Triggering an ultrasonic sensor
I made a smart blind stick for my class project. It uses an ultrasonic sensor to detect obstacles and I was asked this question in VIVA...
Why is it necessary for giving a digital high for 10 μS on the trigger (Trig) pin of an ultrasonic sensor ?
Why 10 μS only?
I changed it to 5 μS then to 20 μS and to 50 μS and it still works fine! Why so?
manish
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lang-cpp