2 layers110 × 220 mm
Fin ltm
HekiNav/finland-live-train-map
Some of the LEDs are missing because they were removed after making the initial layout
423 parts7MIT
2 layers249 × 69.5 mm
Helsinki LED Train Map
CDFER/helsinki-live-train-mapA physical, real-time LED map of the Auckland train network, powered by an ESP32-C3 microcontroller. Train movements are displayed using addressable RGB LEDs, with live data fetched over Wi-Fi.
- Size
- 249 × 69.5 mm
- Copper layers
- 2
- Thickness
- 0.92 mm
- Parts
- 441
- Nets
- 361
- Pads
- 1,560
- Tracks, vias
- 3,534, 841
- Pours
- 341
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Jul 2025
- Updated
- 7 Jul 2025
Overview
Helsinki LED Train Map is an open-source printed circuit board by CDFER, from the CDFER/helsinki-live-train-map repository on GitHub, published under the MIT licence. It is a 2-layer board of 249 × 69.5 mm with 441 parts on 361 nets, routed with 3,534 tracks and 841 vias.
It is built around the ESP32-C3FH4, SN74LVC4245APWRE4 and XC6206P332MR, with the WS2812B, MM1W5V6 and SS54 among its other parts. Its parts include 303 diodes, 70 capacitors, 26 resistors, 5 ICs and 3 switches. It belongs with the ESP32 and RISC-V boards of this library.
Main components
10
ESP32-C3FH4
QFN-32-EP(5x5)160MHz 32 Bit 3V~3.6V 400KB RISC-V Watchdog reset、Software reset、Built-in general-purpose timer、Programmable watchdog、Built-in temperature sensor、True random number generator (TRNG)、Storage encryption、Infrared remote control QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)
SN74LVC4245APWRE4
TSSOP-24-40℃~+85℃ 2.7V~3.6V 4.5V~5.5V 8 Bidirectional Level translator Output enable high-impedance Tri-State TSSOP-24 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
XC6206P332MR
SOT-23-40℃~+85℃@(Ta) 1 1uA 200mA 3.3V 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
MM1W5V6
SOD-123Zener Diodeshongjiacheng
SS54
SMA(DO-214AC)-55℃~+125℃ 1mA@40V 40V 550mV@5A 5A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
H3V3U10B
DFN1006-2L-55℃~+125℃ 0.3pF 125W@8/20us 200nA 25V 3.3V 5A@8/20us 6V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 DFN1006-2L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)HL3415A
SOT-23MOSFETshongjiachengMMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)MMSZ5227B
SOD-123Zener Diodeshongjiacheng
README
README.mdAuckland Live LED Train Map
A physical, real-time LED map of the Auckland train network, powered by an ESP32-C3 microcontroller. Train movements are displayed using addressable RGB LEDs, with live data fetched over Wi-Fi.
Table of Contents
Features
- Real-time Train Tracking: Displays the approximate locations of trains on the Auckland network.
- Addressable LEDs: ~150 WS2812B-compatible RGB LEDs (1.6x1.5mm) for a vibrant display.
- Wi-Fi Connectivity: ESP32-C3's built-in Wi-Fi fetches live train data.
- Custom PCB: Designed for JLCPCB manufacturing limits.
- Open Source: Hardware and firmware are open source.
Hardware
- Microcontroller: ESP32-C3 (RISC-V, 160 MHz, 4 MB Flash, QFN32)
- LEDs: ~150 x XL-1615RGBC-WS2812B (1.6mm x 1.5mm)
- PCB: 249mm x 66mm, JLCPCB-friendly
- Antenna: On-board PCB antenna (TI CC2430DB design)
PCB Design
- Designed in KiCad V9.0 using JLCPCB KiCad Library
- View Online: Interactive PCB Layout (Kicanvas)
- Source Files:
/PCBdirectory
Software / Firmware
The ESP32-C3 firmware is responsible for:
- Connecting to Wi-Fi
- Fetching live train data from the GTFS Realtime Cache API
- Processing data to determine train locations
- Controlling WS2812B LEDs to display train positions
Getting Started
- Flash the Firmware:
- Use the Web Installer (recommended, no drivers needed)
- Or flash manually using PlatformIO (
Firmware/directory)
- Connect to Wi-Fi:
- On first boot, use the web interface to configure Wi-Fi credentials.
