Implement a count down timer

[nickemp1996]

I was hoping someone could help me implement a timer inside my for loop. The for loop executes the same number of times as the size of an array given by the user. I need to have a countdown timer that takes in the number of seconds calculated from another subVI I have. I have a picture attached, hopefully it helps

[billko]

Can you use the elapsed time express VI?

[nickemp1996]

How would I do that? I would like the timer to countdown at least every two seconds, preferably every second

[RavensFan · Accepted solution]

The express VI will give you how much time has elapsed.  So to countdown, just subtract that from how much time you want to start from.

[nickemp1996]

Would an implementation like this work?

[RavensFan]

That looks like it would work.

Actually, there is an error in you upper shift register.  You don't want to subtract your value from the shift register.  You want to subtract it from the target.  Get rid of the upper shift register.

Note, the lower shift register serves no purpose.

Keep an eye how the express VI is configured with respect to Reset and Auto-Reset.