Hello everyone. So I'm trying to implement an acquisiton system with Arduino and LabVIEW. 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. I'm new to this topic of signal acquisition. 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. For testing purpouses i'm using (In real life) and LM555 with a low pass filter. The circuit produces a 1HZ (approximately) square signal.(The circuit example below,). So everything it's working BUT, when im acquiring the signal, the display, the frequency doesn't match with the acquiring signal im testing. Also i have some noise when im not acquiring anything. I tried to change the frequency of the 555 to something higher and it doesnt seem to resolve the problem. Noise Not the signal i want 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 also tested in another arduino nano that i have, and still the problem is there. I did 2 different VI's, one using the continuous sampling function, and the other one using the finite analog sample(this ones is the one that has better results in my opinion). I've alredy browse on all the NI comunity and i couldnt find anything similar my problem, also i've seen the examples that LIFA has, and also in those i still had the problem with the frequency. And my final note, Any suggestion or advice is helpfull. My native language is Spanish, so i apologize if there´s something misspelled. Kudos to everyone.

LabVIEW

Arduino Analog data acquisition

Hi navarro08,

May I know what kind of signal did you get?

A screenshot of the result and the program you use can help us to identify the issue.

Did you see below tutorial? Maybe you can try the example first to make sure the program and hardware is working fine.

Arduino Example: Analog Read - NI Community

Regards,

Zul

Message 11 of 12

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This is the signal I am getting! I should show 6 waves in 100 ms! I haven't gotten to set the time to show 100 ms in the X axis. Any suggestion.
Here is the vi. Thanks

Message 12 of 12

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LabVIEW

Arduino Analog data acquisition

Re: Analog sampling ARDUINO LIFA

Re: Analog sampling ARDUINO LIFA