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Real-Time Clock (RTC)

maker

A Real-Time Clock (RTC) is a computer clock that keeps track of the current time and date, integral to maintaining time during system power-off.

expanded

An RTC maintains accurate timekeeping by using a low-power timekeeper IC, which is essential for systems that require constant time tracking, such as logging events or time-stamping data. It is crucial in microcontrollers and embedded systems that need to record time even when the primary power supply is cycled off.

examples

The DS3231 RTC module offers precise timekeeping with an accuracy of ±2 ppm from 0°C to +40°C.

Commonly used in dataloggers for time-stamping sensor data to track environmental changes.

The PCF8523 RTC IC integrates into a Raspberry Pi for maintaining time during reboots and when disconnected from the internet.

Utilized in hobbyist and educational projects to ensure accurate time display and logging.

related terms

Serial Clock (SCK)
A serial clock (SCK) is a timing signal used to synchronize communication between devices in a serial communication interface.
Raspberry Pi
A compact, single-board computer developed by the Raspberry Pi Foundation.
Regulator
A regulator is a device designed to maintain a constant output of a specified parameter despite variations in external conditions.
Microcontroller Unit (MCU)
A microcontroller unit (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system.
Resistor
A resistor is a passive electrical component that implements electrical resistance as a circuit element.