Is there a simple way to build a blink detector VI?

[SPM]

OK, so to get the behavior I want, I have to get the VI to to remember between calls when the most recent transition was. What would be the preferred way to do that? (Local variables don't seem to do the trick -- complain about type incompatibility.) -S.

[TWGomez]

I think what you want to do is to put that VI I gave you into an Event structure that triggers off of the valu change of the boolean you are passing it to, then you'd see results more like what you'd expect. OR just slow the loop down...

[TWGomez]

<Post deleted>

Message Edited by TWGomez on 04-10-2008 11:45 AM

[TWGomez]

HOLD UP!! I misunderstood your last post...post-lunch grogyness or soemthing....Try this one....After a second of no transition change it reports false...which I think is what you wanted (along with the if it changed in under 1 sec to report true) rather than just working when a value is changed...

[SPM]

I put both blink detectors into the calling VI. The second one (with the one-second holdoff) seems to work -- sometimes. But neither works if I crank the "milliseconds to wait" value up. Any idea why not?

Thanks,
- Steve.

[TWGomez]

Because of the type of mechanical action in your button the switch might not be read properly. You can either change the mechanical action or capture the event with an event structure.

You should NOT use polling to capture boolean switch events, especially with switch until release actions...polling takes up too much processing power for nothing...best idea is to use event structures.

Message Edited by TWGomez on 04-11-2008 09:06 AM

Message Edited by TWGomez on 04-11-2008 09:06 AM