4000 Series CMOS Logic Clock
This clock counts and displays the time in binary and decimal using 4000 series chips it also has optional battery backup.
The binary count is done by six 4024 7bit binary counters and then the binary output is used by the six 4511 BCD to decimal seven segment display drivers to display the time in decimal the resets are done using two 4081 quad AND gates. The 1Hz clock pulse is generated by a 4060 14 Stage Ripple Carry Binary Counter/Divider and a 4027 dual J-K Flip Flop chip with a 32.768KHz watch crystal.
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