The design of a digital electronic clock can report time on time and has the function of timing. Clock function: use digital tube to display the accumulated time, 24 hours as the cycle. Timing function: it can quickly calibrate the functions of "hour", "minute" and "second". Timing function: it is specifically required to call 5 times of bass (500 Hz) before the whole point, another high tone (about 1000 Hz) at the whole point, 6 resonance calls, and the interval between two calls is 0.5 s. (optional) Timing accuracy: the timing error shall not exceed 10 s every day.

Filename	Size	Update
数字电子时钟.pdsprj	32634	2020-05-27

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