Ultrasonic Range Finder Distance Measuring Sensor Module

The HC-SR04 is an inexpensive ultrasonic distance sensor that works with Arduino.

Check out the HC-SR04 Holder


  • Power supply : 5V DC
  • Quiescent current : 15 mA
  • Effectual angle: 15°
  • Ranging distance : 2cm – 4 m
  • Resolution : 3 mm
  • Works with Arduino, 8051, AVR, Raspbarry Pi.

There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up and use for your next range-finding project!