How to implement hardware debounce for switches and relays when software debounce isn't appropriate

摘要

If unmitigated, switch bounce can cause microprocessors and other electronic circuits to see a single switch activation as comprising multiple events.The bouncing signal from a switch is often debounced using software, running in a microcontroller. Although this is a low-cost solution, it may not always be the best option, including systems based on performance and memory-limited microcontrollers, software developers lacking expertise in switch-related issues, or systems implemented without a microcontroller.