Ultrasonic Distance Sensor HC-SR04

Overview

This is the HC-SR04 ultrasonic distance sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

This sensor has additional control circuitry that can prevent inconsistent "bouncy" data depending on the application.

Spec

• Operating Voltage: 5V DC
• Operating Current: 15mA
• Measure Angle: 15°
• Ranging Distance: 2cm - 400cm
• Accuracy: 3mm
• Measuring angle covered: <15°
• Operating Frequency: 40Hz

Pinout

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!

Reference

• Datasheet
• Example Tutorial
• GitHub

Video