Tuesday, February 19, 2013

What is a stopwatch clock

Stopwatch clocks - small stopwatch clock simplified device with weights- a variant of mechanical pendulum stopwatch clocks, anchor escapement and free weights as a motor. As the pendulum in some models use two "feet" moving in protivohod each other. Variation occurs with the battle (another chain with removable weights for combat, which can optionally be removed from the chain and hang next to a special hook - so-called "mode without a fight").

Cuckoo stopwatch clocks - wall stopwatch clocks in an elegant building, most mechanical watches (stopwatch clocks) to fight simulating singing cuckoo. Usually sounds (one to twelve) are heard every hour, counting the current time, and often interspersed gong ("Boom - Cuckoo"). Mechanism imitates a cuckoo, developed in the mid XVIII century, and since then has remained almost unchanged. Homeland cuckoo stopwatch clock is located in the heart of the Black Forest German town of Triberg, at least, that there is a museum of cuckoo stopwatch clocks.
Quartz stopwatch clock

Kind of electro-mechanical stopwatch clock. It is based on the piezoelectric effect, the property of quartz crystals, for example, deformed under the influence of an external electric field, and polarized by mechanical deformation. The crystal quartz, having a small size, can be a much more stable to generate fluctuations with high temporal and thermal stability. The mechanism consists of a quartz watch battery, electronic generator, counter divider and the output stage of the amplifier, which is loaded on the coil synchronous motor, which, through a system of gears drives the stopwatch clock.
Digital Watch
Main article: Digital stopwatch clock
The stopwatch clock on the PDA
Electronic stopwatch clocks
Desktop Alarm stopwatch clock
Modern digital stopwatch clock with calendar and thermometer

Watch, based in the oscillation periods of the master oscillator with electronic circuits and displays the information on a digital display.

The first digital watches were made in separate tubes and then transistors and microchips.

First wrist digital watch has an LED display, but they can tell the time is very short: too greedy proved LEDs. Then used the properties of liquid crystals oriented in the electric field and to transmit light from one polarization direction. When placed between two polarizers, the light from an external source does absorbing system polarizer, liquid crystal polarizer, reflector under electrical field becomes dark and forms a picture element. This has resulted in significantly reduced power consumption and replacement of batteries is much less common.

In modern digital stopwatch clock built in, usually a specialized microcontroller, and have had many hours of service functions (alarms, ringtones, calendars, etc.), but the microcontroller also continues to consider the oscillation periods of the same quartz crystal.
Note: There are also electronic stopwatch clock, based on the principle of counting periods Frequency, many countries have very strict requirements for frequency stability, but also the oscillation frequency of the network load can be varied, and the accuracy of these hours can not be considered normal, although for many people, it is sufficient.

Kind of electronic stopwatch clocks that display the time in binary code, called a "binary stopwatch clock" (English Binary watch). To display bits are commonly used LEDs. The number of groups of LEDs can be different, they may differ in size and location. Part of LEDs shows the hours, the other - minutes. LEDs may be responsible for counting seconds, date, etc.

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