Generate digital pulse from Daqmx counter

[mikeboxes]

Hi,

I have set up a counter so that when i apply an impulse signal to it, it counts up by 1.

I would like to have it so that everytime it recieves an input impulse and counts up by one, i want it to generate a 'logic high' for a short period then go back to 'low'

How would i go about doing this? I want this counter to essentially be my clock and initiate events everytime a count is recieved.

[mikeporter]

So I don't understand. When some external clock generates a count you want your daq card to generate a count to something else? Why can't that something else use the clock that triggered the daq in the first place?

Mike...

[mikeboxes]

I want to take reading from sensors every time I detect a digital edge.

If I wanted to do this how would I do it without using the counter? I want it to continously detect a digital positive edges, take a reading then wait until the next digital high edge.

[natasftw]

You're looking for triggering.  But, why add the extra component?  Trigger your reading from the external line

[mikeboxes]

Is it possible through labview to acquire a sample of the signal on a high edge trigger then stop at a low edge and repeat?

[Tanner! · Accepted solution]

Hey mikeboxes,

Here's a old-but-good example of how to do what you're asking:

http://digital.ni.com/public.nsf/allkb/BA775B0E445BFA79482571FE0032CCEB

[mikeporter]

Depending on exactly what you need to do, you have gotten a couple good ideas. In addition, if your cards supports it, you can also generate an event on a digital transition that will trigger an event structure in LabVIEW.

I believe that you can also trigger and clock timed structures from external sources.

Mike...

[mikeboxes]

ah yes, this is what I was looking for and is working for my application.

Thanks plenty!