Briefly introduced: The ultrasonic distance sensor HC-SR04

The HC-SR04 is a very inexpensive ultrasonic range sensor. He is primarily in robotics and autonomous vehicles in use, being possible to use the sensor for example for obstacle detection, but also level indicators or motion detection are possible with this sensor.

HC-SR04 ultrasonic distance sensor

HC-SR04 ultrasonic distance sensor


  • Supply voltage 5V
  • Measuring distance 20mm-4000mm
  • up to 50 measurements per second
  • Arduino compatible

Projects with the HC-SR04 Ultrasonic range sensor:

The HC-SR04 ultrasonic distance sensor and an Arduino


eBay: HC-SR04
Amazon: HC-SR04