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Video 22: Measuring Distance with the HC-SR04 Ultrasonic Sensor
=======================================================================================


Learn how to measure distance using the HC-SR04 ultrasonic sensor with a Raspberry Pi, 
including wiring, coding, and unit conversion. Explore troubleshooting tips, 
understand distance measurement principles, discover practical applications, 
and receive a homework assignment to measure the speed of sound experimentally.


1. **Introduction**: Overview of the tutorial and sponsorship acknowledgment.
2. **Previous Assignment**: Recap of the HC-SR04 sensor assignment from the previous lesson.
3. **Setup and Wiring**: Explanation of the wiring setup, including connection to the Raspberry Pi.
4. **Code Explanation**: Understanding the code for measuring ping travel time and distance.
5. **Troubleshooting**: Tips for identifying and fixing coding errors.
6. **Understanding distance measurement**: Explanation of ultrasonic sensor principles.
7. **Correction factor**: Recognizing the correction needed for accurate distance measurement.
8. **Unit Conversion**: Discussion on converting units for accurate measurement.
9. **Practical applications**: Exploring real-world uses of ultrasonic sensors.
10. **Fusion 360 integration**: Encouragement to combine Raspberry Pi skills with 3D printing knowledge.
11. **Homework assignment**: Challenge to experimentally measure the speed of sound using the sensor.


**Video**

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