-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Hasan Khan
Sent: Friday, December 26, 2008 1:32 PM
To: PIC List
Subject: [PIC] How to do switch debounce quick enough

>Hi,
>Well, I am finally moving from hobby to pro zone. I got a simple project
>where I have to design a triac based ac power controller with two push
>buttons, one to increase power to triac and one to decrease power.  Power
>level is displayed on a single 7-seg display.

Do you need to debounce at all? If you are changing the time delay from zero
crossing to triac on by adding of subtracting to a variable will it matter?
If the step is small and the loop "tight" perhaps bounce wont show up to the
user. If the step is 10% at a time based on the display then I see the need
to debounce. How about a smaller step and the display flashes to show a
button is down to provide feedback. Or is the display even needed, can the
user determine output from the device being controlled?

FWIW this free advice is likely worth the cost at best. 

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