PCB-earring---CAT-2.0
About the PCB-earring---CAT-2.0
PCB-earring---CAT-2.0 is an open source PCB design by AloneButt, published on GitHub. It is a 2-layer board measuring 26 × 28.4 mm, with 13 components from 8 distinct parts.
By type, the board carries 5 resistors, 2 transistors, 2 diodes, 2 capacitors, 1 battery holder and 1 switch.
From the project
Earring that flashes lights with bare PCB design
This project is a pair of kitty-shaped PCBs designed as earrings for my beloved wife 💖. Each earring is powered by a CR2032 coin cell and blinks two LEDs in an alternating pattern (classic astable multivibrator style 🟡🟢).
It’s a mix of electronics + wearable art, made as a gift 💝.
PCB-earring---CAT-2.0 bill of materials (BOM)
13 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 2N3904U | SOT-89-3 | Q1, Q2 |
| 1 | Battery_Cell | BATTERY holder CR2032 SMD | BT1 |
| 1 | SW_SPST | DIP switch 1P THT | SW1 |
| 2 | LED | LED_1206_3216Metric | D1, D2 |
| 2 | C_Polarized | C_0805_2012Metric | C1, C2 |
| 2 | 470R | R_0805_2012Metric | R1, R4 |
| 2 | 47KR 47kR | R_0805_2012Metric | R2, R3 |
| 1 | 0R (jumper) | R_0805_2012Metric | R6 |
PCB-earring---CAT-2.0 design files
The KiCad project lives in the AloneButt/PCB-earring---CAT-2.0 repository on GitHub; these links point at the commit this page was built from.
- LayoutEarring - Cat 2.0.kicad_pcb
- SchematicEarring - Cat 2.0.kicad_sch
- BOMproduction/bom.csv
PCB-earring---CAT-2.0: common questions
How big is the PCB-earring---CAT-2.0?
The PCB-earring---CAT-2.0 measures 26 × 28.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the PCB-earring---CAT-2.0?
13 components, from 8 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 PCB-earring---CAT-2.0 design files?
From the AloneButt/PCB-earring---CAT-2.0 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 PCB-earring---CAT-2.0 design in my own project?
The repository has no license, so all rights stay with AloneButt. Use it as a reference, and ask the author before reusing the design.