Dear Friends I would to make a researching test to simulate a month of rain and sun.For that I will use 2 relays, onde for open water for rain and other for the heater (sun). The student has the days that has raining and the days that has som sun during a month.I am thinking to teel the student to tranform that month in minutes and give me a table with the start ant stop in minutes for rain and for sun. Then with a clock I will compare with that values to open and close relays. I will use a NI usb 6009. Have the people from forum a simple way to do that? The problem is that is not cyclic. So I need to input the starts and stops for rain and for sun. I thanks for any help to help me simplifying. Bestcpalka

He didn't mean to insult when suggesting you were new to LV. Clusters are a very basic data type. The example he provided is something you could drag onto your block diagram and get all of his code without having asked the follow up questions. These are things you NEED to know if you're going to modify examples. Otherwise, you're going to make changes without understanding the ramifications of your actions. It's in your, and your students, best interest to take a few of those online courses to get acquianted with the programming environment. Once you're more comfortable with the environment, it's easier to ask questions and get answers that lead you to results rather than more questions.

Hi Cross I adpated an example tha I found and seems to be what I want. I need to add for sun cycles.do you think it works for a month? About the "apparently very new to LabVIEW", I would like that you could please understand that I do many things in labview (adapting examples, leaning new thigs etc...) but my job is in researching area and this is for a new project that I will use the NI6009. Now I am fihish (with help of Nathan) a xy table from an old plotter to measure the texture of the ground and there I use the arduino + shield + labview https://decibel.ni.com/content/thread/46259 A few months ago i need to learn working with a datalogger from datataker, another way to program.Many times I use arduinos for small applications, another program language Hoppe you can understand that all years we have a lot of students with different projects and we need to improvise to make all of them. Sometimes we use labview sometimes not. (I prefer because we have some daqs from NI), but labview is not only the tool that I need all days, i need electronics knowledge, I need mecanics knowledge, because we are always doind what were never done before and we need to improvise. and if we have money of course we pay a electronic engineer, a Labview expert, etc., etc....I am a Civil Engineer and for serving the best I can my students I nedd people like you all days. Sorry for that Bestcpalka