2 layers116.8 × 30 mm
Type d
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
14 parts3kApache-2.0
2 layers45 × 52 mm
Traffic Light
Ali478qwe/Traffic-LightYou can watch the project in action here:
- Size
- 45 × 52 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 45
- Pads
- 64
- Tracks, vias
- 42, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Sep 2026
- Updated
- 16 Sep 2026
Overview
Traffic Light is an open-source printed circuit board by Ali478qwe, from the Ali478qwe/Traffic-Light repository on GitHub, published under the MIT licence. It is a 2-layer board of 45 × 52 mm with 14 parts on 45 nets, routed with 42 tracks and 0 vias.
Its parts include 6 resistors, 6 diodes and 2 connectors.
README
README.mdWhat is this project?
A miniature traffic light or a light show unit.
Project Photos
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 |  |  |
[!NOTE] Several light-show modes are also defined in the code but are currently commented out; simply uncomment them to enjoy the visual experience.
Project Video
You can watch the project in action here:
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6 |
| 6 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6 |
| 2 | Conn_01x20_Pin | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J1, J2 |
Questions
How big is the Traffic Light PCB?
It measures 45 × 52 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Traffic Light use?
14 parts. 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 Traffic Light KiCad files?
From the Ali478qwe/Traffic-Light repository on GitHub, at the commit this page was made from: the board is Traffic_light_pcb/Traffic_light.kicad_pcb and its schematic Traffic_light_pcb/Traffic_light.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Traffic Light design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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