making a counter for ttl pulses

[ehall]

Could someone help me in creating a pulse counter in Dasylab? I am using a TTL pulse to open and close a valve via a digital output, but I am having a brain freeze as to what modules I need to put together to get a display of the number of times the valve has been opened/closed. Even better, I would like to have a countdown of pulses such that the counter will know how many pulses the ttl is going to send, then count to zero.

Any help is much appreciated!!

[CJ_Butler__DASYLab_Pro]

To display the number of times that the valve has been opened and closed -- use the Statistics -->Counter module and count edges (Rising or Falling).

You can use this count to count down from a larger value by subtracting using an Arithmetic Module.

I considered using Global Variables, but, they may not update precisely enough... you need to keep the count and the countdown as data channels. Use a Trigger module to respond when the difference drops below 1.

Note -- you're more likely to get a response to DASYLab specific questions in the DASYLab forums. Go to www.dasylab.com and click on the Forums to see the page with the forum links.