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Q&A

Posts tagged de-bouncing

Synonyms: debouncing

Anything related to debouncing techniques, both hardware and software.

Debouncing denotes a set of techniques to prevent problems caused by the phenomenon of electric contacts bounces.
Tag Wiki

When a set of electric contacts (e.g. in a switch, in a button, in a relay, etc.) changes state, i.e. closes or open, the voltage across the switch doesn't experience an abrupt variation, but rather may show a series of rapid oscillations and pulses of various amplitude until it reaches its final level.

If that signal is used to drive some sensitive digital input it can cause problems, since the voltage doesn't experience a nice, clean transition from one state to another.

For more details see this article:

A Guide to Debouncing, or, How to Debounce a Contact in Two Easy Pages, by Jack Ganssle

(also in PDF format)

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Q&A De-bouncing input signals?

I've heard that input signals to digital circuits should be "de-bounced", at least sometimes. What is de-bouncing? Why is it needed? When is it needed? What is bouncing around in the first place?

2 answers  ·  posted 3y ago by Olin Lathrop‭  ·  last activity 3y ago by Circuit fantasist‭

Question de-bouncing