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Published: Thu, 23 Nov 2017 22:33:56 GMT2017-11-23T22:33:56Z

 



LV OOP small tutorials and introductions in a "workshop style"

Sun, 19 Nov 2017 09:10:14 GMT2017-11-19T09:10:14Z

Hello!

 

Previously somewhere else I mentioned I am still a "classless" LV developer. In the last couple of years I could not find a single resource which could push me over "my barrier". Most of the resources I do not find "comfortable", or I feel big part of it just wastes my time or bores me (like the self-paced online training for OOP, with those sound player demo stuff). I am sure the problem with me, I guess other programmers are fine with the available resources...? (image)

 

So what I am doing recently, I try to collect together small pieces, smaller tutorials/workshops which give me usage ideas how I could use OOP in my projects in a helpful way.

One small example is here: https://forums.ni.com/t5/LabVIEW-Development-Best/Introduction-to-Object-Oriented-Programming-and-Hardware/tac-p/3519583/highlight/true#M572

 

I have some more complex and advanced sources for later "digestion" (here and here), but I feel I should play with small tutorials first. My question is that, are you aware of resources of simple small tutorials, or even complex ones but with a step-by-step nature to build up more advanced examples?

 

Right now what I am thinking of which parts of my projects (or my personal User Event based frameworks) could benefit from using OOP. I imagine, my recent intercom User Event/Queue/Stream messages (consisting of an enum/string and a variant) could become Classes. The immediate benefit as I read somewhere, would be that the msg data parsing errors could appear during compile and not during runtime (if I try to use the wrong data type for the "variant to data" function). Another big improvement would be to create a "RS232 class", since my projects use lots of different vacuum sensors, flow controllers, etc, all with very similar feature set and serial request/response communication scheme...

 

Thanks for any hints and advices! (image)




OpenCV

Fri, 10 Nov 2017 17:45:12 GMT2017-11-10T17:45:12Z

Since I will have some free time coming up, I have been thinking about getting into computer vision.

A post on the LabVIEW board by Bob Schor about using $80 Logitech webcam got me to thinking whether there is a cheaper alternative to learning computer vision without investing in NI Vision software.

Does anyone have experience with OpenCV?




This is "Veterans Day"

Tue, 07 Nov 2017 03:38:16 GMT2017-11-07T03:38:16Z

Yes, it is...

 

Once, I worked a 24-carry on and went home to my wife.  She asked "What should we do today?  I had just worked a 24- and carry on!  

 

Well, darling, lets go home and open my presents.

 

You get fathers day, birthday, Anniversary presents Right? Thank a vet.




Monthly bugs, November 2017

Wed, 01 Nov 2017 21:44:36 GMT2017-11-01T21:44:36Z

Continued from the October 2017 bug thread

 

The posting rules are as always:

 

  • Each post here should only contain a brief description of a bug, together with a link to the thread where it is being discussed.
  • One post/bug!
  • One bug/post!
  • No discussion of bugs. All discussions of a bug must take place in the original linked thread.



default label position, is your OCD happy with that?

Thu, 26 Oct 2017 15:51:36 GMT2017-10-26T15:51:36Z

Whenever i make label visible for a wire, my OCD kicks in, and I have to move one or two "clicks" the label upward. So the default position for me a little bit unaligned, not in the perfect center of the wire... (image)

 

Actually is it possible to change this default position in a config file or something?

 

(image)

 




Where to test your signature? Here maybe?

Fri, 20 Oct 2017 07:37:39 GMT2017-10-20T07:37:39Z

Couldn't find how to test my signature. If there is a place\method please reply. If not, feel free to test your signature in a reply (as I will).




Favorite screening interview questions

Thu, 19 Oct 2017 20:30:58 GMT2017-10-19T20:30:58Z

I saw this thread, but didn't feel like dragging it back up.

 

So, we've been trying to hire for 2 positions now for awhile and we always do a 30 minute phone screen.  I usually only get a single question to ask that will say "yes this person likely knows LabVIEW" or "nope, don't bring them in."  So, for those of you that have interviewed candidates, what are some of your favorite single screening questions?

