voltage read from arduino convert to frequency in labview

[heman2099]

hello.. i am working on a project where i have to detect pulse from wrist. i am using pulse sensor that i have interfaced to arduino. i am using labview to read the analog voltage. 

how can i measure the frequency of a pulse from analog voltage?  please help me out asap

along with this post i am enclosing my vi...

[crossrulz]

Compare your voltage to a threashold and keep track of how many samples were read between the crossing of that threshold.  Assuming your samples are taking at a constant rate, you just divide the number of samples by the sample rate.