labview square wave measurement problem

[GerdW]

Hi Asrih,

why do you want to compare a boolean signal with "greater equal to TRUE"?

This is a classic Rube-Goldberg (and not needed at all)!

[N.Asrih]

Hi GerdW,

so if i take that out (greater/ equal to true) out the LED will stay on if the signal of the DI1 is high/low?

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With kind regards

Asrih

[N.Asrih]

but the problem is, if the signal is off the LED should go off too. if the signal is on the LED should stay on and not blink

[GerdW]

Hi Asrih,

the "boolean2" LED will stay TRUE once a TRUE value comes from this subVI in your image.

if the signal is off the LED should go off too. if the signal is on the LED should stay on and not blink

There's a contradiction in these sentences!

Should the LED go off with a FALSE signal - or should it stay ON?

[N.Asrih]

Hi GerdW,

it should go off.

With kind regards,

Asrih

[GerdW]

Hi Asrih,

when the LED should go off/FALSE, when the input signal goes FALSE, then it will blink…

What exactly do you want to achieve? Please define your goal without contradictions!

[N.Asrih]

Hi GerdW,

look this is the case,

im making a test for PCB, it has a emergency switch and a buzzer.

case 1: emergency switch isnt pushed, buzzer makes no sound and therefore the LED in my program stays off

case 2: Emergency switch is pushed in, buzzer automaticly makes sound (in a square wave form therefore the simulation). but if i put this in the program the LED will blink.. because the signal is high/low what i want is that the LED will stay on.

(english is not my native langueage thats why i cant explain it very good)

With kind regards,

Asrih

[GerdW]

Hi Asrih,

then use the suggestions above to store the TRUE state in a shift register!

As long as your hardware only delivers FALSE values the LED will stay FALSE. As soon as the first TRUE is returned the LED will stay TRUE…