Real Time Clock
A Real Time Clock (RTC) is a hardware device or integrated circuit that keeps track of the current time and date, even when a computer or electronic system is powered off. It typically uses a low-power battery backup to maintain timekeeping functionality, providing accurate time data for scheduling, logging, and synchronization purposes in embedded systems, computers, and IoT devices.
Developers should learn about RTCs when working on embedded systems, IoT devices, or any application requiring persistent timekeeping without continuous power, such as data loggers, automation controllers, or consumer electronics. Understanding RTCs is crucial for implementing features like alarms, timestamps, and real-time scheduling in low-power environments, ensuring reliable operation across power cycles.