2 layers50 × 65 mm
Leds hub
Prevole/alpenhof
A model railway lighting project featuring individually controlled LED lighting for buildings and scenery.
21 parts
2 layers84 × 60 mm
Leds controller
Prevole/alpenhofA model railway lighting project featuring individually controlled LED lighting for buildings and scenery.
- Size
- 84 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 62
- Pads
- 154
- Tracks, vias
- 229, 2
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 28 Oct 2026
- Updated
- 6 Nov 2026
Overview
Leds controller is an open-source printed circuit board by Prevole, from the Prevole/alpenhof repository on GitHub. It is a 2-layer board of 84 × 60 mm with 7 parts on 62 nets, routed with 229 tracks and 2 vias.
It is built around the ULN2803A. Its parts include 4 connectors and 2 ICs. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdMaquette Alpenhof
A model railway lighting project featuring individually controlled LED lighting for buildings and scenery.
Architecture
- Controller: Raspberry Pi Pico 2 WH generates control signals.
- LED Drivers: ULN2803A ICs switch each LED independently on the ground side.
- LED Hub: Custom KiCad PCB distributes power and connects up to 16 LEDs via JST-XH connectors.
- Power: External 15V DC supply powers the LEDs independently of the Pico.
- Interconnection: A 20-pin IDC ribbon cable carries 16 individual LED channels and four shared +15V connections between the controller and hub.
The Pico controls the drivers; it does not supply power directly to the LEDs. All circuits share a common ground.
Status
Work in progress.
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | ULN2803A | Package_DIP:DIP-18_W7.62mm_Socket | U1, U2 |
| 1 | Conn_01x02 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J4 |
| 1 | Conn_02x06_Odd_Even | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | J3 |
| 1 | Conn_02x10_Odd_Even | Connector_IDC:IDC-Header_2x10_P2.54mm_Vertical | J1 |
| 1 | RaspberryPi_Pico_W | Module:RaspberryPi_Pico_Common_Unspecified | A1 |
| 1 | XL6009_MODULE | Alpenhof:XL6009_Module_Socket | J2 |
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Questions
How big is the Leds controller PCB?
It measures 84 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Leds controller use?
7 parts, built around the ULN2803A. 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 Leds controller KiCad files?
From the Prevole/alpenhof repository on GitHub, at the commit this page was made from: the board is hardware/controller/leds_controller/leds_controller.kicad_pcb and its schematic hardware/controller/leds_controller/leds_controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Leds controller design in my own project?
Its repository states no licence, so its author keeps all rights: ask Prevole before reusing the design.