Model Railroad Electronics
Active Projects
(69 projects)
| A | ||
| Adapter-CMRI8-RJ45 |  |
CMRI Breakout8 Adapter RJ45 to 0.100, 3.5mm and 0.156 Molex |
| Adapter-IO4-Breakout |  |
RJ12/6 breakout board, inline IO4-IO4 probe |
| Adapter-IO4-test |  |
IO4 Tester |
| Adapter-IOX-test |  |
MRCS IOX-16 Test Fixture |
| Adapter-RJ45-SignalHead |  |
Adapter RJ45 Signal Head |
| ATEM-Tally-Camera-Light |  |
Part 2 of a RFM69-based BlackMagic ATEM Tally Light system - On Camera Light |
| ATEM-Tally-SDI |  |
Part 1 of a RFM69-based BlackMagic ATEM Tally Light system - ATEM SDI Interface |
| B | ||
| Brakeman |  |
An electronic DCC-track-driven figurine with a red or blue LED |
| Bunza_DCC_Decoder_3PJ |  |
GBunza DCC Decoder v3PJ |
| C | ||
| CAN-Bus-Interface |  |
CAN Bus driver for OpenLCB |
| CMRI-Bus-Interface-L |  |
RS422/485 driver for CMRI-Net - large 3" Tyco rail size |
| Core-ESP32 |  |
Core Field Unit Processor board using an ESP32 Dev Board with Wifi, BLE and a small OLED screen |
| Core-Locobuffer |  |
Standalone "locobuffer-style" Loconet interface with I2C expandability using the USB capability of an Arduino Pro Micro |
| Core-ProMini |  |
IO4-based Arduino ProMini baseboard |
| Core-Wemos |  |
IO4-based ESP8266 Wemos D1 Core Field Processor board with WiFi and I2C |
| CP_Watsonville_Mid-Model |  |
Model Board for CP Watsonville Middle yard - Maintainer Service Panel |
| CP_Watsonville_South-Model |  |
Model Board for CP Watsonville South - Maintainer Sevice Panel |
| cpOD |  |
cpOD |
| D | ||
| Drury-DABSC |  |
Drury-DABSC - Dual ABS Signal Controller |
| I | ||
| I2C-7313-cTc |  |
I2C MAX7313-based IO Expander cTc Wiring Harness |
| I2C-AD4DA |  |
I2C 4x A/D 1x D/A I/O expander based on a PCF8591T |
| I2C-Codeline-Matrix |  |
I2C Slave - Codeline Matrix - DFRobot ProMini with 2x 8x8 LED Matrixes for displaying CodeLine packet content |
| I2C-SignalTestJig |  |
Test Jig for simple signal panels |
| IO4-DCC-Booster |  |
IO4 DCC Booster |
| IO4-IR-Detector-Active |  |
IO4 Quad IR Occupancy Detector |
| IO4-IR-Detector-Active-Fingers |  |
Active IR Detector subassemblies made to look like N or HO scale ties. |
| IO4-IR-Detector-Active-Mount |  |
Mounting adapter for active IR detector remote sensor |
| IO4-IR-Detector-GBunza |  |
IO4 Quad Optical/IR Detector baseboard |
| IO4-IR-Detector-GBunza-Fingers |  |
IR Detector subassemblies made to look like N or HO scale ties. |
| IO4-LED-Strip-Driver | PWM Driver board for high current LED strips | |
| IO4-QuadAnalogSwitch |  |
Quad Analog switch - 16 inputs to 4 A/D lines |
| IO4-QuadOD |  |
IO4 Quad Detector for DCCOD and CPod detector cards - hardwired, IO4 or WeMos/WiFi connected |
| IO4-SignalDriver |  |
IO4 Output adapter driver for a 2-head signal mast |
| IO4-SignalDriver-Small |  |
IO4 Output adapter driver for a 2-head signal mast |
| IO4-Turtle |  |
IO4 Tortoise driver with occupancy and point position feedback |
| IOB-Adapter-Minimal |  |
IOB Adapter - minimal pass through |
| IOB-Baseboard |  |
IOB Baseboard - wiring termination and I2C / Power bus management |
| IOB-I2C-MAX731x |  |
IOB I2C MAX7311/7318 based IO Expander |
| IOB-I2C-MCP23017 |  |
IOB I2C MCP23017 based IO Expander |
| IOB-I2C-PCA9685-PWM |  |
IOB I2C PCA9685 PWN driver |
| L | ||
| LNetPanel |  |
LNetPanel - a distribution panel for LocoNet distribution |
| LocoShield |  |
An electrical interface to Digitrax Loconet |
| M | ||
| MRCS-12v-power-block |  |
Power distribution block for cTc controlled locked turnouts |
| MRCS-Adapter-RJ11 |  |
MRCS - RJ modular Headset connector breakout board |
| MRCS-ATSN |  |
Dispatcher/Operator Telephone board / Electronic Speech Telephone Network board (ASTN) |
| MRCS-BB-Wemos |  |
MRCS cpNode BB-Wemos |
| MRCS-BBProMini |  |
A ProMini in a BBLeo form factor for use on MRCS cpNode |
| MRCS-Candlestick-Base |  |
Wiring base for MRCS-Candlestick-Mic electret carbon mic replacement |
