Why is it a good idea to add delay in a ultrasonic sensor?
Adding a delay in an ultrasonic sensor application is essential for several important reasons. Here's a detailed explanation: 1. Prevents Signal Interference (Most Important Reason) Ultrasonic sensors work by sending a sound pulse and listening for the echo. Without a delay, you might send a new pulse before the previous echo has returned, causing interference. Bad Code (No Delay): cpp void loop ( ) { digitalWrite ( trigPin , HIGH ) ; delayMicroseconds ( 10 ) ; digitalWrite ( trigPin , LOW ) ; long duration = pulseIn ( echoPin , HIGH ) ; // Problem: New trigger might interfere with echo reception // Immediately triggers again... } Good Code (With Delay): cpp void loop ( ) { digitalWrite ( trigPin , HIGH ) ; delayMicroseconds ( 10 ) ; digitalWrite ( trigPin , LOW ) ; long duration = pulseIn ( echoPin , HIGH , 30000 ) ; // Timeout after 30ms delay ( 50 ) ; // Crucial: Wait before next measurement } 2....