thomas2609

Hi, i wonder if already anyone tried to use ocr software with labview. who has an idea about how this could work?

looks like the problem is the mailserver configuration... not labview.

just google for the error message and you will finde everything you need

maby he should use a servo motor and try to generate a pulse with modulated signal :-)

but he would need a bit more than a 6009 ...

first find a data sheet of your sound card;

there you should find all important parameters; (cannesl, sampling rate, inputvoltages......)

input bandwith is about 20 Hz to 20 kHz (mind Nyquist–Shannon sampling theorem)

so you can measure 2 channels if you have a stereo(input) soundcard.

to use the soundcard in labview, just use the sound vi's

a wave file is nothing more than measured values and the sampling information ( dt = 1/sampling frequency)

thomas

ZITAT(blueguard @ Feb 4 2008, 04:26 PM)

I am in my last year in mechanical departement ,and my project is about machine vibration diagnostics and analysis , but i can not pay for an NI DAQ card ,so that i am planning to use the PC soundcard as a data acquisition card , and i do not no to what extend the soundcard is valid for this purpose, especially for multichannel measurements , and how i can interface the sound card to Labview? :question:

maby someone needs my vi to get the default printer name .

i did a file dialog, some time ago, with active-X, see

http://forums.lavag.org/reading-multiple-f...7519#entry27519

also tried it with .net but hade the same problems with dialog not on top.

but since i upgradet to LV version 8.0.1 i don't see any need to programm a

file dialog on my own. instead i perefere the built in file dialog.

ZITAT(TiT @ Jan 14 2008, 10:18 AM)

Does this actually works for you ? I have WIN XP Pro and for me the only information that is correctly read is the timezone, all the other information that are read do not correspond to the actual windows date and time ; and the write function does not seem to have any effect

i do have the same problem, but Bias is correct!

ZITAT(LV Punk @ Dec 19 2007, 06:13 PM)

There are some nice Timestamp related functions in the MGI Freeware VIs.

You can use VI Package Manager

to install them.

also on http://zone.ni.com/devzone/cda/epd/p/id/18 there are some example VI's, how to get Windows timezone information (from kernel.dll).

Example is quite interesting if someone has to deal with WCHAR.

ZITAT(TiT @ Dec 19 2007, 11:49 AM)

Hello,

In order to get the correct local time with a timestamp in countries that have a summer time and a winter time (daylight saving stuff) the property has to be disabled in windows.

So my question is, how to programmatically enable/disable this windows option ?

Thanks in advance

why you don't you just read out the system time through kernel32.dll (see atached example LV8.0)?

thomas

i recently compiled(+ made an installer) a LabVIW (8.0.1) program in which i used the ActiveX controll MSComDlg.ICommonDialog.

on my developement system i had visual basic 2005 express installed, so i had no problems using ActiveX. but when i

installed the program on a other system without any developer license (so no VB2005Express) installed on it, i got the error message again.

now i wonder where i made any misconfiguration, would it be neccesary to add some M$ VB Run-Time Redistribution Pack?

Thx for any information

cheers thomas

Hi, i wonder if anyone ever tried to make an AM reciver with a Ni DAQ card.

cheers thomas

my version of multible files select using active x.

if you encounter MSComDlg.ICommonDialog "Class is not licensed"

see http://forums.ni.com/ni/board/message?boar...ssage.id=214513

you can fix that by installing for example

visual basic 2005 express

http://msdn.microsoft.com/vstudio/express/

ZITAT(AnalogKid2DigitalMan @ Mar 28 2007, 11:45 PM)

It can be a bear, your are not the only one- battery power does seem to work as thomas2609 pointed out (see Mark's post in 2nd page of this thread). It seems like the front end of the 600x's input is the culprit.

http://forums.ni.com/ni/board/message?boar...ding&page=1

as an alternative i figured out a way to drive the lm35 with the ni600x +5V internal power.

see http://cache.national.com/ds/LM/LM35.pdf ( >> FIGURE 5 <<)

so you need 3 additional resistors and can measure in differential mode. (very nice!) ;-)

as i need the lm35 only for demonstration i don't worry how exact resistor values influence the accuracy of the measurement (i used 220 Ohm instead of the 200 Ohm).

my guess is that the error will be >10%

i hope that i could provide some help on the topic

cheers thomas

ZITAT(SteveL @ Oct 10 2006, 10:39 AM)

My previous post concerning thermistors resulted in my sending a thermistor to NI (UK). The engineer wanted to have a go at making it work with a USB-6008.

He is still working on the problem.

hi, i know the problem, i guess it depends on the input circuit of the 600x (see http://www.ni.com/pdf/manuals/371303e.pdf page 10) compare with http://www.ni.com/pdf/manuals/371022g.pdf page 37;

a workaround to connect the lm35 to the 6009 would be to use an external power source like battery or other dc power supply.

i did that with a patery pack like http://www.mercateo.com/p/115-970332/Batte...XLR03_AAA_.html (~1,50€)

4 AAA (6V) are ok for the LM35 (supply voltage acording to the data sheet 4 - 30V)

with this configuration you can use the differential mode to measure the temperature.

Bat+ connect to +Vs

Bat- connect to GND and AI4

Output connect to AI0

I am sure there is a better solution, but at least it works ;-)

cheers thomas

"use localized decimal separator" worked, after restarting labview.

thx for your help thomas

hello,

i just wonder why only one of these 2 Math scripts workes.

1.) x= 0:0.1:1 does not work in LabVIEW 8.0 but In MATLAB

2.) x= 0:1e-1:1 workes in LabVIEW 8.0 and in MATLAB

ad 1 error message "Error in function range at line 1. You cannot specify a step size of zero for a range."

aha, well 0.1 is not zero in my eyes. can anyone tell me whey my LabVIEW 8.0 does that?

my guess whould be that it is a bug. :-)

cheers thomas

i recently had the problem that i wanted to run a DAQcard 1200 under labview 8.0. i had a lot of problems bringing it to work. so i called the ni helpdesk and got a very helpful reply.

the link they sent tells what to do, step by step.

maby it helps someone else too.

How Do I Use Older Versions of NI-DAQ (6.9.3) with LabVIEW 7.0, 7.1, or 8.0?

http://digital.ni.com/public.nsf/websearch...B2?OpenDocument