2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
2 layers101 × 62 mm
555clock
t-shoode/555clock- Size
- 101 × 62 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 27
- Pads
- 103
- Tracks, vias
- 263, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Dec 2025
- Updated
- 6 Dec 2025
Overview
555clock is an open-source printed circuit board by t-shoode, from the t-shoode/555clock repository on GitHub. It is a 2-layer board of 101 × 62 mm with 39 parts on 27 nets, routed with 263 tracks and 0 vias.
It is built around the NE555P. Its parts include 18 resistors, 6 transistors, 5 diodes, 4 capacitors and 3 switches.
Main components
1Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R5, R6, R9, R10, R11, R12, R14, R17, R18 |
| 6 | NPN | Package_TO_SOT_THT:TO-92 | Q1, Q2, Q3, Q4, Q5, Q6 |
| 5 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5 |
| 3 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 2 | 0.01u | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C2, C4 |
| 2 | 2k2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R15, R16 |
| 2 | 3.6k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R8, R13 |
| 2 | NE555P | Package_DIP:DIP-8_W7.62mm_Socket | U1, U2 |
| 1 | 0.1u | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C3 |
| 1 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 1M | Potentiometer_THT:Potentiometer_Runtron_RM-065_Vertical | R7 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
Questions
How big is the 555clock PCB?
It measures 101 × 62 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 555clock use?
39 parts, built around the NE555P. 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 555clock KiCad files?
From the t-shoode/555clock repository on GitHub, at the commit this page was made from: the board is 555clock.kicad_pcb and its schematic 555clock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 555clock design in my own project?
Its repository states no licence, so its author keeps all rights: ask t-shoode before reusing the design.
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