Signal
About the Signal PCB
Signal is an open source PCB design by slonket, published on GitHub under the MIT license. It is a 2-layer board measuring 12.4 × 28.4 mm, with 9 components from 5 distinct parts.
By type, the board carries 5 diodes and 4 resistors.
From the project
An assortment of projects to supplement the Lego 12V "Gray" era trains.
The majority of 12V gray-era sets are inspired by the Deutsche Bundesbahn (DB); even the turnouts feature a "lantern" brick akin to those on German turnouts. The 12V signal brick (70022), however, does not hold a connection to a real German counterpart. This project reimagines the Lego signal head as two different German Hp signals ("home" and "entry") while maintaining the original's blocky charm.
Signal bill of materials (BOM)
9 components, 5 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | SM4007PL 1N4148 | D_SOD-123F | D1, D5 |
| 1 | GREEN | D_LED_5mm | D2 |
| 1 | RED | D_LED_5mm | D3 |
| 1 | YELLOW | D_LED_5mm | D4 |
| 4 | 270 | R_1206 | R1, R2, R3, R4 |
Signal design files
The KiCad project lives in the slonket/lego-12v repository on GitHub; these links point at the commit this page was built from.
Signal: common questions
How big is the Signal PCB?
The Signal measures 12.4 × 28.4 mm, has 2 copper layers and is 1 mm thick.
How many components are on the Signal?
9 components, from 5 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Signal design files?
From the slonket/lego-12v repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Signal design in my own project?
Yes, under the terms of its MIT license, which slonket chose for the repository.
