Arduino for Beginners - 2022 Complete Course - Software Debounce Inside an Interrupt

The video tutorial explains the comparison between interrupt and debounce code, focusing on setting up variables for button release and implementing debounce logic using time checks. It highlights the importance of using the volatile keyword for variable modification within interrupts. The tutorial also discusses compiling the code and checking its functionality. Finally, it addresses the limitations of software debounce and suggests hardware solutions for better performance.

What is the primary purpose of introducing interrupts in the code?

• To simplify the code structure

• To handle button presses more efficiently

• To increase the speed of the program

• To reduce memory usage

Why is it important to check the duration since the last button release in the debounce logic?

• To ensure the button is pressed

• To verify the button is not stuck

• To confirm the debounce delay is exceeded

• To check the button's physical condition

What is the role of the 'volatile' keyword in the context of interrupts?

• To increase variable size

• To prevent syntax errors

• To ensure variables are not cached

• To optimize the code for speed

Why should 'Millis' be used cautiously within interrupts?

• It may return incorrect time values

• It is disabled inside interrupts

• It can cause the program to crash

• It consumes too much memory

What is a suggested solution for more reliable debounce handling?

• Using multiple interrupts

• Using a software library

• Implementing a hardware debounce setup

• Increasing the debounce delay

What should be checked if a push button exhibits erratic behavior?

• The button's size

• The button's connection and quality

• The button's color

• The button's manufacturer

What is the main drawback of using software debounce?

• It is incompatible with interrupts

• It requires expensive components

• It may not work 100% of the time

• It is too complex to implement