4 layers85 × 56 mm
4 layers14 × 44 mm
Traffic light
fabiobaltieri/traffic-light3- Size
- 14 × 44 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 45
- Pads
- 153
- Tracks, vias
- 238, 116
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Aug 2025
- Updated
- 21 Oct 2026
Overview
Traffic light is an open-source printed circuit board by fabiobaltieri, from the fabiobaltieri/traffic-light repository on GitHub. It is a 4-layer board of 14 × 44 mm with 45 parts on 45 nets, routed with 238 tracks and 116 vias.
It is built around the ESP32-C3F, BSS138 and 2450AT18D0100001E. Its parts include 17 capacitors, 11 resistors, 3 diodes, 3 transistors and 2 ICs. It belongs with the ESP32 and RISC-V boards of this library.
Main components
3Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | balto:C_0402_Worthington | C4, C17, C18, C19 |
| 3 | 10k | balto:R_0402_Worthington | R4, R5, R6 |
| 3 | 1u | balto:C_0402_Worthington | C1, C3, C13 |
| 3 | 220 | balto:R_0402_Worthington | R8, R13, R17 |
| 3 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 3 | LED | balto:Wurth_LED_2214 | D2, D5, D9 |
| 2 | 1.5p | balto:C_0402_Worthington | C10, C11 |
| 2 | 10u | balto:C_0402_Worthington | C2, C5 |
| 2 | 12p | balto:C_0402_Worthington | C7, C9 |
| 2 | 15p | balto:C_0402_Worthington | C6, C8 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 5.1k | balto:R_0402_Worthington | R9, R10 |
| 2 | Fiducial | Fiducial:Fiducial_0.75mm_Mask1.5mm | FID1, FID2 |
| 2 | TBD | balto:C_0402_Worthington | C12, C22 |
| 1 | 0 | balto:R_0402_Worthington | R7 |
| 1 | 2450AT18D0100001 | balto:2450AT18D0100001-R | AE1 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | Y3 |
| 1 | 3n | balto:L_0402_Worthington | L1 |
| 1 | 40MHz | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y2 |
| 1 | ESP32C3 | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.7x3.7mm | U1 |
| 1 | LOGO | balto:paw | G*** |
| 1 | TBD | balto:L_0402_Worthington | L3 |
| 1 | TPS7A0333DBVR | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_JAE_DX07S016JA1R1500 | J7 |
Questions
How big is the Traffic light PCB?
It measures 14 × 44 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Traffic light use?
45 parts, built around the ESP32-C3F, BSS138 and 2450AT18D0100001E. 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 fabiobaltieri/traffic-light repository on GitHub, at the commit this page was made from: the board is hardware/traffic-light.kicad_pcb and its schematic hardware/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 states no licence, so its author keeps all rights: ask fabiobaltieri before reusing the design.
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