I also tested in another arduino nano that i have, and still the problem is there.

My questions are: What i am doing wrong?, Is there something really obvious that im passing?, Is Arduino the problem?, Should i use VISA instead?. I tried to change the frequency of the 555 to something higher and it doesnt seem to resolve the problem. Also i have some noise when im not acquiring anything. So everything it's working BUT, when im acquiring the signal, the display, the frequency doesn't match with the acquiring signal im testing. The circuit produces a 1HZ (approximately) square signal.(The circuit example below,). My first aproach was to use LINX, but i couldn't make it work, So i decided to use LIFA(I know it was been discontinued, so i use Arduino 1.8.5 to avoid problems with the Frimware), since LIFA has Analog and Continuous sampling VI's.ДЇor testing purpouses i'm using (In real life) and LM555 with a low pass filter. I'm new to this topic of signal acquisition. I've design an interface were you can introduce the acquisition speed and the number of samples, and with a button display de data on a graph and also save the data in a spreadsheet.

So I'm trying to implement an acquisiton system with Arduino and LabVIEW.

Arduino 1.8.5 virus