By Nick Farrell
Here is news of an alarm clock which works out when it is best to wake you up. Notice it doesnâ€™t tell you when you need to wake up; instead it reads your brainwaves and work out when is the best time for you. The gadget, SleepSmart, works on the principle that you have a regular sleep pattern of 90 minutes going from lighter to deeper states. A prototype has been finished by the students at Brown University, Rhode Island, who have formed a company to promote their invention. It is not clear when it will be in the shops.
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