When I press a button on my Arduino, the signal sometimes flickers or seems to be detected multiple times. What could be causing this, and how can I fix it? Does the debounce technique actually work? Any experiences or advice on this?
How to prevent button delay in Arduino?
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Man, your problem is exactly what happened to me too, and honestly, mine was even worse, thank God. My project was an Arduino-controlled LED desk lamp, and when I used it in night mode, the LED would flicker like crazy after pressing the button—it’d flash four or five times, and sometimes it’d just stay on indefinitely. I was so frustrated I spent the whole night debugging, and eventually, I figured out it was because the button’s contact time was making Arduino keep receiving signals.
Then I tried some quick fixes with "debounce" techniques, starting with just adding a 50ms delay to the sensor input instead of filtering it directly. But soon I realized that delay was causing issues in other parts of my projects where timing mattered. In the end, the most reliable solution was software debounce—I wrote a "band-pass" code that waited for the button to stabilize. After a few tries, I finally nailed the button press perfectly, and now I don’t get any delays or multiple signals. Bottom line: debounce really works, but you gotta implement it the right way.