contact distance measurement. It uses ultrasonic sound waves to detect objects and measure distances from 2cm to 400cm with high accuracy, making it ideal for Arduino, Raspberry Pi, and robotics applications.

Unlike standard 5V versions, this 3V-compatible sensor works seamlessly with low-voltage microcontrollers, providing more flexibility and power efficiency—perfect for battery-powered projects and IoT devices.

Key Features:

• Model: HC-SR04 (4-pin, 3V version)

• Operating Voltage: 3V – compatible with ESP32, Raspberry Pi, STM32, etc.

• Interface: 4 pins (VCC, Trig, Echo, GND)

• Measurement Range: 2cm to 400cm

• Accuracy: ±3mm

• Applications: Distance sensing, obstacle avoidance, robotics, automation

• Easy to use: Plug-and-play with most microcontroller boards

• Compact Design: Ideal for tight spaces and embedded projects

Whether you're building a robot car, designing a smart parking system, or experimenting with IoT projects, the HC-SR04 3V ultrasonic sensor is a reliable and affordable solution for precise distance detection.