4 layers118.1 × 105.4 mm
PocketBeagleCommandStation SMD
RobertPHeller/CommandStationsAndBoosters
Command Stations and Boosters
172 parts
2 layers99.1 × 109.2 mm
PBCommandStation
RobertPHeller/CommandStationsAndBoostersCommand Stations and Boosters
- Size
- 99.1 × 109.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 42
- Pads
- 247
- Tracks, vias
- 366, 76
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 3
- Created
- 27 Dec 2022
- Updated
- 24 Oct 2026
Overview
PBCommandStation is an open-source printed circuit board by RobertPHeller, from the RobertPHeller/CommandStationsAndBoosters repository on GitHub. It is a 2-layer board of 99.1 × 109.2 mm with 54 parts on 42 nets, routed with 366 tracks and 76 vias.
It is built around the LMD18200T, SN75ALS174DW and LM393, with the RJ45, SB240-E3 and PN2222A among its other parts. Its parts include 15 resistors, 12 capacitors, 7 ICs, 4 connectors and 3 diodes.
Main components
7
LMD18200T
TO-220-11(Forming)-40℃~+125℃ 3A 660mΩ 9V~55V 9V~55V Bipolar Driver Yes TO-220-11(Forming) Stepper Motor Driver ROHSTexas InstrumentsStepper Motor Driver
SN75ALS174DW
SOIC-20-300mil0 4 Driver SOIC-20-300mil RS-485 / RS-422 ICs ROHSTexas InstrumentsRS-485 / RS-422 ICs
LM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparators
RJ45
TH-12PTH-12P SMT ROHSJLCPCB AssemblyUncategorisedSB240-E3
DO-204AC(DO-15)Schottky DiodesVishay Intertechnology
PN2222A
TO-92-3-55℃~+150℃ 1 NPN 1A 300MHz 300mV 40V 625mW NPN TO-92-3 Bipolar (BJT) ROHSNTE ElectronicsBipolar (BJT)
TIP120
TO-220-55℃~+150℃ 200uA 2V@3A,12mA 2W 5A 5V 60V NPN TO-220 Darlington Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Darlington Transistors
README
PocketBeagleCommandStation/README.mdPocketBeagleCommandStation
Through hole version of the PocketBeagle LCC/DCC Command Station. This is a DCC command station that is a LCC node. It implements the OpenLCB train protocol node over LCC and converts that to DCC commands. It includes a booster and puts the DCC signal on the LCC bus (pins 4 and 5). It implements a programming track and implements Railcom. The Command Station uses a PocketBeagle as the processing element and uses the PRUs (Programmable Realtime Units) to generate the DCC signal. (See PocketBeagleCommandStation_SMD for a SMD version.)
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | .01 uf | C1 | C401, C402, C403, C404 |
| 4 | 10K Ohms | R1 | R401, R403, R407, R411 |
| 4 | MountingHole_2-5mm_RevA_Date21Jun2010 | MountingHole_2-5mm_RevA_Date21Jun2010 | MH, MH, MH, MH |
| 3 | 1K Ohms | R1 | R101, R102, R405 |
| 2 | .1 uf | C1 | C101, C201 |
| 2 | 1.591K Ohms | R1 | R402, R404 |
| 2 | 10 nf | C1 | C405, C407 |
| 2 | 1M Ohms | R1 | R409, R410 |
| 2 | 60 Ohms | R1 | R201, R202 |
| 2 | LMD18200 | TO220_11PIN_VERT | U401, U403 |
| 2 | RJ45 | RJ45_8N-S | J201, J202 |
| 2 | SB240E | DO-41 | D201, D202 |
| 1 | + 15 in - | ScrewTerm2.54-2 | T201 |
| 1 | + 15 out - | ScrewTerm2.54-2 | T202 |
| 1 | + Power In - | mors_2p | T401 |
| 1 | 1 uf | C1 | C406 |
| 1 | 1000 nf | C1 | C408 |
| 1 | 13K Ohms | R1 | R408 |
| 1 | 15 uf 63V | C1V7 | C202 |
| 1 | 1n5349 | DO-41 | D401 |
| 1 | 33 Ohms 1W | R1 | R406 |
| 1 | 47 nf | C1 | C203 |
| 1 | DCC 1 | mors_2p | T402 |
| 1 | DCC 2 | mors_2p | T403 |
| 1 | Fan | pin_strip_2 | H401 |
| 1 | LM393 | DIP-8__300 | U404 |
| 1 | PN2222A | TO92 | Q101 |
| 1 | POCKETBEAGLE-P1 | pin_socket_18x2 | P1 |
| 1 | POCKETBEAGLE-P2 | pin_socket_18x2 | P2 |
| 1 | SN65HVD233-HT | DIP-8__300 | U202 |
| 1 | SN75ALS174 | DIP-16__300 | U101 |
| 1 | TCAN332DR | SOIC-8_N | U201 |
| 1 | TIP120 | TO220_VERT | Q401 |
| 1 | TMP36 | TO92PN | U402 |
| 1 | Termination | pin_socket_2x2 | JP201 |
Questions
How big is the PBCommandStation PCB?
It measures 99.1 × 109.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PBCommandStation use?
54 parts, built around the LMD18200T, SN75ALS174DW, LM393 and RJ45. 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 PBCommandStation KiCad files?
From the RobertPHeller/CommandStationsAndBoosters repository on GitHub, at the commit this page was made from: the board is PBCommandStation/PBCommandStation.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PBCommandStation design in my own project?
Its repository states no licence, so its author keeps all rights: ask RobertPHeller before reusing the design.
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