| MRCS-Candlestick-Mic |  |
An electret replacement for a telephone headset carbon mic |
| MRCS-cpNode |  |
Arduino based CMRI node |
| MRCS-cpNode-ProMini |  |
Arduino ProMini based CMRI node in 2.71" form |
| MRCS-cpNode-Wemos |  |
cpNode (2.7" Tyco Rail) processor for MRCS CMRI applications |
| MRCS-Morse-Code-Buzzer |  |
Morse Code Buzzer Board |
| MRCS-MSS-Detector-Crossover |  |
Modular Signaling System Crossover board cpOD-M |
| MRCS-odTester |  |
A simple bench test board for Chubb\'s DCC-OD and MRCS\' cpOD detectors. |
| MRCS-Optical-Detector |  |
Ambiant light optical detector based on GBunza DAPD with Chubb style hysteresis |
| MRCS-PCR-Clinic |  |
MRCS-PCR-Clinic |
| MRCS-RelayBreakout |  |
Breakout for OMRON style DPDT relay |
| O | ||
| OBS-buttons-buttons |  |
Buttons Board for Arduino Keyboard Box |
| OBS-buttons-panel |  |
Panel for Arduino Keyboard Box |
| OBS-buttons-processor |  |
Processor Board for Arduino Keyboard Box |
| P | ||
| PCR-Badge-2015 |  |
PCR-Badge-2015 |
| R | ||
| RFID-RC522-Wemos |  |
RFID reader based on RC522 module with Wemos and LCD |
| S | ||
| ShowMeShield |  |
Arduino IO pin LEDs on wings |
| SignalMast-ColorLight-DualHead |  |
Low cost Signal Mast - single high head Color Light - N scale |
| SignalMast-ColorLight-Dwarf |  |
Low cost Signal Mast - single high head 3-lamp Color Light - N scale |
| SignalMast-ColorLight-SingleHead |  |
Low cost Signal Mast - single high head ColorLight - N scale |
| SignalMast-Searchlight-SingleHead |  |
Low cost Signal Mast - single high head Searchlight - N scale |
| SVL-AuxiliaryPower |  |
SVL Aux Power - local distribution panel |
Obsolete Projects
(23 projects)
| A | ||
| AD4DA-LightUI† |  |
4x slide potentiometers for use with I2C-AD4DA. |
| C | ||
| CMRI-Bus-Interface† |  |
RS422/485 driver for CMRI-Net |
| I | ||
| I2C-23017† |  |
MCP23017 IO Expander with 4x IOB daughterboard connections |
| I2C-7311† |  |
I2C MAX7311/7312-based IO Expander with 4x IOB daughterboard connections |
| I2C-8574† |  |
I2C PCF8474-based IO Expander with 4x IOB daughterboard connections |
| I2C-8574-cTc† |  |
I2C PCF8574-based IO Expander cTc Wiring Harness |
| I2C-9555† |  |
I2C PCF8474-based IO Expander with 4x IO4 connections |
| I2C-9685-PWM† | I2C 16 channel PWM Driver based on a PCA9685 | |
| I2C-Expander† |  |
I2C PCF9555 / or / MCP23017 -based IO Expander with 4x IOB connections |
| I2C-LEDStripDriver† |  |
WiFi/I2C LED Strip Driver based on a PCA9685 |
| IO4-Codeline-Matrix† |  |
IO4 interface for 2x LED Matrix displays (not for I2C expander ports) |
| IOB-Generic† |  |
IOB interface provides 1x IO4 port with 4x generic (hardwired) Input or Output i/o lines. |
| IOB-Inputs† |  |
IOB interface provides 1x IO4 port with 4x Input i/o lines. |
| IOB-LED-Monitor† |  |
IOB LED Monitor daughterboard |
| IOB-Outputs† |  |
IOB Interface provides 1x IO4 port with 4x open drain output i/o lines. |
| IOB-RR-CirKits† |  |
IOB Interface with an 8-bit RR-CirKits-style 2x5 (10-pin) ribbon cable connector |
| IOB-Signal† |  |
IOB Interface drives 2x Signal Heads via a RJ45/8 connector. |
| IOB-Turtle† |  |
IOB Interface provides 1x IO4 port for connection to an IO4-Turtle |
| L | ||
| Loconet-QuadOD† |  |
LocoNet Quad Detector baseboard |
| R | ||
| RailroadShield† |  |
Arduino shield with various DCC Cab Bus and control interfaces |
| RealSignalDemonstrator† |  |
Schematic for discrete wiring of a railroad signal head using an ATTiny and relays |
| S | ||
| SVL-Light-It-Base† |  |
SVL-Light-It-Base |
| T | ||
| TechWomen† |  |
TechWomen STEM board |
† Obsolete projects may have design or operational issues - use them prudently as inspiration...
The technical documentation on this site is licensed under the
CERN Open Hardware Licence v1.2 (for hardware projects) or
MIT Licensea> (for software/firmware),
unless otherwise specified.