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How to Trigger Anything from Anywhere with Just a Phone Call

Mad Science: Smartphones are crazy awesome. You can do your banking, track your children, find directions, and even pretend to have a mustache. The only thing that these personal supercomputers are missing is physical interaction with the environment.

I wanted to be able to call my house and turn on the lights and television during nights when I was away on vacation. What's more, I didn't want to spend any money on cell phone bills and wanted to be able to use virtually any phone. I came up with a light-activated cell phone switch box that uses the display screen that you get from an incoming call to control a physical output.

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