![]() ![]() Inches = (duration/2) / 74 // Divide by 74 or multiply by 0.0135įirst, you create variables for the trigger and echo pin called trigPin and echoPin, respectively. ![]() of the ping to the reception of its echo off of an object.Ĭm = (duration/2) / 29.1 // Divide by 29.1 or multiply by 0.0343 duration is the time (in microseconds) from the sending Read the signal from the sensor: a HIGH pulse whose Give a short LOW pulse beforehand to ensure a clean HIGH pulse: The sensor is triggered by a HIGH pulse of 10 or more microseconds. * Complete Guide for Ultrasonic Sensor HC-SR04 Upload the following code to your Arduino IDE. The following table shows the connections you need to make: Ultrasonic Sensor HC-SR04 ![]()
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