How to control TTL device using LabVIEW?

[ddeng]

I have a device which requires TTL (+5V) to control it to be on/off. How can I provide this TTL to it using LabVIEW? I guess I should install a PCI board in my computer to connect to this device, but how to do my LabVIEW coding to control it?

[Dennis_Knutson]

You could try using the parallel port. There's an application note here. You could also, of course, buy a digital I/O or DAQ board. LabVIEW comes with numerous examples for using either.

[nicut]

Hi,
First of all if your board is NI board after corect instalation you need to view this board in the section Devices & Interfaces from the NI program Measurement & Automation Explorer.
Also if the board is NI board or has the divers for LABView you need to find in the LabView the functions to command your board.
Other posibility is if your board is no't compatibile wi NI, in this case you need to extract from DLL, the function to command the board.
By