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It has been suggested that this article or section be merged into Electronic clock. (Discussion). Once you have completed the merger of articles, calls for the merging of records in WP: TAB / F. A digital clock is a type of clock that bases its operation on digital electronics for marking time. The invention, in 1956, digital clock was a big revolution in the watch because it managed to produce watches much cheaper and accurate than mechanical performance. To represent the time, many digital clocks use the seven-segment LED, VFD or LCD, to form each of the numbers. These clocks also include other elements, to indicate whether the time is morning or afternoon AM PM, and when activated the alarm and what time is scheduled. Digital watches are very small, useful and cheap. For these reasons have been incorporated into most electronic equipment. Many digital watches and clocks are used where they are incorporated into a radio. The main break with the mechanical clock is the elimination of all the mechanisms that had been inside the box of watches and were replaced by electronic circuitry powered by a small battery and which facilitated the direct reading of time. Due to the cheap digital watches that are already imposed in many applications, and so most are now digital clocks, watches that are in household appliances, computers, cell phones, cars, etc.. Also, many of the watches that are used are digital while in the field of wristwatches were imposed by the analog quartz electronic watches. An electronic clock is a clock where the time base is electronic or electromechanical and frequency division, too. The accuracy of the clock depends on the time base, which may consist of an oscillator or an adapter that as a reference, generates a periodic signal. The frequency divider is a digital circuit consisting of a series of counters to obtain a frequency of 1 Hz, which allows you to display seconds. If you want to show tenths, the division is halted when the 10 Hz This often goes to the presentation module, which can be electronic or mechanical, where others are dividers separating the seconds, minutes and hours to be presented by some sort of display . The type of time base used is so important that often name the type of clock. The most common are:. Network pattern. It has used as a reference oscillator and 50 Hz (or 60 Hz) of the network. It is the simplest, but is fairly accurate over the medium term as the frequency changes are compensated network throughout the day. It has two major drawbacks:. Need a "clean" signal for which is usually filtered before applying to the counters. You need the network, which does not allow laptop use and also compared to a power outage, you lose time. There are models that include an oscillator and batteries, so that the oscillator and counters are still operating in the cut, so no time is lost. Play pattern. The time base has to be some kind of PLL, coupled with any of the companies time. They put in hours alone and change to winter time or summer autonomously. The drawback is that you need the time signal, so that even at "dark" does not present major advantages.Pitch clock. The oscillator is controlled by a tuning fork inserted in the feedback loop. It has already fallen into disuse, but at the time were high-end, and Bulova, for example, pitch available wrist watches. Quartz clock. Fingerboard replaced by a quartz oscillator, usually at 32 768 Hz, to be exact power of two, which simplifies the crossover. For its stability and economy has displaced all other types of clock in typical applications. Atomic clock (Ammonia, cesium, etc.) is to include in the feedback loop a cavity with suitable molecules of the substance, so as to excite the resonance of one of its atoms. The digital clock was invented in 1956 by the Bulgarian Petar Ptrov engineer, and became popular when the LED chips and began to be cheap. By 1970, digital watches were mechanically operated with a small AC motor is used as part of the mechanism to change the time. Hamilton Pulsar introduced in 1972, the first LCD digital watch market. This page was last modified on 25 March 2010, at 13:20. Text is available under the Creative Commons Attribution ShareAlike 3.0, additional terms may apply. See Terms of Use for more information. ..Copyright © 2009