TTL Triggering Camera

[acolel]

Hi! 

I'm trying to trigger a HS camera using myDAQ. At the moment I'm not trying to do anything fancy, just take a single picture that I've triggered using LabView.  I have the camera wired to the DIO and I'm using the DAQ assistant VI, but nothings happening.

Thanks!

Acolel 

[ShishKeBobby]

Hi Acolel,

You sent one of the DIO lines high and then nothing happened? What do you mean by nothing happened? Can you confirm the line went high without using the camera? I would suggest going into MAX and using a test panel to send a line high to see what your camera does. This will isolate this down to either a LabVIEW programming issue, a myDAQ issue, or a camera issue.

Regards,

[acolel]

Hey Bobby! 

So I used the DAQ Assistant with a single Digital line out. The thing is it'll work once, but if I try to run the program again it never works (unless I unplug the DAQ and plug it back in). I'm guessing I need to have something reset the DAQ at the end of the program? I tried just wiring a clear task and that didn't help. Ideally I want to put the trigger in a loop. 

Thanks!

[Dennis_Knutson]

After writing the line high, are you then writing it low? The device won't do this on its own. You have to set it.

[acolel]

That makes a lot of sense actually. So if I'm using DAQ assistant to send it high, how would I write it low?

Thanks!

[Dennis_Knutson]

The exact same way you write it high with a second assistant though using the lower level DAQmx Write would be more efficient. You wire the task out of one to the task in of the next with a delay function in between using the Error out/error in connections. This will give you some control of the pulse width.