How to control an electric motor using LabVIEW?

Hi,
is there a simple way to control the rotation speed of a electric motor (12V) using LabVIEW?
I have an idea how to achieve this by using NI measurment card, by its not that cheap. Any ideas?
Maciek.
LabView 2009.
Solved!
Go to Solution.

Rubid wrote:
Let's complicate the problem. Is there a way to control the output voltage of the USB port in my PC?
Do you know what a USB-RS232 converter is??
Buy one together with that power supply and your problem is solved
What do you mean with "control the output voltage of the USB port" do you want to drive the motor directly from the USB port

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