Arduino for Beginners - 2022 Complete Course - Use the Ultrasonic Sensor with Interrupts Instead of pulseIn()

The video tutorial explains how to optimize the use of an ultrasonic sensor by replacing the blocking pulse function with interrupts. It covers the limitations of the pulse function, introduces the concept of interrupts, and provides a detailed guide on implementing interrupts in code. The tutorial also includes code optimization techniques and testing to ensure the program runs efficiently without blocking.

What is the purpose of using interrupts in the ultrasonic sensor program?

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Explain the process of measuring distance using the ultrasonic sensor.

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What happens when the signal stays low for a long time in the pulse measurement?

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Explain how the distance is computed from the pulse duration.

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What modifications are made to the code to ensure it does not block during pulse measurement?

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Describe the steps involved in setting up an interrupt for the echo pin.

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How do you determine whether the signal is rising or falling when using the change mode?

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What are the two variables created to store the pulse timing, and why are they marked as volatile?

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What is the recommended minimum frequency for triggering the ultrasonic sensor, and why?

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Discuss the impact of using a very low trigger frequency on the ultrasonic sensor's performance.

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