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National Instruments has put out live remote experiments available any time, any place, and are completely free. Using the new remote panels browser add-in in LabVIEW 6.1, you can control one of these experiments with just your Web browser.

An example is:

Temperature Control Experiment -- This experiment uses a light bulb and thermistor to demonstrate control principals. You can manipulate parameters (P, PI, PID) to create a temperature control system or control the temperature manually. The experiment also contains a live video feed of the light bulb and experimental setup. Estimated completion time -- 10 min.

Here's the link:

http://www.ni.com/academic/live_experiments.htm

Have fun!