Debouncing Switches: It's More Complex Than You Think
2025-01-08
This article delves into the complexities of mechanical switch bouncing. The author conducted experiments on 18 different switch types, revealing bounce times ranging from nanoseconds to hundreds of milliseconds, significantly impacted by switch type and actuation method. The findings highlight the inadequacy of simple software debouncing techniques for all scenarios, emphasizing the need for context-specific hardware or software solutions. Analysis reveals that besides physical contact bounce, analog signal transitions within TTL logic levels contribute to logical bouncing. The results challenge assumptions about switch behavior and call for more robust debouncing strategies.
Hardware
switch debouncing