Retro CMOS Clock (20 ICs)

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STD Retro CMOS Clock (20 ICs)

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License: GPL 3.0

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Update time： 2021-10-23 15:14:45

Creation time： 2020-11-25 01:46:12

Description

This clock wouldn't have been out of place in 1981. It is fairly typical of the kind of clocks that hobbyists were building. The circuit consists of a set of counters and LED segment drivers. There is a small amount of logic to divide down the value of the counters to hours, minutes and seconds. A couple of buttons allow you to adjust the hours and minutes to set the time. I have written an article about this project and uploaded it to the Hackaday website. Visit: [CMOS Clock Hackaday Project Page](https://hackaday.io/project/176063-hackaday-clock-a-day-entry-cmos-logic-clock)

Design Drawing

schematic diagram

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PCB

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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	7-SEG-SC56-11	LED3,LED1,LED4,LED6,LED5,LED7	7-SEG-SC56	6
2	CD4060BE	U2,U3	DIP-16_L20.0-W6.4-P2.54-LS7.6-BL	2
3	74HC04	U8,U18	DIL14	2
4	7V - 12V DC Power In	JP1	POWER_JACK_PTH	1
5	CD4026BE	U10,U5,U11,U13,U12,U16	DIP-16_L20.3-W10.2-P2.54-LS10.2-BL	6
6	74HC08	U6,U7,U14,U15,U17,U19,U20,U22	PDIP-14	8
7	330K Ohm	R1	R_AXIAL-0.3	1
8	220 Ohm	R16,R8,R17,R37,R24,R44	R_AXIAL-0.3	6
9	220	R15,R14,R13,R12,R11,R10,R2,R3,R4,R5,R6,R7,R23,R22,R21,R20,R19,R18,R31,R32,R33,R34,R35,R36,R25,R26,R27,R28,R29,R30,R38,R39,R40,R41,R42,R43	R_AXIAL-0.3	36
10	CD4093	U9	DIP14	1
11	Crystal 32,768 Hertz	U4	CRYSTAL 32768	1
12	0.1uF	C7,C8,C9,C2,C10,C12,C11,C15	RAD-0.1	8
13	100 uF	C1	CAP-D3.0×F1.5	1
14	74HC365	U21	74HC193	1
15	LED-5mm	LED11,LED10,LED9,LED8	LED-TH_BD5.0_RED	4
16	1K	R48,R47,R46,R45	R_AXIAL-0.3	4
17	10k	R49,R51	R_AXIAL-0.3	2
18	button668.5	MINUTES,HOURS	KEY-TH_4P-L6.0-W6.0-P4.50	2