 

Personally, I initially started with something simple - CLAD type questions.  "Tell me an example of when you would use a shift register", etc. but it wasn't very reliable.

 

I have since switched to:   "What is your favorite architecture and why?".  My thought is that if they know enough about LabVIEW to at least know the most common architectures it's likely worth bringing them onsite.

 

Anyone have any others?




How to heal hangover (free discussion) - LV analogues possible (do not code drunk!)?

Sun, 15 Oct 2017 11:31:57 GMT2017-10-15T11:31:57Z

Well. (image)

We had an interesting night, and I came to the point that I am curious about other people's hangover healing technics....

  1. Keep drinking
  2. Keep sleeping
  3. Cook something, you can take some remedy beer, but anyway
  4. "Wait until that day goes" (from a very wise old man from my village)

I am right now combining point 1. and 3. Lets see how it evolves. But still interested in that, how you people handle hangover? Recipes are welcome from other countries! (image)

 

Disclaimer: human beings should not metabolize alcohol (too much), but keep sober as we can function better! (image)

 

ps: This is for today: https://en.wikipedia.org/wiki/Pal%C3%B3c_soup

Almost perfect, but not today :https://www.youtube.com/watch?v=o-VWNnONxGc

 




Monthly bugs, October 2017

Sun, 01 Oct 2017 07:25:24 GMT2017-10-01T07:25:24Z

Continued from the September 2017 bug thread

 

The posting rules are as always:

 

  • Each post here should only contain a brief description of a bug, together with a link to the thread where it is being discussed.
  • One post/bug!
  • One bug/post!
  • No discussion of bugs. All discussions of a bug must take place in the original linked thread.



Monthly Bugs Thread, September 2017

Fri, 01 Sep 2017 13:41:51 GMT2017-09-01T13:41:51Z

Continued from the August 2017 bug thread

 

The posting rules are as always:

 

  • Each post here should only contain a brief description of a bug, together with a link to the thread where it is being discussed.
  • One post/bug!
  • One bug/post!
  • No discussion of bugs. All discussions of a bug must take place in the original linked thread.



Re: pwm based dc motor speed control using labview .vi

Wed, 16 Aug 2017 17:00:27 GMT2017-08-16T17:00:27Z

so i have daq that does not...

 

 

 

 

 

nothing really, just wanted to see your reaction to me replying on a 4 year old thread




Programming Trivia Pop Quiz: Be Different!

Tue, 08 Aug 2017 16:25:34 GMT2017-08-08T16:25:34Z

Unlike the last question, this one should be common knowledge for everybody.

 

QUESTION: Find a value that will cause the boolean to be TRUE when the code is executed.

 

(image)




Programming Trivia Pop Quiz: Make it TRUE!

Tue, 08 Aug 2017 15:34:50 GMT2017-08-08T15:34:50Z

According to Wikipedia, "Trivia" refers to bits of information, often of little importance.

 

(Questions posted here are very unlikely to show up on a CLAD exam, for that we have these other discussions)

 

I guess we could have an occasional quick pop quiz that should post no problems to the seasoned programmer, but might stump some of the newcomers for a few minutes. So here is the first one:

 

QUESTION: Given the code shown in the image, find four different inputs that will make the output TRUE when the program is executed.

 

(image)

(Any numeric datatype is allowed, that's why the wire is currently a generic black. All primitives are straight from the palettes. No fake modifications or hidden custom code).




Monthly bugs, August 2017

Tue, 01 Aug 2017 13:30:29 GMT2017-08-01T13:30:29Z

Continued from the July 2017 bug thread

 

The posting rules are as always:

 

  • Each post here should only contain a brief description of a bug, together with a link to the thread where it is being discussed.
  • One post/bug!
  • One bug/post!
  • No discussion of bugs. All discussions of a bug must take place in the original linked thread.



Invert three signals with only two NOT gates

Wed, 12 Jul 2017 11:27:24 GMT2017-07-12T11:27:24Z

Few days ago I've seen nice "breakfast exercise" for the brain in one forum.

