13-year-old boy invents doorbell that tricks burglars into thinking you're home:A schoolboy is on course for a £250,000 windfall after inventing a doorbell that fools burglars into believing somebody is home at an empty property.
Smart Bell, designed by 13-year-old Laurence Rook, dials the homeowner's mobile phone when pressed, allowing them to talk to whoever is outside their front door.
The device even produces a small amount of white noise to give any unexpected guest the impression they are speaking to someone inside the house on an intercom system.
From: The Daily Mail
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