Data Translation's DT 9835 for digital acquisition

From: nayajhen (nayajhen_at_gmail.com)
Date: 06/22/04 

Date: 22 Jun 2004 08:02:16 -0700

Hi,

Does anyone have any experience with the DT9835 USB board from DAta
Translation? If so, maybe you can help me out with some digital input
issues.

I am trying to input a small signal from a function generator of 1's
and 0's with 50% duty cycle at around 1.2V. I can see that the signal
can be detected using the QuickDataAcq program's digital input module.

However, I am not able to reproduce a similar behavior by designing my
own program in DT Measure Foundry.

I am using the Digital Input module and configured it to use Bank 0
Pin 1 as the input. I have connected this digital input to a set of 8
led displays (inside the software of course!). Also, there is a
start/stop button configured with the "switch Mode" option.

BASIC IDEA: Whenever there is a 1 on an input, that particular led is
supposed to light up and when the input is 0 the corresponding led is
supposed to turn off. All the while the START/STOP button should be
enabled.

Any ideas will be greatly appreciated. I am not able to figure out
why the LED is not blinking and why the data is just not getting into
the program. I have checked the connections and I have checked the
signal using QuickDataAcq.

Thanks in advance for any help.

Jhen.

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