How can I use labview and the NI 4351 board to generate a 5V TTL signal.

[doctorj]

I have a photodiode trigger for a camera. I need trigger a TTL signal to my camera when the diode detects light. I have already got an indicator light on the screen to turn on when the minimum voltage level is reached by the analog output. I do not know how to go from the trigger function to actually generating an external pulse. I have limited labview experience, so please be specific.

Thanks,

Justin

[Labviewguru]

Check the examples database for examples on outputting digital pulses. This will be the best way for you to figure out how to do it.

[Mike_T]

Justin,
The 4351 is equiped with 8 TTL compatible digital lines. These digital lines are static lines, which means that they will remain in the state that they were set. These are not ideal for pulse trains, but for triggering devices. As long as you are not going to draw a lot of power you can use these lines. To activate one of the lines simply use the digital functions and assert the specified channels high and then low. Look at the Digital Examples that came with the 4351.
Good luck.

-Mike