Digital clocks
About the Digital clocks PCB
Digital clocks is an open source PCB design by alfpedraza, published on GitHub. It is a 2-layer board measuring 121.4 × 130.3 mm, with 114 components from 24 distinct parts.
Other key parts include the 74LS08, 74LS32, 74LS47, NFD-5011B and 74LS04. By type, the board carries 53 resistors, 27 ICs, 20 diodes, 7 capacitors, 4 switches and 2 connectors.
From the project
KiCad Electronics Projects
Main components on the Digital clocks
Digital clocks bill of materials (BOM)
114 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 74LS08 | DIP794W45P254L1969H508Q14 | U1, U2, U26 |
| 2 | 74LS32 | DIP794W45P254L1969H508Q14 | U3, U23 |
| 6 | 74LS47 | DIP792W45P254L1969H508Q16 | U4, U6, U11, U13, U18, U20 |
| 6 | NFD-5011B | 7SegmentLED_LTS6760_LTS6780 | U5, U7, U12, U14, U19, U21 |
| 1 | 74LS04 | DIP794W45P254L1969H508Q14 | U8 |
| 6 | 40193 | DIP792W45P254L1969H508Q16 | U9, U10, U15, U16, U17, U22 |
| 2 | CD4060BE | DIP794W45P254L1969H508Q16 | U24, U27 |
| 1 | 74HC14 | DIP794W45P254L1969H508Q14 | U25 |
| 1 | 32.768 kHz | Crystal_C38-LF_D3.0mm_L8.0mm_Horizontal | Y1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | USB_A | USB_A_Molex_67643_Horizontal | J2 |
| 3 | SW_Push | SW_PUSH_6mm_H5mm | SW1, SW2, SW3 |
| 1 | SW_SPDT | SW_500SSP1S2M2QEA | SW5 |
| 20 | 1N4148 | D_T-1_P5.08mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 +12 |
| 4 | 10u | CP_Radial_D5.0mm_P2.50mm | C1, C3, C4, C5 |
| 1 | 22pF | CP_Radial_Tantal_D6.0mm_P5.00mm | C2 |
| 1 | 22pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C6 |
| 1 | 0.1uF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C7 |
| 4 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R31, R47, R50 |
| 42 | 560 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3, R4, R5, R6, R7, R8, R9 +34 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16, R46, R48 |
| 1 | 10Meg | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R49 |
| 2 | 120k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R51, R52 |
| 1 | 330k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R57 |
Digital clocks design files
The KiCad project lives in the alfpedraza/electronics repository on GitHub; these links point at the commit this page was built from.
Digital clocks: common questions
How big is the Digital clocks PCB?
The Digital clocks measures 121.4 × 130.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Digital clocks?
114 components, from 24 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Digital clocks design files?
From the alfpedraza/electronics repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Digital clocks design in my own project?
The repository has no license, so all rights stay with alfpedraza. Use it as a reference, and ask the author before reusing the design.
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