2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
2 layers58.6 × 62.4 mm
Cat LED
maraulsav/Cat-LED-ChaserA cat shaped LED Casher. Integrating flip flop mechanism to manage the flow of the light
- Size
- 58.6 × 62.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 46
- Nets
- 20
- Pads
- 66
- Tracks, vias
- 134, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Mar 2026
- Updated
- 5 Jul 2026
Overview
Cat LED is an open-source printed circuit board by maraulsav, from the maraulsav/Cat-LED-Chaser repository on GitHub. It is a 2-layer board of 58.6 × 62.4 mm with 46 parts on 20 nets, routed with 134 tracks and 0 vias.
It is built around the NE555P. Its parts include 10 diodes, 2 capacitors, 2 resistors, 2 ICs and 1 switch.
Main components
1README
README.mdCat-LED-Chaser
Hii! This is a cat shaped LED chaser. I wanted to make it as a keychain to be gifted to someone special for me during my highschool graduation later.. This is the final form of my cat LED casher
And here's the youtube video of my journey making this cat LED casher: https://www.youtube.com/watch?v=RgV0-7eemWM See full built documentation at JOURNAL (1).md
3D View
Front
Back
Features
- NE555P (555 Timer)
- CD4017 (Integrated Circuit)
- 10 LEDs
- 2 Capacitor
- 2 Resistor
- 1 Variable Resistor
- 1 Slide witch
- 1 Battery Socket
- 1 Battery
PCB
My PCB is made in KiCad These are the footprints I used
- Battery: Battery_Panasonic_CR2032-HFN_Horizontal_CircularHoles
- Capacitor_THT:CP_Radial D5.0mm_P2.00mm
- LED_THT:LED_D3.0mm
- Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal
- Variable Resistor: Potentiometer_THT: Potentiometer_Vishay_T93YA_Vertical
- SW SPST: Button_Switch_THT_SPST:SW_Push_1P2T_Vertical_E-Switch_800UDP8P1A1M6
- TestPoint: Connector PinSocket 2.54mm:PinSocket 1x01 P2.54mm Vertical
- NE555P: Package_DIP: DIP-8_W7.62mm
- 4017: footprints: N16
Here is my schematic:
and my PCB:
BOM
You can see the BOM in Blinky Board-bom.csv files
Additional Thingy
Thankyou for HackClub and KiCad for making this project possible
Parts
46| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | LOGO | Picture:Stars1 | G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G*** |
| 10 | LED | LED_THT:LED_D3.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 3 | LOGO | Picture:balll | G***, G***, G*** |
| 3 | TestPoint | Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical | 5V1, GND1, Out1 |
| 2 | LOGO | Picture:eyess | G***, G*** |
| 1 | 0.01 uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2 |
| 1 | 1 uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 4017 | footprints:N16 | U2 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 50k | Potentiometer_THT:Potentiometer_Vishay_T93YA_Vertical | RV1 |
| 1 | Battery_Cell | Battery:Battery_Panasonic_CR2032-HFN_Horizontal_CircularHoles | BT1 |
| 1 | LOGO | Picture:Nose | G*** |
| 1 | LOGO | Picture:starr | G*** |
| 1 | LOGO | Picture:CatAndStarFF | G*** |
| 1 | LOGO | Picture:wiskrr | G*** |
| 1 | LOGO | Picture:wiskl | G*** |
| 1 | MountingHole | MountingHole:MountingHole_4mm | H1 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | SW_SPST | Button_Switch_THT_SPST:SW_Push_1P2T_Vertical_E-Switch_800UDP8P1A1M6 | SW1 |
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Questions
How big is the Cat LED PCB?
It measures 58.6 × 62.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cat LED use?
46 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 Cat LED KiCad files?
From the maraulsav/Cat-LED-Chaser repository on GitHub, at the commit this page was made from: the board is Kicad/Cat LED .kicad_pcb and its schematic Kicad/Cat LED .kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cat LED design in my own project?
Its repository states no licence, so its author keeps all rights: ask maraulsav before reusing the design.