Debouncing

1. Definition

Debouncing is A technique used to remove unwanted input noise from buttons, switches or other user input. Debouncing prevents extra activations or slow functions from triggering too often. Without debouncing, a single button press can register as multiple presses.

Debouncing example

2. Why Debouncing is Needed

When a button or switch is pressed, the contacts inside physically bounce for a few milliseconds.
This causes the circuit to detect multiple signals instead of a single, clean one.
Debouncing ensures stable and reliable input.

3. Types of Debouncing

3.1 Hardware Debouncing

  • Uses resistors, capacitors, or dedicated ICs.
  • Filters out the bouncing signals before they reach the microcontroller.
  • More reliable for critical applications.

3.2 Software Debouncing

  • Done in code by adding a delay or logic that ignores repeated signals within a short time (e.g., 10–50 ms).
  • Easy to implement in Arduino or microcontrollers.

4. Video Explanation

Video coming soon