Debounce PULSIN?

[mister_e]

in the TTL stone age, we was using an RC circuit. output of the switch to a pull down resistor an to a capacitor, the other side of the capacitor to the PIC input and to a pull down resistor.

Some will also prefer to use a Schmitt trigger or a voltage comparator with a close to VDD treshold.

[Acetronics2]

Hi, Picmen

Being a little mocking, I would point out this kind of measure is based on DIGITAL inputs and not Analogic swinging voltages ...

The answer is here: you want to measure something, but don't really know what !!!

If you use a calibrated PAUSE, from the first detection, say 20ms ( i.e.) not to deal with bouncing and use a RCTime command just after, you just will have to add the PAUSE time to your result ...
The Button command could also be taken for that ... as debouncing time is known. of course always followed by a RCTime.

Those are just little ideas ...

Alain

[Warrier]

Hi Tomexx:

Are you measuring pulse width (dwell time from your machine)? If yes, then how do you define pulse width on a noisy bouncing pulse?

If you know the rising or falling edge jitter, and if you have an additional output pin, then you can output a one shot (triggered by input "noise") having width wider than bounce width and feed back to the input to "clean" incoming machine pulses.

But then you also say "I have done pulse counting...."
If pulse counting is what you need then I would suggest using the Button cmd. It has built in debouncing and state of pulse (hi or low)

Pulsin is used mainly to measure pulse width.

-warrier