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