Is there a way to use iSight camera to control display based on motion?

I have a "weather" computer setup in my kitchen. It literally just has Doppler radar on at all times. I don't want the screen on all the time when I'm not in there for obvious reasons (burn, energy, etc.). I'd like the screen to sleep after say, an hour, and when I walk by have it come on. Any ideas how to accomplish this? Would be cool if the built in camera could somehow be used as a motion sensor.

I never tried it myself, but I was thinking that something like a home-made "USB motion detector" could be used to wake the display.
see > https://www.youtube.com/watch?v=H_3q-mO5djs
Additionally something like a simple home made "USB trip switch" would also work, because the computer will sense USB activity the same as a mouse click.
Good luck.
Dennis

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Is there a way to use iSight camera to control display based on motion?

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