- Power the Board:
- Use a 5V USB-C power supply capable of at least 1A.
- Enjoy the Live Map!
Web Installer
Easily flash the latest firmware to your ESP32-C3 using your browser:
Open the Auckland LED Train Map Web Installer
- Works with Chrome, Edge, or any Web Serial-compatible browser
- Follow on-screen instructions to connect and flash your device
Links
Contributing
Contributions are welcome! Open an issue or submit a pull request for improvements, bug fixes, or feature suggestions.
License
This project is released under the MIT license.
© 2025 Chris Dirks
Parts
441| Qty | Value | Footprint | References |
|---|---|---|---|
| 291 | WS2812B | PCM_JLCPCB:LED-SMD_4P-L1.6-W1.5_XL-1615RGBC-WS2812B | D2001, D2002, D2003, D2004, D2005, D2006, D2007, D2008, D2009, D2010, D2011, D2012, D2013, D2014, D2015, D2016 +275 |
| 28 | 220nF | PCM_JLCPCB:C_0402 | C2002, C2003, C2005, C2006, C2008, C2009, C3002, C3003, C3005, C3006, C4002, C4003, C4005, C4006, C4008, C4009 +12 |
| 18 | 10uF | PCM_JLCPCB:C_0402 | C1004, C1006, C1007, C1014, C2001, C2004, C2007, C3001, C3004, C4001, C4004, C4007, C5001, C5004, C5007, C6001 +2 |
| 10 | 100nF | PCM_JLCPCB:C_0402 | C1002, C1003, C1008, C1010, C1011, C1015, C1016, C1020, C1023, C1024 |
| 7 | 100kΩ | PCM_JLCPCB:R_0402 | R1007, R1014, R1019, R1023, R1024, R1025, R1026 |
| 6 | LOGO | LOGO | G***, G***, G***, G***, G***, G*** |
| 4 | 0Ω | PCM_JLCPCB:R_0402 | R1008, R1009, R1010, R1016 |
| 4 | 10kΩ | PCM_JLCPCB:R_0402 | R1004, R1005, R1006, R1017 |
| 4 | 1uF | PCM_JLCPCB:C_0402 | C1009, C1013, C1019, C1026 |
| 4 | 5.1kΩ | PCM_JLCPCB:R_0402 | R1002, R1003, R1012, R1013 |
| 4 | ~ | PCM_JLCPCB:Hole_Tooling_JLCPCB | H1001, H1001, H1002, H1003 |
| 3 | 15kΩ | PCM_JLCPCB:R_0402 | R1001, R1020, R1021 |
| 3 | Green | PCM_JLCPCB:D_0805 | D1009, D1010, D1011 |
| 3 | LOGO | Custom_Footprints:Power | G***, G***, G*** |
| 3 | Red | PCM_JLCPCB:D_0805 | D1002, D1007, D1008 |
| 3 | Tactile Button, 160gf | PCM_JLCPCB:SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL-2 | S1001, S1002, S1003 |
| 2 | 1.5pF | PCM_JLCPCB:C_0402 | C1027, C1028 |
| 2 | 100uF | PCM_JLCPCB:C_CASE-B-3528-21(mm) | C1005, C1025 |
| 2 | 100Ω | PCM_JLCPCB:R_0402 | R1018, R1022 |
| 2 | 2.7nH | PCM_JLCPCB:L_0402 | L1001, L1003 |
| 2 | 27pF | PCM_JLCPCB:C_0402 | C1021, C1022 |
| 2 | C_Small | PCM_JLCPCB:C_0402 | C1017, C1018 |
| 2 | Connector, USB-TYPE-C-16P | PCM_JLCPCB:TYPE-C-SMD_HX-TYPE-C-16PIN | U1002, U1004 |
| 2 | MM1W5V6 | PCM_JLCPCB:D_SOD-123 | D1003, D1006 |
