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In the mid 1960s, Sony introduced the first Dream Machine. The basic idea was to use a radio program to wake up users more pleasantly, as many people found the loud mechanical alarm made by traditional alarm clocks disturbing. The use of direct-read digital display as opposed to a traditional clock dial gave the design a modernistic feel, which ...
Some models offer dual alarm for awakening at different times and "snooze", usually a large button on the top that silences the alarm and sets it to resume sounding a few minutes later. [19] Some clock radios also have a "sleep" timer, which turns the radio on for a set amount of time (usually around one hour).
A travel clock, travel alarm clock and in some cases pouch alarm clock, is an alarm clock whose primary characteristic is that it must have a size, design, and weight that make it easily transportable during a trip, so it is usually contained in a box or case. In the case of an alarm clock, the box must let the acoustic signal pass through to ...
They also developed the world's first radio-controlled atomic alarm clock with an analogue alarm setting. In 1996, a new radio-controlled movement was developed: the smallest dual-motor, radio-controlled movement with the fastest setting system. This movement corrects to the right time within five minutes. [8]
Quartz clock. Circuit board of an e block from a chronograph -wristwatch. Quartz oscillator crystal on right. Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at ...
Radio clock. A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [ 1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
Digital clock. Basic digital alarm clock without a radio. The mark in the top-left of the display indicates that the time is 4:00pm (16:00), not 4:00am. A digital clock displays the time digitally (i.e. in numerals or other symbols), as opposed to an analogue clock . Digital clocks are often associated with electronic drives, but the "digital ...
Security alarm. A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary ( theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and ...
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