Variable output on ELVIS board

Hi,
I need a little help from anyone experienced with ELVIS board. I’m new to LabView, and specially to DAQ tools.
I have vi that is designed to drive small DC motor using ELVIS board and Variable output.
it’s capable of driving small DC and changing speed of rotation, but I need to drive this motor in both directions.
Does anyone know is there any way to achieve this using Variable output (to change it’s polarization), or any other way to do this on ELVIS board.
Thanks in advance.
Attachments:
DC_VARIABLE.vi ‏58 KB

This propose with 4 transistors (H-Bridge) is good but then I can't use Variable supply to drive transistors, as I need two outputs which should be switchable. In other words they should be able to change polarity so oposite transistors can conduct. I could use digital outputs, drive them with PWM, but it's too complicated for me.
The best way maby would be to generate two PWM's (in quadrature) using Analog outputs (arbitary waveform generator) and H-bridge, but I don't know how to accomplish this

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How to generate 3 phase sine wave to output on ELVIS

Hi .I need to make a star or delta connected circuit on ELVIS board.2 make this circuit I need 3 wave generator( with 120 phase shift) and one common ground
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Attachments:
new.vi ‏38 KB

Hi, I am also having some problem in generating two signals from two AO. Could you please tell me how to generate two different signals from two AO. I have attached vi which generate square wave from one AO 0. I need the inverted signal in AO 1.
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Dear all,
we want to use the IODELAY2 primitive as a variable output delay, which is not really foreseen by Xilinx. The workaround, which is shown in AR34276, does not really work for us, as the signal integrity is not good enough. So we had the idea of configuring it to a fixed output delay and use partial reconfiguration to change the delay. This is in principle working fine (we got about 35 ps/step as delay), but we have observed strange side effects, like Chipscope seems to be broken or parts of the firmware do not work properly anymore, after applying the bit files via the ICAP interface.
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Designing variable output power supply

hi
could anyone help me out in designing variable output power supply ?
as i am new to this please post the circuit and also the step by step procedures in developing the circuit.

Hi rckz,
The link below has an example of a variable power supply.
http://www.google.ca/imgres?imgurl=http://howcircuits.com/downloads/circuits-and-diagrams/power-supp...
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Will the ELVIS board work with LabVIEW 2010 Student Edition?

I recently acquired a traditional ELVIS board (with the PCI DAQ board). So far I've only installed the evaluation for LabVIEW 2010 (x64), and when I attempt to install the ELVIS Traditional 3.0.5 software I get the following message: "This installer requires LabVIEW 8.5 Full Development system or later to be present on this computer. LabVIEW Base Development System in any version of LabVIEW is not supported. Please install LabVIEW and then run the NI ELVIS installer again."
I am eligible to purchase a student license for LabVIEW 2010 and would like to know if the ELVIS Traditional 3.0.5 software will install after I've acquired a student license.
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Solved!
Go to Solution.

Perhaps I spoke too soon. I purchased a student license for LabVIEW 2010 and am still receiving the same error. I've provided screenshots of my license and the message from the ELVIS Traditional 3.0.5 installer.

Elvis board

Hi, I am using labview and an Elvis board, and my task is to use a push switch on labview to turn on an LED light on the right hand side of the Elvis board. I have the switch on my front panel/block diagram, but have no idea how to wire it so that when I run the VI, I can control the LED's and turn them on and off when I want to. Does anyone know how I can do this?
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Hi Nizza52,
Thank-you for your post and welcome to the NI forums.
Looking at the schematic of the Elvis board there are a number of configurable I/O pins called LED 0..7. These pins are directly connected to the LED Array that I assume you are trying to light up.
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You can use context help (Ctrl + h) within LabVIEW to find out more about the functions you are using if you require. Let me know if you need any further help!
Regards,
Eden S
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National Instruments UK & Ireland

Data acquisation from elvis board

help me, eight samples of dc voltage acquired from elvis board(not automatically, rather with eight runs. Now i want to use these in paralell , Kindly help me how to queue these eight samples
Solved!
Go to Solution.

Dear Sir
Thanks for guiding me
In the vi there is eight bit array, i need that first sample value should go the first element of array, 2nd to 2nd and so on upto eight values. when all these are complete then next part of the system shis the first
Attachments:
Query.vi ‏124 KB

Customer exit variable output error

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Can any one please help me.
Thanks in advance.

Hi Alec,
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Valid shared variable output does not work!

I am having a problem getting the string to shared variable to function correctly. Specifically the "Valid Shared Variable?" output. It always give a false output even when I know the variable is deployed. Could it be that it only functions correctly on shared variables from the localhost and not a remote system? If so is there another way to check?
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There is a community example on this at http://decibel.ni.com/content/docs/DOC-3861
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DAQ Assistant in subvi not updating output to DAQ board with each call...

Hi All,
I am calling a simple subvi that creates a user-defined number of pulses with "Square Waveform.vi." This square wave (with the given total number of pulses) is then used as an input to a DAQ Assistant controlling an analog output signal on a NI USB-6259 DAQ board. I am using Labview 8.5 right now.
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Hi John,
I am running your code over here and seeing
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I spoke too soon. This worked in one case, but not in the following case:
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ALTAIIRE,
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"ALTAIIRE" wrote:
>>Hello,>I want to show on a screen 8 Digital values representing the state
of my>PCI6527 port. I need also to change the state of a digital output when
I>click on it.>On the LABVIEW examples, I only found examples to read OR
to write, BUT no>read/Write at the same time.>If somebody have a solution,
it would be great!>>Thanks.

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Attachments:
foto foro.jpg ‏652 KB

Variable output on ELVIS board

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