2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
2 layers34.5 × 35.5 mm
555c2
ethandb74/555c2A LED chaser which blinks 10 LEDS in a variable speed sequence.
- Size
- 34.5 × 35.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 20
- Pads
- 61
- Tracks, vias
- 166, 15
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Mar 2026
- Updated
- 5 Jun 2026
Overview
555c2 is an open-source printed circuit board by ethandb74, from the ethandb74/555c2 repository on GitHub. It is a 2-layer board of 34.5 × 35.5 mm with 19 parts on 20 nets, routed with 166 tracks and 15 vias.
It is built around the NE555P. Its parts include 10 diodes, 2 capacitors, 2 resistors, 2 ICs and 2 connectors.
Main components
1README
README.md555c2
A LED chaser which blinks 10 LEDS in a variable speed sequence. This pcb has a space theme with the leds tracing out the Big Dipper, my personal favorite constilation. I also included some hand drawn PCB art. This Project was done to develop PCB and Schematic skills.
Below is an image of the front of my PCB.
Keep in mind this photo does not contain the connectors which were added after the photot was taken.
Below is my Schematic:
My PCB:
Soldering the Board
Product:
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | LED | LED_THT:LED_D5.0mm | D1, D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 1 | .01 | Capacitor_THT:C_Radial_D5.0mm_H5.0mm_P2.00mm | C2 |
| 1 | 1 | Capacitor_THT:C_Disc_D16.0mm_W5.0mm_P10.00mm | C1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 4017 | 555c2:N16 | U2 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 50k | Potentiometer_THT:Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV1 |
| 1 | Conn_01x02_Socket | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J2 |
| 1 | Conn__Socket | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U1 |
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Questions
How big is the 555c2 PCB?
It measures 34.5 × 35.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 555c2 use?
19 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 555c2 KiCad files?
From the ethandb74/555c2 repository on GitHub, at the commit this page was made from: the board is pcb/555c2.kicad_pcb and its schematic pcb/555c2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 555c2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask ethandb74 before reusing the design.