(1) can achieve the basic clock function, decimal display hours, minutes and seconds bit.(2) adjustable, can be preset time.(3) timing, timing time arrival prompted (tips for voice or image can be ).(4) the clock12 hours and 24 hours for adjustable free conversion between.(5) to achieve stopwatch function of time

电子设计大赛原理图.pdf
带有数字温度计与计算器的数字钟.pdf

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