Martin R. Green wrote:

> I am planning to debounce a simple
> pushbutton connected to a PIC input with
>
> weak pullups enabled.  My strategy is to
> read the button every 10ms, and
> when 4 successive reads are the same,
> consider the level valid.  This will
> of course mean that the button level
> must be the same for at least 30ms to
> be considered valid.  The algorithm I am
> using will easily allow checking
> for up to 8 matching reads, any more
> than that and I'll have to change the
> method.
>
> Any comments on this?  Is 10ms about
> right?  How about using 4 successive
> reads, is this enough, too many, etc.?
>
> TIA - Martin R. Green
> elimar@bigfoot.com

I've always used approx. 50ms delay
between testing buttons. You then don't
have to test the button repeatedly, but
you might loose a little "feeling".
Tweaking this value  improves this but
then you might need quick fingers!

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Eric van Es               | Cape Town,
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