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Sports timer design (1) in the four seven-segment LED digital display minutes and seconds, the longest time was 59:59 time. (2) Press the Clear button in the four seven-segment LED digital display time for 00:00. (3) Press the Start/Pause button, start or pause the timer clock. The timer function and the actual start/stop button to function the same. Design a display minutes and seconds timer. In four seven-segment LED digital tube display.