How to transfer data between computer and circuit using labview?

[vishhh]

Ok , u are right. evolution rate is very high in computers.

So can u please tell me which interface should i use for this purpose.

I am giving u detials of my requirement.

- Our circuit is "Co-incidence detection circuit"

-input to that circuit is from SPCM(which is in form of TTL pulses of 20ns)

-output is also pulse train.

-i want to count number of pulses in a particular time interval

-and want to use LABVIEW for this purpose.

So please suggest me any other interface that i can use in future also.

thanks,

regards,

vishal

[rolfk]

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nirmalvishal wrote:

Ok , u are right. evolution rate is very high in computers.

So can u please tell me which interface should i use for this purpose.

I am giving u detials of my requirement.

- Our circuit is "Co-incidence detection circuit"

-input to that circuit is from SPCM(which is in form of TTL pulses of 20ns)

-output is also pulse train.

-i want to count number of pulses in a particular time interval

-and want to use LABVIEW for this purpose.

So please suggest me any other interface that i can use in future also.

thanks,

regards,

vishal

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Considering that you thought the timing of the parallel port to be enough you could probably work with a USB-6501 by just using the digital IO but the single 32bit counter time on there might actually make your measurement a lot more precise and reliable than anything you could ever achieve with a parallel port.

You might even be able to make the entire measurement with that counter only without much of external hardware at all.

Rolf Kalbermatter

[vishhh]

Considering that you thought the timing of the parallel port to be enough you could probably work with a USB-6501 by just using the digital IO but the single 32bit counter time on there might actually make your measurement a lot more precise and reliable than anything you could ever achieve with a parallel port.

You might even be able to make the entire measurement with that counter only without much of external hardware at all.

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Hi, Rolf

Thanks for such information.

I have started using Parallel port for counting purpose and i used example file of labview.

File("Parallel_ Port_data_Counter.vi") is attached with this message.

I am facing a problem with this code.

- in this program for counting i am giving "square pulses " from function Generator

to PIN NO 12 of Parallal Port.

-when I am keeping the frequency in the range up to 5k then it works good, and giving counting near to 5000 in 1 second.

-but after increasing frequency further upto 1 MHz then it can't give count of more then 20,000 in 1 second.

-Can You tell me what may be the problem, wether parallel port's capability or other?

-For timing purpose i had kept one "Elapsed Time.vi" virtual instrument (it is in "Timed_counting" file).

[vishhh]

USB-6501

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Hi, Rolf

Please also tell me how can i use USB for inputting signal?