AnalogKid2DigitalMan

QUOTE(orko @ May 24 2007, 12:57 PM)

This is no joke. I just went through a disk cleanup* and defrag (used the O&O defrag trial) and my launch time of LV8.2.1 after reboot went from 32 seconds to 23! Granted, the other versions of LabVIEW probably would have also sped up, so it doesn't improve the relative benchmarks... but I'm much happier as a result. Good tip! :thumbup:

(*) as a side comment/tip, I never really liked using the XP disk cleanup tool, since it always hangs up for a long time on the "compress old files" analysis (especially since I never compress old files). Very annoying. I just found an awesome tip however from one of the knowledge bases that takes care of that little problem! http://support.microsoft.com/default.aspx?scid=kb;en-us;812248' target="_blank">KB812248 ... it now takes literally seconds to scan and clean up my old junk files!

I always cleanup/defrag prior and post to any software package installation and uninstall, especially DAQmx and LabVIEW. The drives usually bleed heavily in the red.

QUOTE(xtaldaz @ May 23 2007, 01:26 PM)

Don't bring them to AZ this weekend

Yeah. Sheriff Joe will lock you up in tent city. And were getting back into the 100's in Phoenix. Not a pretty sight.

From The Salt Lick's home page:

You've found "The Salt Lick" so named by owner Hisako Roberts and her husband, the late Thurman Roberts, because "a Salt Lick is something where all the animals congregate. There is something good, something essential about it."

Since alpha has deemed that 97.73% of us are at animal level, I think the place is going to be packed.

Sounds like a good time!

Here's the page I was looking for:

http://teslamania.delete.org/frames/frameindex.html

Click on the Big Arcs and Sparks link

That arc in the Nevada substation was 100 feet in length! Look down to the 3rd or 4th topic on that Arc/Spark page for a description of that test.

There's also some cool videos regarding high power tests and disasters, click on the images to play the videos.

I found an other remarkable video:

But does it work with BEER?

I have driven by that substation many times on the way in/out of Las Vegas. Pretty big facility, it is part of the Hoover Dam grid.

Here is an explanation of Basic Electricity:

Maybe the topic of this thread should be changed to CRELFarray.

Or something to do with clones and re-entrant vi's

Crelf-

You let the smoke out. You know electronics won't work any more after you let the smoke out.

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

QUOTE(Nullllll @ Mar 23 2007, 01:19 PM)

it does not work!!! how can i do it

Have you tried sending it a Nullllll String??

Please post what you have so far.

You remind me of someone(s) else.

Yen- Nice site you linked

QUOTE(dthomson @ Mar 22 2007, 12:42 PM)

>The good ol 7805 is a robust 5V regulator. Heres a link for a sample circuit.

The 7805 is simple to use and a great solution for many situations. Keep in mind the efficiency, though. Running a 7805 off 12 volts means you'll get less than 40% efficiency, so for each Watt of 5V power you use, you'll be putting 1.5 Watts of heat into your system. A DC-DC converter, on the other hand, can be found with at least 80% efficiency, so the same 1 Watt of 5V power would only dump 250mW of waste heat. Since you mentioned that it is a low power system and you were concerned about efficiency, I thought it might be worth pointing out.

Dave T

Good point Dave. I took low power to mean low current requirements on the load, not that it was power limited. Power consumption is the crirtcal issue- taken from a battery, I figured his system had other power sources to power it. Not too many details to go on.

Why use LabVIEW when here's an optimal solution for under $200 USD, sure you can get extra credit for thinking outside the box.

http://www.omega.com/iseries/i32/i32.htm

tst hit the hail on the nead (so did chris) over at ni forums:

http://forums.ni.com/ni/board/message?boar...ssage.id=236787

QUOTE(Thang Nguyen @ Mar 20 2007, 08:20 AM)

I also need a voltage converter from 12V - 5V. Because this is a low power system, I want to look for a good converter. Could you recommend me any product?

Thang:

The good ol 7805 is a robust 5V regulator. Heres a link for a sample circuit.

http://www.eidusa.com/Electronics_Voltage_Regulator.htm''>http://www.eidusa.com/Electronics_Voltage_Regulator.htm' target="_blank">http://www.eidusa.com/Electronics_Voltage_Regulator.htm

I haven't built my first installer in 8.2 yet, but have also wondered why MAX shows run-time engines for 7.1, 8.0, and 8.2 with a fresh LV8.2 installation.

Todays feature on APOD- The 5th dimension! Get your red/blue glasses out!

http://antwrp.gsfc.nasa.gov/apod/ap070318.html

Does the package need a 'wrapper'? Or will it natively spawn?

Gary:

I ran your original vi on my older Dell Precision 370 2.8GHz single core (circa 8-2004), 512M RAM (185M free) LV8.2 Win XP SP2. 81-82msec consistently (FASTER)

The original test I ran was on a Precision 380 circa 5-2005

I do not know RAM specifics, but using AIDA32 I did memory Read/Write tests.

Pecision 370: Read 5274MB/sec, Write 2081MB/sec

Precision 380: Read 5578MB/sec, Write 2152 MB/sec.

Do not know why the slower 370 memory executes faster.

LV 8.2 1st run 166, 2nd run 106, 3rd through 5th runs 96-97. LV freshly opened with your code

Running P4 Duo Core 2.8GHz, 1G RAM (500M free), Win XP Pro SP2.

It was odd that the first run was so slow, 2nd run was faster, subsequent runs faitly repeatable. Maybe an initial memory allocation?

Sorry, only 8.2 available to me.

Gotta love the ads.

Crelf- you got a bunch of alcohol related ones under your post. What you puttin' in that tea boy?

The 5th dimension goes on, almost to 10 pages. It absorbs everything.

Presuming you are running under a Windows OS, such timing cannot be achieved in software. There is just too much overhead from the OS, in addition when another process takes prioirity over your vi, timing will become slower and unpredictable. You could look at timed loops though, but performance may not be up to your requirements.

You need a hardware solution- a DAQ card with counters/timers to get short duration and accurate pulse trains with adjustable duty cycles. Or possibly LabVIEW RealTime (RT). Another alternative, since you are attempting motion control is to get a dedicated motion control card.

Current versus Voltage yields Resistance. Resistance to learning?

From block diagram, select Dialog & User Interface Functions, then Prompt User for Input function (an Express vi)

alnaimi: May I suggest as part of your LV learning, take the time to go through every function pallate available to you and browse through each of them to see what canned functions are available. Not that you should build a vi around them to test and try each one, but rather let what is available to sink into your mind. Then when you have a task to accomplish, draw on your memory to say- ah, yes, I remember seeing a Max and Min function for an array- that could be of use for what I have to do.

Create an executable?

Contact Keithley Tech support?