Device Automation and Temperature Control

[johnsold]

You mentioned +5 V and -5 V earlier as the values needed to move the shutters. How much current is required?

Lynn

[akhil011235]

Actually the shutters are controlled by the shutter control box. I want to design the labVIEW program to work with the USB device which can connect the shutter controller and the computer.

So the current is obviously 500 mA[from usb port].

 Please help me................

Akhil.

[johnsold]

Akhil,

The current I am asking about is the current required by the shutter control box. When you apply +5 V to the shutter control box, how much current does it draw through that input? (Not the power supply, the control line.) Also when applying -5 V?

Knowing these values will enable determination of the kind of DAQ device required to control the shutters.

Lynn

[akhil011235]

HI Lynn,

I have had a chat with my supervisor this morning. He told me that we can use the USB 6008 for this task as by taking the ground instead of the negatives and taking it as common[ Actually It didnt make complete sense to me]! and he promised me that he can manage that!

What he told me was that to concentrate on the program designing using LabView. The shutter control has an independent power supply. It uses its own power.

Please forgive me if I'm talking nonsense. I'm in a quite nervous mood! Please help me........

[johnsold]

If your supervisor is going to handle the physical interface, then you can get to specific questions about the software.

One more thing you need to determine is whether your supervisor is using the Digital Output port or some other output to control the shutters. Your software needs to tell the correct line or port when to change so that the desired shutter moves.

The participants in the Forum will not do your work for you, but we are glad to answer questions. So please ask when you have specific things you do not understand.

Lynn

[akhil011235]

Hi Lynn,

We will be using the analogue output.

I dont want you to do my project.

What I need to know is the starting point. How can I start? Can you give me an idea about how to start a block diagram for such a task?

[johnsold]

Start by looking at the examples for analog output. Under the LabVIEW Help menu look at Find Examples.. The location and name of the examples may depend on your OS and DAQ drivers installed. Try some of the examples and open their diagrams to see how they work.

Lynn

[akhil011235]

Hi...

I am attaching a VI which i have just designed. I'm not sure whether its what I want.

My objective was to design eight +5V DC seperately through the eight DIGITAL channels. I want to switch on and off the eight channels individually.

Please look at the VI. I'm using USB 6008. Can I generate +5 V through each of the eight channels? Please help........ I'm new to LabVIEW.............

[MikeS81]

Hi akhil0112… ,

the loop has to be around the "DAQmx Write.vi". All vi´s after the while loop run first, if you press the stop button.

Try the attached example.

Mike

[akhil011235]

Hi Mike......

Thank you so much. It was a great help.

Still I'm confused about the output voltage. Where can I assign the output voltage? Actually I need +5 V each through the eight lines. Also I need one 0V line.[I think it can be taken from the ground line and thatz why I didnt added a 9th line for the 0V]

Thank you again for your help..........