Peter,

On Tue, 3 Jan 2006 01:04:14 +0200 (IST), Peter wrote:

> 
> On Mon, 2 Jan 2006, Howard Winter wrote:
> > On Sun, 1 Jan 2006 20:20:58 +0200 (IST), Peter wrote:

> >>...

> >> Down state bouncing seldomly occurs with new keys. It happens with
> >> 'rubber' keys and oxydized contacts or weak springs.
> >
> > Right, but if you rely on that you are building obsolescence into your 
> > software, since mechanical switches do change as they age, but are 
> > still usable even with a noisy signal if you debounce properly.
> 
> I do not follow you here. Rely on what ? Some new rubber keys cannot 
> make their mind up whether they are up or down after 10 pushes. 
> Metal/metal pushbuttons can start to show signs of old age after six 
> months. I was advocating debouncing for both up and down, in software. 
> Maybe I made myself misundestood ;-)

Ah yes, I see what you mean now!  I thought you were saying that debouncing wasn't needed with "new keys" 
because they don't bounce.

Sorry - it seems we are in violent agreement!  :-)

Cheers,


Howard Winter
St.Albans, England


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