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Dear all,
Now I found the problem, now it is working as usual, I did in reset pin number 9 of AT89C52 just touch a wire with 5 volt positive 3 - 4 times now it is work as 12hrs format, after (0) 9 : 5 9 it is going to 1 0 : 0 0 and as usual, I mean the 4th digit of 10hrs digit is working, I...
Thanks,
Yes, earlier it was worked correct 12hrs format that is after (0)9 : 5 9 it ran to 1 0 : 0 0 but some unknown reason now it is going after (0)9 : 5 9 to (0) 0 : 0 0, I mean the forth digit of 10hrs digit (showed inside the brackets) that is not light up, only three digits are working.
My name is Rajagopal 70 years old, I knows basic electronics but no experience in current programming.
I have purchased a few 7 segment 4 digit pcbs with AT89C52, RTC DS1307, 74LS595 (4nos), and ULN 2003 (4nos) 12hrs format and program preloaded assembled clock PCBs.
I did 12” ...
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