Introduction - If you have any usage issues, please Google them yourself
Design an electronic clock with time, minutes and seconds, and time by 24 hours. Requirements:
(1) the time of digital clock is shown with six digital tubes, respectively, minutes and seconds;
(2) two control keys are used to divide and adjust the digital clock respectively.
(3) it has the function of imitating radio station. That means that at 59 minutes, 51 seconds, 53 seconds, 55 seconds and 57 seconds, a 4 500Hz bass is emitted. A 1kHz note is emitted at 59 minutes 59 seconds, and their duration is 1 second. The end of the last treble is exactly the moment of truth.
(4) it has a timer function and the longest alarm time is 1 minute. Ask to set the alarm clock at any time. The alarm signal is a square wave signal of 500Hz and 1kHz. The signals of both frequencies alternate and output for one second. Set a stop alarm button to stop the output alarm signal.
(5) the frequency of input clock pulse is 50MHz.