Design and build vi's

[REXMAN]

Hi Guys,

Sorry if this has been covered before! As I am new to Labview and am finding it a bit difficult:mansad: my question is this, I need to design a Vi that will identify transitions between high,low and calculate the number of logic 1s as a percentage of total number of samples, which is up to 100. Can any one help get me started with a few pointers or suggestions on how to build this.

Thanks in advance

Spoiler

[REXMAN]

BUMP still need some help please:)

[Neos]

From where these transitions are coming 

User generated or you are getting it from some device.

Have you tried somthing or learnt state machine ( your question is not very clear but for almost anything state machines are good solution )

[REXMAN]

Hi Neos,

Thank you for your reply. this is an assighment, that i have been given by my university. The assignment would like me to design a vi that will take a TTL square wave of 100 samples, stored in an array.  from this the vi should be able to identify all the high and low logics and display them as a percentage of the 100 samples?

[Neos]

Have you done any part like how you will store the values in array.

Any attempt or something????

[REXMAN]

No not yet, as I am new to to LabView and am looking around for ideas or pointers! The array will just have numbers from 5 +- 0.5v logic high and 0 +- 0.5 v logic low

[Neos]

Hopefully you are not lookin for solution stright away

because its your homework so better you do it and enjoy.

To start with i am showing you a very rough situation

suppose you have an array. you want to know that how many elements in this array is greater than a certain threshold and what is the overall percentage of such elements to original elements.

This image is totally intended for how you can do things in LabVIEW. 

[REXMAN]

Thanks Neos,

That's very kind of you Il have a play with it on Monday when I'm back at uni. Would you be able to give me a breath description of how it works?

[REXMAN]

Hi neos,

Im having trouble locating some of the parts your using in you VI. Can you tell me what the part on the left is called numbered 1 to 4 or a breath description.

Kind regards.

[Yamaeda]

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@REXMAN wrote:

Hi neos,

Im having trouble locating some of the parts your using in you VI. Can you tell me what the part on the left is called numbered 1 to 4 or a breath description.

Kind regards.

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That's an array constant. You'll probably want an array control instead.

/Y