The design of electronic clock main functions are: 1. With time display and manual proofreading function, 24-hour clock 2 with year, month, date display and manual proofreading function 3 with alarm function 4 with snooze function 5 after power-down without the need to re-set the time and date 6 using AC and DC power supply. The main AC power, DC power supply for the backup auxiliary power, and can automatically switch

leddianzhendianzizhong.txt

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