Alarm Clocks: What Are They?

The alarm clock is a specific clock, designed to awaken a person at a predetermined time. The main function of an alarm clock is to awaken people from sleep, as well as short naps, and can also be utilized as a reminder device. While many alarm clocks utilize sound as a means to achieve disruption, others can use lights. Other—newer—alarm clocks can be rigged to roll around the room, or even fly above the sleeper’s body, in order to make the sleeper engage physical activity that will awaken them. Other, newer, alarm clocks use sensors to determine a person’s sleep schedule, and will avoid waking them during a deeper sleep cycle. By awakening an individual during a light sleep stage, they will wake up more refreshed, and less groggy.
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How Projection Alarm Clocks Work

It's a little bit like stepping into the future, when you awaken to a projection alarm clock. The time dances magically on the bedroom wall, and the foot tall writing is easy to read.
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How the Atomic Clock Works

It is a common misconception that atomic clocks work from the same principles as the atomic bomb. This is not so, but it is an easily made mistake, because an atomic clock is a massive contraption that looks like it might be used as a weapon by some mad scientist. Atomic clocks are called such, because they have a terrifying accuracy that is achieved based on measurements of slight changes in the electrons that orbit the nucleus of an atom.
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A Timely Gift for New Graduates

New high school grads may think they are through with getting up for school... wrong. Here comes first day of college classes -- and now they have to be on time without Mom's help in the morning! That's why the Neverlate Alarm Clock makes a great graduation gift.
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