when boolean is change , i want add value

[morong]

I want to add +1 to the variable value when the boolean changes.

for example like boolean ( off -> on ) just one time i want add +1 at my value

( on -> off) or ( off -> on) when this change , one time add + 1 

thanks help me 

i saw some about for it ( like use "feedback node" or " shift " ) 

but i dont know how use for my problem

[GerdW]

Hi morong,

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@morong wrote:

i saw some about for it ( like use "feedback node" or " shift " ) but i dont know how use for my problem

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Did you notice those "Training resources" offered at the top of the LabVIEW board?

It seems you could use them…

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@morong wrote:

I want to add +1 to the variable value when the boolean changes.

for example like boolean ( off -> on ) just one time i want add +1 at my value

( on -> off) or ( off -> on) when this change , one time add + 1 

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Read the help for the PtByPt-BooleanCrossing function.

Then you just need to add a select node and a shift register in your loop…

[altenbach]

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@morong wrote:

i saw some about for it ( like use "feedback node" or " shift " ) 

but i dont know how use for my problem

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As has been said, the training resources are a good start. Show us what you tried and where you got stuck!

If you already "saw" a solution somewhere here, it would help if you give us the link so we can tell you if it is a reasonable solution.  There are plenty of old discussions with examples, because this is a recurring beginner problem. (For example does this make sense to you?)

[wiebe@CARYA]

It's also relevant what this 'Boolean' is.

Is it a Boolean control? Or a digital DAQ signal?