thinker wrote:Лучше приведите ссылку, где подтверждаются ВАШИ доводы. Если они у Вас вообще есть.
Такого уровня, как Ваша? Да сколько угодно, навскидку http://www.answers.com/topic/digital-clocks :
To reduce the problem, later designs often incorporate a battery backup to maintain the time during power outages. More recently, some devices incorporate a method for automatically setting the time, such as using a broadcast radio time signal from an atomic clock or getting the time from an existing satellite television or computer connection.
Вот насчет точности http://electronics.howstuffworks.com/digital-clock2.htm
The signal can be generated using a crystal oscillator. Obviously, any battery-operated clock or wristwatch will use this technique instead. It takes more parts, but is generally much more accurate.
