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GSR

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  1. simple NI-DAQmx simulated device

    in Hardware

    Posted

    To make it clear

    Here is what I mean of stopping the DAQmx stimulated device. I do from step A - E; and step E is what I mean stopping the DAQmx stimulated device. 3. Use the NI-DAQmx Task in VI Logger Lite to complete a data logging application.

    a. Open VI Logger Lite. If you do not have VI Logger Lite, download it or request a free CD.

    b. Right-click My System>>VI Logger Tasks and select Create New.

    c. Select Using NI-DAQmx and click Finish.

    d. Select the NI-DAQmx task for the NI-DAQmx simulated device. Leave all settings in the defaults, and click Run task in the toolbar.

    80d5fe691080.gif

    Figure 9. VI Logger Lite data logging task.

    The data logging task begins. Data from the NI-DAQmx simulated device is displayed in the Real Time Data viewer.

    e. Click Stop task.

  2. simple NI-DAQmx simulated device

    in Hardware

    Posted

    I read this article "NI-DAQmx Simulated Devices" ( ). And I am trying the example code " Cont Acq&Graph Voltage-Int Clk VI ", follow exactly what the webpage say.

    However, I don't understand

    1. Don't understand how to use stimulated device; and the point of having Logger.
    2. Why I can keep reading data by using the example code in all the following setting?????

    • I stop the NI-DAQmx simulated device (without closing the program, still have DAQmx task) after generate a sine wave (one hundred points). There is 1 VI Logger task. I run the example code. The example code can continuously read data.

    • I stop the NI-DAQmx simulated device (without closing the program, still have DAQmx task) after generate a sine wave (one hundred points). There is no VI Logger task. I run the example code. The example code can continuously read data.

    • I stop the NI-DAQmx simulated device and (close the program, still have DAQmx task) after generate a sine wave (one hundred points). There is no VI Logger task. I run the example code. The example code can continuously read data.

    • I stop the NI-DAQmx simulated device and (close the program, DO NOT have any DAQmx task) after generate a sine wave (one hundred points). There is no VI Logger task. I run the example code. The example code can continuously read data.

  3. generating x-y co-ordinates

    in LabVIEW General

    Posted

    QUOTE (faisaldin @ Feb 23 2009, 03:42 PM)

    hi,

    i have to sense a x-y co-ordinates from a touch screen and send them to the PC.

    Do anyone have some idea about how a real-time co-ordinates can

    be generated on a just like a small screen(area) in labview.

    such that the small screen (area) in labview gives the sensed

    co-ordinates showing some kind of indication.

    and most specially it allows me in (real-time) to generate output from PC

    vice versa.

    such that if i draw something on the screen (area) within labview

    it generates the co-ordinates for the output.

    thanks....

    any tutorial any supportive material regarding it....please post

    I did similar thing a year ago. I wrote a program to track the path of moving cursor on an empty plot. I use property node to find out the cursor X and Y coordinate.

  4. Reading the data using labview and parallel port

    in Hardware

    Posted

    QUOTE (sky @ Feb 23 2009, 10:59 PM)

    Hi there ,

    I can write the data into my circuit by using parallel port and labview but i have problem with reading the data such as temperature reading. My circuit consist of temperature and light sensor which connected to 8-bit mulltiplexer and the output from the multiplexer is connected to ADC converter. Then the ADC is connected to the parallel port and i have done the configuration for the pins , pins 2-9 of the parallel port is connected to pins 11-18 of ADC and the control pins 1, 14, 16 and 17 are connected to the multiplexer so the multiplexer can swich one of the inputs to the a common outputs so i want a code that can read the output dispaly it in labview . I need code that can read and display the temperature reading.

    Can anyone help me please

    Thanks

    You can get the idea by reading "parallel port read and write loop" example in your LabVIEW

  9. AO/AI to DAQmx questions

    in Hardware

    Posted

    Dear all,

    I need to rewrite a program which use the traditional DAQ vi. I could not find those VI in my LabVIEW 8.5, but I need to understand the meaning of those VI to rewrite the program using DAQmx. Here are my questions

    In A, what is the meaning of AO config with AO and AO1 input? Should I use two separate DAQmx Create Channel VI to replace "A" ?

    Ignore B

    In C, what DAQmx VI should use to replace singal update VI?

    In D, what DAQmx VI should use to replace AI S-scan VI?

    In E, I don't understand why Trigger config is connected with the AO write (output related). Does the Trigger config VI control the AO write??

  11. find the 1st element which is larger zero in an array

    in LabVIEW General

    Posted

    Dear all,

    I am converting my Matlab code into LabVIEW block diagram because my current computer does not have Matlab. I have a few lines of matlab code to find the 1st element which is larger zero in an array, but I have no idea how to convert it into LabVIEW block diagram.

    I used flag and if-else in Matlab, so "" if (flag is not ON and array>0)"" can give me the result. I was trying to use the case structure to replace the if-else structure in the Matlab code, but the case structure has to connect to output for both true and false conditions. :wacko: Any suggestion?

    btw, can you see my personal photo under my name zmarcoz on the left column? if not, what should I set to display my picture?

  12. storing values

    in Application Design & Architecture

    Posted

    QUOTE (vultac @ Feb 8 2009, 07:01 PM)

    Hi guys, Would like to ask if i use a for loop and keep on loop for eg multiples of 8... and i want to store the outputs and display out all of them later...in what ways could i do it? thanks!

