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Video 4: Obstacle Avoidance with Ultrasonic
============================================

This video tutorial covers obstacle avoidance using an ultrasonic sensor in the PiCar-X robot:

* **Introduction to Ultrasonic Sensor**: Explains how to use the ultrasonic sensor for measuring distance and controlling the car's movement.
* **Python Code Walkthrough**: Details the Python code for obstacle avoidance, including variable definitions and conditional movement logic.
* **Creating and Running Custom Scripts**: Shows how to write and execute custom scripts for U-turns and obstacle reactions.
* **Practical Demonstrations**: Provides demonstrations of the robot's obstacle avoidance capabilities on different surfaces.
* **Code Saving and Updating**: Explains how to save and update scripts on the robot.

This lesson offers an essential guide to implementing ultrasonic sensor-based obstacle avoidance in the PiCar-X robot.


**Video**

.. raw:: html

    <iframe width="700" height="500" src="https://www.youtube.com/embed/zi5GM7lP5JA?si=obLF_79PFZv8xAZl" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

**Related On-line Tutorials**

* :ref:`py_avoid`