7.2. Ranging Sensor Overview

Try these first

1. 1.

   What is the function of the Trigger pin in the HC-SR04?

   Hint

   Think about which pin triggers the measurement process.

2. 2.

   What does the Echo pin do?

   Hint

   It's responsible for listening to the sound wave return.

3. 3.

   What does the Trigger pin do on the HC-SR04?

   • Sends a pulse to measure
   • Receives an echo
   • Calculates distance

   Hint

   Consider which pin starts the measurement process.

4. 4.

   True or False: The Speed of Sound is constant in all conditions.

   • True
   • False

   Hint

   Think about what affects sound traveling through air.

5. 5.

   You have an echo time of 25 ms. Calculate the distance the object is from the sensor and discuss how different conditions could affect this measurement.

   Hint

   Make sure to convert milliseconds to seconds.

6. 6.

   In a practical scenario, how would you integrate the HC-SR04 sensor into a robotic application for obstacle avoidance? Outline the implementation steps.

   Hint

   Think about how feedback loops work in robotics.