Introduction - If you have any usage issues, please Google them yourself
It should have a simple digital clock display- minutes- seconds function. We must first know the working mechanism of clocks, watches the entire work should be in the role of 1Hz signal is carried out so that each to a clock signal, second by 1 second, when the second jump 59 seconds to 00 seconds, minutes, 1-point increase while when the minutes 59 minutes to jump.