Arduino for Beginners - 2022 Complete Course - Step 4 - Unlock the App with the Debounced Push Button

The video tutorial explains how to implement a locking and unlocking mechanism for an application using an ultrasonic sensor and a push button. It covers the setup of the sensor to lock the application when an object is within a certain distance and the use of a push button to unlock it. The tutorial details the debounce technique for reliable button press detection and provides a step-by-step guide to coding the logic for locking and unlocking. Testing and debugging methods are also discussed, along with a recap of the project and suggestions for future improvements.

Discuss the importance of checking the button state only when the application is locked.

What role does the yellow LED play in the application?

What happens to the red LED when the application is unlocked?

How can the functionality of the project be improved beyond locking and unlocking the application?