| 2 | SS54 | PCM_JLCPCB:D_SMA | D1001, D1005 |
| 1 | 10nF | PCM_JLCPCB:C_0402 | C1012 |
| 1 | 10uF | PCM_JLCPCB:C_CASE-A-3216-18(mm) | C1001 |
| 1 | 15nH,300mA | PCM_JLCPCB:L_0402 | L1002 |
| 1 | 1kΩ | PCM_JLCPCB:R_0402 | R1015 |
| 1 | 3.3V | Custom_Footprints:TestPoint_Pad_D1.0mm | TP1005 |
| 1 | 40MHz, 15pF | Custom_Footprints:OSC-SMD_4P-L3.2-W2.5-BL_SIT8008BI | X1001 |
| 1 | 510Ω | PCM_JLCPCB:R_0402 | R1011 |
| 1 | Antenna_Shield | Custom_Footprints:Inverted_F_Antenna_2.4Ghz_1.0mmPCB_TI_CC2430DB.pretty | AE1001 |
| 1 | ESP32-C3FH4 | Custom_Footprints:QFN-32-1EP_5x5mm_P0.5mm_EP3.7x3.7mm_ThermalVias | U1003 |
| 1 | H3V3U10B | PCM_JLCPCB:D_DFN1006-2L | D1012 |
| 1 | HKI-KTS_MCU | Custom_Footprints:TestPoint_Pad_D1.0mm | TP1002 |
| 1 | HL3415A | PCM_JLCPCB:Q_SOT-23 | Q1001 |
| 1 | HPL-NOA_MCU | Custom_Footprints:TestPoint_Pad_D1.0mm | TP1003 |
| 1 | LOGO | Custom_Footprints:Brightness_7 | G*** |
| 1 | LOGO | Custom_Footprints:Brightness_0 | G*** |
| 1 | LOGO | Custom_Footprints:WiFi | G*** |
| 1 | LOGO | Custom_Footprints:Mode_Off_ON | G*** |
| 1 | LVL-Shifter-EN | Custom_Footprints:TestPoint_Pad_D1.0mm | TP1001 |
| 1 | MMBT3904 | PCM_JLCPCB:Q_SOT-23 | Q1002 |
| 1 | MMSZ5227B | PCM_JLCPCB:D_SOD-123 | D1004 |
| 1 | NAL-NIMT_LED | Custom_Footprints:TestPoint_Pad_D1.0mm | TP1006 |
| 1 | Polyfuse, 2A | Fuse:Fuse_1206_3216Metric | F1001 |
| 1 | Prog Connector | Custom_Footprints:Prog Connector | J1001 |
| 1 | SN74LVC4245APWR | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U1005 |
| 1 | STRAND-MNK_LED | Custom_Footprints:TestPoint_Pad_D1.0mm | TP1004 |
| 1 | XC6206P332MR | PCM_JLCPCB:SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | U1001 |
| 1 | ~ | PCM_JLCPCB:FB_0603 | FB1001 |
| 1 | ~ | PCM_JLCPCB:Part_Num_JLCPCB | PN1001 |
Questions
How big is the Helsinki LED Train Map PCB?
It measures 249 × 69.5 mm and has 2 copper layers, 0.92 mm thick.
What parts does the Helsinki LED Train Map use?
441 parts, built around the ESP32-C3FH4, SN74LVC4245APWRE4, XC6206P332MR and WS2812B. 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 Helsinki LED Train Map KiCad files?
From the CDFER/helsinki-live-train-map repository on GitHub, at the commit this page was made from: the board is PCB/Helsinki-LED-Train-Map.kicad_pcb and its schematic PCB/HKI-KTS-1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Helsinki LED Train Map 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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