2 layers178 × 711 mm
4 layers70 × 34 mm
Clock module
Guscuto/pcb_clock_moduleClock Module PCB for 8 bit computer
- Size
- 70 × 34 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 41
- Nets
- 54
- Pads
- 165
- Tracks, vias
- 309, 59
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 May 2026
- Updated
- 31 May 2026
Overview
Clock module is an open-source printed circuit board by Guscuto, from the Guscuto/pcb_clock_module repository on GitHub. It is a 4-layer board of 70 × 34 mm with 41 parts on 54 nets, routed with 309 tracks and 59 vias.
It is built around the NE555DR, 74HC04D and 74HC08D, with the 74HC32D and USBLC6-2SC6 among its other parts. Its parts include 14 capacitors, 9 resistors, 7 ICs, 2 connectors and 2 switches. It belongs with the lEDs and displays boards of this library.
Main components
5
NE555DR
SOP-80℃~+70℃ 100kHz 4.5V~16V SOP-8 555 Timers / Counters ROHSUMWTimers / Counters
74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInverters74HC08D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV 2 27ns@4.5V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series AND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC32D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、4.4V、5.9V 100mV、400mV、400mV 2 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 6ns@6V,50pF 74HC Series OR Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
README
README.mdpcb_clock_module
Clock Module PCB for 8 bit computer
Parts
41| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10nF | PCM_JLCPCB:C_0603 | C5, C6, C7, C9, C12, C13 |
| 4 | 100nF | PCM_JLCPCB:C_0603 | C1, C10, C11, C14 |
| 4 | 1kΩ | PCM_JLCPCB:R_0603 | R4, R5, R8, R9 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 1uF | PCM_JLCPCB:C_0603 | C2, C3, C8 |
| 3 | NE555DR | PCM_JLCPCB:SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | U2, U3, U6 |
| 2 | 5.1kΩ | PCM_JLCPCB:R_0603 | R1, R2 |
| 1 | 1MΩ | PCM_JLCPCB:R_0603 | R3 |
| 1 | 200k | Potentiometer_SMD:Potentiometer_Bourns_3314G_Vertical | RV1 |
| 1 | 200kΩ | PCM_JLCPCB:R_0603 | R6 |
| 1 | 220Ω | PCM_JLCPCB:R_0603 | R7 |
| 1 | 4.7uF | PCM_JLCPCB:C_0603 | C4 |
| 1 | 74HC04D | PCM_JLCPCB:SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL | U7 |
| 1 | 74HC08D | PCM_JLCPCB:SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL | U4 |
| 1 | 74HC32D | PCM_JLCPCB:SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL | U5 |
| 1 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | Connector, USB-TYPE-C-16P | PCM_JLCPCB:TYPE-C-SMD_HX-TYPE-C-16PIN | J1 |
| 1 | SW_SPDT | Buttons_THT:SW_SPDT_L7.0mm_H16.0mm_W7.00mm | SW1 |
| 1 | Tactile Button, 160gf | PCM_JLCPCB:SW_TS-1088-AR02016 | S1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | Yellow | PCM_JLCPCB:D_0603 | D1 |
| 1 | ~ | PCM_JLCPCB:FB_0603 | FB1 |
Questions
How big is the Clock module PCB?
It measures 70 × 34 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Clock module use?
41 parts, built around the NE555DR, 74HC04D, 74HC08D and 74HC32D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Clock module KiCad files?
From the Guscuto/pcb_clock_module repository on GitHub, at the commit this page was made from: the board is clock_module/clock_module.kicad_pcb and its schematic clock_module/Main Circuit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Clock module design in my own project?
Its repository states no licence, so its author keeps all rights: ask Guscuto before reusing the design.
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