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The online stopwatch is a clock designed to measure the amount of time that passes between the moment of starting and stopping point.

Timer is usually designed to be run by pressing a button on the top and to stop pressing the button to show the elapsed time. Pressing the second button returns the stopwatch. The second button is also used to measure the transit time. When the button is pressed for a lap time while time passes, the display is frozen, but the clockwork continues to measure the total elapsed time. By pressing the button for the lap time clock continues to measure the total time.

Mechanical stopwatch starts springs, which must be periodically wind up turning on the top of the hour.

Electronic digital stopwatch, thanks to the online timer, are much more accurate than mechanical. Since they have a microchip, and usually have a pointer date and time of day. Some may also have connectors for external sensors countdown timer, which starts a stopwatch to external events and so much more tightly than the time that this can be achieved by pressing a finger on the button.

Stopwatch is used when it is necessary to accurately measure the time with the least hassle. Examples of its use in the laboratory experiments and sporting events.

Large digital version of a stopwatch that could be seen from a great distance, most commonly used in sports stadiums.

Stopwatch functions, as an additional feature, present in many digital watches and mobile phones. If you have an analog clock and a stopwatch function called chronograph.