    You can use "enable indexing" in the for loop to store the output of each element into an array, then you can display the whole array later. :)

  13. Email function (SSL)

    in Remote Control, Monitoring and the Internet

  14. looking at files in a folder

    in Database and File IO

    Posted

    QUOTE (tilli @ Feb 6 2009, 12:21 PM)

    hello,

    I am using tshark's ring buffer to create 3 file that update automatically, the file names are saved with the time and date so they are changing, in labview i want to read the files and convert them but i am getting confused as to how to input the exact name of the file as it keeps changing, i was thinking to using somesort of time stamp of the files in the folder but i am still very stuck.....

    it will be really helpful if anyone can help,

    please contact me if you want any more information

    samia

    If I do that, I will use time stamp to create the file names and STORE the update file names in a txt file. That means total 4 files, the name of 3 of them will keep changing and the updated name can be found in the "STORENAME.txt" (fixed name) file. I hope I understand your question correctly. ;)

  18. Anyone care to critique my security system?

    in LabVIEW General

    Posted

    QUOTE (jcarmody @ Feb 6 2009, 07:08 PM)

    I see! thanks! I misunderstood what system label was. I thought system label was using edit text function to put text on the block diagram. Now I understand that there is a system label function to label the wires. thanks again :P

  20. My CLD plan

    in LabVIEW General

    Posted

    QUOTE (zmarcoz @ Jan 21 2009, 04:36 PM)

    ===============================================

    Meanwhile, rewrite resume, look for job, AND prepare SCJP (Feb 6)<=== $60 after student discount

    JAVA is too difficult; and I cannot finish reading all material by today. :oops: And I need to reschedule the SCJP exam to Feb25. By the way, thanks so much for people who read my resume. I lose one interview because I can't work until Apr1. However, I should have an interview for a LabVIEW programmer job at the end of the month. Thanks for everyone :worship:

  22. control parallel port question

    in Hardware

    Posted

    Dear all,

    I read a few sources of control parallel port because I have a question of controlling signal bit in parallel port.

    • One of them use "out port vi", but what is the register address to go to the VI and how I can find out the address.
    • The other one suggests to use VISA, I used VISA to control serial port. However, I have no clue how to use VISA to control a signal bit in parallel port.

  23. Could you please read my (a labviewer) resume?

    in Job Listings

    Posted

    QUOTE (Louis Manfredi @ Jan 22 2009, 02:30 PM)

    --Be that as it may, no excuse for them not finding out-and-out grammar errors!

    As a non native speaker, I really don't know how long will it take for a native speaker to read 2 pages

    The staff in the career department spent no more than 15 secs to read my resume

    Since I read so many times, I could not find out any other problem myself (I am weak to find the "s" problems)

    I thought they were professional and could read my resume in very high speed;

    I also thought my proof reading was good enough.

    Therefore, my resume has so many mistakes

    Thanks so much for reading my resume

  24. Could you please read my (a labviewer) resume?

    in Job Listings

    Posted

    QUOTE (jdunham @ Jan 21 2009, 08:39 PM)

    Mike is right, the length is not a deal-killer. But relating back to the original resume, zmarcoz, your "courses" include. math, EE theory, electromagnetcs, circuit design. Holy smoke, you've got two degrees in EE. Of course you took those classes, so why are they cluttering up your resume and obscuring all the interesting stuff. I think you should take out the "Courses" section, and then under each Eductation item, put the 2 or 3 most interesting/unusual classes from your list.

    I would consider the same thing with the skills, though some people like to see them listed separately. For me it's more interesting to see the context in which you used them, like when you say you used LabVIEW in your research project. The middlemen are just going to grep your resume for the right words with automated software, so they could care less where you list them. No one cares if you know Microsoft Office. If you can't learn it in 30 minutes, then there's a serious problem. If you're great at Excel Macros and VB for Applications scripting, you should mention that.

    On to the Experience section: Prepared Course Materials, Supervised students, Evaluated and graded... - again all those are obvious, since you were a TA and all, and at the very least could be removed or combined into one item. I think each experience of yours could be condensed to 3 items, maybe 4.

    With all that, you should be able to get your resume down to one page and still tell Mike an interesting enough story about yourself.

    Very good guideline, thanks

    Thanks for everyone

    I could not get any help when I was in school. Even if the staff in career department read my resume, she did not point out any problem.

    By summing up all suggestions, I modified my resume. Now it is 20% shorter, and straighter to the point

    Feel free to give me more suggestions :worship: <== the first time I see this icon, and it is very suitable to use it here

  25. My CLD plan

    in LabVIEW General

    Posted

    Originally, I wanted to do the exam with 2 months.

    I change my mind after many people give me advice

    My plan is a week or two after May5, 2009. Why?? Haha :P

    Because I will get 200 dollars voucher on LabVIEW developer day will be on May5 at D.C. (I am living in MD, and I have already registered for it.) (.............I have a question, I registered online, but I still have not get official response/reply from NI. When I will get their official acceptance??)

    A friend of mine gave me the intermediate I and II manuals. Yes, manuals only, not included any practice excises. Do anyone want to sell his/her intermediate I course kit?

    I also borrow "The LabVIEW style book" by Peter Blume; and plan to read it after fisinh the course manual

    Any suggestion? Any way that increase my chance to pass CLD?

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