Friday, January 15, 2010

How to turn the lights off when asleep!

My brother has a habit to sleep off while watching Television due to which he forgets to turn off the T.V and the lights.

In case of T.V. if you make it a habit at least using the sleep option you can set a timer so that the T.V. automatically turns off after sometime. But in case of lights how does one do that? There are light which turn on or off based on the movement in the region or based on sound(like a clap) or even turn off lights using T.V. remote()

Is there a mechanism through which one can detect when all the people in a room are asleep and accordingly turn off the lights? May be something related to thermal heat generated by body when we are asleep or anything at all.

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