I have a project to create a stopwatch using some cmos ic. i use cd4060 and cd4027 as my 1 hertz clock and using 4 cd4026 as my counter and decoder to my 7 segment display. My circuit supposed to have 99 minute count maximum. But in my case now after it reaching 9 minute 59 second, they all back to zero. Can someone tell me what is wrong with my circuit?
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