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The advantage of digital alarm clocks over analogue alarm clocks is that they require less power, the time can be set or reset easily and displays the time in digits. Design of a simple digital alarm clock is explained here. Using this digital alarm clock, time can be displayed in 24 HR format using an LED display and alarm can be set to a specific time. Alternatively, the digital alarm clock circuit can also be used to turn ON/OFF and electrical appliance after a specific time.