Introduction - If you have any usage issues, please Google them yourself
The use of counters and prescaler design a real-time clock. Mold needs a total of 24 counters, 2 Die 6 counters, two-mode 10 counters, a generation of 1Hz the divider and six digital tube decoder. End-users HEX5 ~ HEX4 show hours (0 ~ 23), with HEX3 ~ HEX2 show minutes (0 ~ 59), with HEX1 ~ HEX0 showed seconds (0 ~ 59).