Description: Digital tube first two shows a decimal number, range 00 to 59, the beginning of display 00, press S2 button once, incremented by 1 press S3 button once, the value minus 1 Each time you press S4 button. time, the value zero press the S5 key once, use the timer feature allows the value to start automatically every second plus 1 is pressed again the S5 key values stop plus 1, to maintain the original number is displayed.
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disp.c