2 layers333.4 × 149.9 mm
2 layers41.9 × 40.3 mm
Star clip
ajkumar-1907/PCBs2Here are the PCBs that everyone want.
- Size
- 41.9 × 40.3 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 22
- Nets
- 11
- Pads
- 47
- Tracks, vias
- 66, 8
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Oct 2026
- Updated
- 10 Oct 2026
Overview
Star clip is an open-source printed circuit board by ajkumar-1907, from the ajkumar-1907/PCBs repository on GitHub. It is a 2-layer board of 41.9 × 40.3 mm with 22 parts on 11 nets, routed with 66 tracks and 8 vias.
It is built around the CR2032. Its parts include 7 resistors, 5 diodes, 4 capacitors and 1 IC.
Main components
1README
README.md🗂️ Projects
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✨ Cassiopeia Star HairclipA puffy star-shaped hair clip PCB. The Cassiopeia constellation's five LEDs twinkle, driven by a TLC555 timer and powered by a CR2032 coin cell.
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📐 Repo layout
Each project lives in its own folder:
<project>/
├── kicad/ KiCad project, schematic, PCB
├── fabrication/ Gerbers zip, drill files, BOM, pick-and-place
├── images/ 3D renders, layout, schematic
└── README.mdMore boards coming soon ⚡
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 470 | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5 |
| 5 | Yellow | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D4, D5 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C4 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 680k | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | CR2032 | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | OUT | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | THRES | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | TLC555CDR | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | VDD | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
Questions
How big is the Star clip PCB?
It measures 41.9 × 40.3 mm and has 2 copper layers, 1 mm thick.
What parts does the Star clip use?
22 parts, built around the CR2032. 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 Star clip KiCad files?
From the ajkumar-1907/PCBs repository on GitHub, at the commit this page was made from: the board is cassiopeia-star-hairclip/kicad/star_clip.kicad_pcb and its schematic cassiopeia-star-hairclip/kicad/star_clip.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Star clip design in my own project?
Its repository states no licence, so its author keeps all rights: ask ajkumar-1907 before reusing the design.
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