LocoMotive DCC for Android

Project summary

LocoMotive DCC is a budget-friendly Bluetooth command station created by Bill Cuthbert. The system uses a compact Arduino-based receiver (commonly an Arduino Pro Mini) paired with an HC-06 Bluetooth module and an LMD18200 H-bridge motor driver capable of about 2 A. A smartphone app assembles DCC packets and sends them over Bluetooth to the Arduino, producing a usable command station from only a few components. When parts are sourced from places like eBay, the total cost is typically around £20.

Electronics and circuit components

• Core controller: Arduino Pro Mini acting as the receiver and DCC packet handler
• Bluetooth interface: HC-06 module for wireless communication with the app
• Motor driver: LMD18200 H-bridge providing roughly 2 A continuous motor drive
• Power considerations: selection of DC supply depends on your chosen scale and desired voltage (see Compatibility)

Control capabilities and protections

• Locomotive capacity: can address up to 127 locomotives on a layout
• Concurrent control: supports speed control of up to four locomotives at once
• Safety features: short-circuit protection is built into the system, plus an automatic overcurrent shutoff that can be tuned in the Arduino firmware
• User control: coarse speed adjustment via on-screen sliders and finer increments using dedicated +/- controls

Customization and layout support

• Addressing: you can add custom accessory addresses for turnout or lighting control
• Naming: assign personalized names to each locomotive for easier identification
• Voltage range: works with a DC supply suitable for many scales (typical range about 12–20 V, covering Z/N/OO/HO/O/G)

Software and licensing

• The companion app supplies Arduino source code for the receiver
• The code and app are distributed without usage restrictions, so you’re free to modify or extend the software as needed

Cost and where to buy parts

• Typical parts list (Arduino Pro Mini, HC-06, LMD18200, basic wiring and connectors) can be purchased cheaply online
• Estimated total: roughly £20 when buying components from economical suppliers such as eBay

Alternate option

Star Sport Live — Free Sports Guide is listed as a top alternative. It provides a different user experience for users who prefer a prepackaged app or want features beyond basic DCC control.