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Updated: May 12

What is a real time clock (RTC)?

A real-time clock (RTC) is a type of clock device that keeps the real-time clock of a computer. These devices are most often used as a peripheral device that connects to computers. However, RTCs can also be used for other devices, for example digital cameras, cell phones and other mobile devices.

RTCs are usually powered by a small battery, so the clock remains accurate even when the computer loses power. RTCs can also be used as timers, for example to turn the computer on or off at a specific time.

How do RTC

s work?

RTCs use a crystal oscillator, which is usually placed on a chip. The crystal oscillator generates an electrical signal that produces a certain frequency. This signal is processed by other components to produce a real time clock.

RTCs are usually controlled using I2C or SPI, a serial communication protocol. The computer's operating system determines the actual time by reading the RTC and provides the time information to other applications.

What are the advantages of RTCs?

The key advantage of RTCs is that they require low power consumption to maintain accurate time. RTCs also provide a reliable and accurate time scale, thus providing a reliable source for time adjustment for computers and other devices.

How RTCs Work

RTCs use a crystal oscillator to keep a real-time time clock and date. The crystal oscillator allows electrical signals to be converted into a kind of vibrating motion. This vibration is counted by a counter and the time and date information is generated.

RTCs are powered by a battery and work even during power outages. The battery is used to maintain the RTC's settings and ensures that time and date information is not lost. Therefore, RTCs keep accurate time, especially in the e