You have three separate booleans, which needs to be inverted, and you have the only two "NOT" primitives available. Also you can use any suitable amount of the "AND" and "OR" logic, but no "XOR" (and bundling into clusters or arrays also not allowed, of course). Start point:

(image)

This funny task coming from old school electronic, when engineers trying to use as less inverters as possible. You can easily found an answer in the Internet, but it is quite interesting to solve it (at least was for me).

 

Good luck!




Favourite sci-fi books?

Sun, 09 Jul 2017 16:47:22 GMT2017-07-09T16:47:22Z

I wonder if there are sci-fi literature lovers here? If so, favourite books? Can be old or either contemporary.

 

For me, the all time best of is the Hyperion Cantos. It is just the most amazing story I ever read (well, I think I read the books like 4 times? (image) ). 

“The universe is indifferent to our fates. This was the crushing burden that the character took with him as he struggled through the surf toward survival or extinction. The universe just does not give a **bleep**.” 

 

Hmm, when I was a kid, beside the big classics, like C. Clark, Asimov, Stanislaw Lem, and so on, I really enjoyed the book Ender's Game (the movie is real bad). Ah, and a very special one from Alfred Bester, very unique story from 1957 (!): The Stars My Destination, or Tiger!Tiger! Very powerful book, starts with the famous poem from Blake! (image)  

"Tyger Tyger, burning bright,
In the forests of the night;
What immortal hand or eye,
Could frame thy fearful symmetry?" 

(image)

 




1 Million LabVIEW Posts Reached

Wed, 05 Jul 2017 16:28:51 GMT2017-07-05T16:28:51Z

The LabVIEW forums just reached a post count of 1 million!

 

The forums are a great place to learn about LabVIEW, and get specific questions answered quickly. I know my applications would have many more unresolved issues (or goofy workarounds) without some of the great advice I've gotten here. Thank you to everyone who has made this a great technical forum! 




Monthly bugs, July 2017

Sat, 01 Jul 2017 17:26:04 GMT2017-07-01T17:26:04Z

Continued from the June 2017 bug thread

 

 

The posting rules are as always:

 

  • Each post here should only contain a brief description of a bug, together with a link to the thread where it is being discussed.
  • One post/bug!
  • One bug/post!
  • No discussion of bugs. All discussions of a bug must take place in the original linked thread.
 



NI Days London - Registration Fee?

Wed, 28 Jun 2017 19:56:37 GMT2017-06-28T19:56:37Z

I received the email from NI UK this morning with regards to registration for NI Days London is now open. I noticed that they mentioned a registration fee and on looking on the website was pretty shocked that they're charging £150+VAT (early bird) or £250+VAT for entry to NI Days.

 

Previously, I have found NI Days to be a useful event for networking and catching up with old colleagues, but found it to be fairly poor from a technical point of view - it seems to be mostly aimed at new LabVIEW users (hands on sessions etc.) and/or as an NI marketing exercise. I also recommended that colleagues went in the past when they were offering the free CLAD and CTD exams during the day as this definitely made it a very worthwhile day/trip.

 

I've spoken to a few other colleagues about it and can't find anything to suggest what NI Days @ £150+VAT is now offering over the previous 'free' NI Days of the past.

 

This doesn't seem to be a global move - the NI Days in Copenhagen is still free to register for. I had a look at flights and it would actually be cheaper for me to fly to Copenhagen for 3 days than to attend the London event?!?!

 

I know that NI Week has a registration fee, but it also offers vastly more high-level technical content over multiple days to justify that. I imagine that it will have a pretty significant impact on attendance.

 

Does anyone else have any thoughts/comments on this? Is there something I've missed that's coming to NI Days in the UK to justify the cost?

 

 




Link to NI week technical presentations

Tue, 27 Jun 2017 17:31:55 GMT2017-06-27T17:31:55Z

Hello,

 

I am trying to find a link to the 2017 NI week technical presentations.

 

Specifically I am looking for a presentation on malleable VI's and a presentation on LabVIEW NXG

 

Thanks