The following pages and posts are tagged with

CAN-Bus-Interface Page CAN Bus driver for OpenLCB
CMRI-Bus-Interface-L Page RS422/485 driver for CMRI-Net - large 3" Tyco rail size
CMRI-Bus-Interface Page RS422/485 driver for CMRI-Net
Core-Locobuffer Page Standalone "locobuffer-style" Loconet interface with I2C expandability using the USB capability of an Arduino Pro Micro
I2C-Codeline-Matrix Page I2C Slave - Codeline Matrix - DFRobot ProMini with 2x 8x8 LED Matrixes for displaying CodeLine packet content
IO4-Codeline-Matrix Page IO4 interface for 2x LED Matrix displays (not for I2C expander ports)
LocoShield Page An electrical interface to Digitrax Loconet
Loconet-QuadOD Page LocoNet Quad Detector baseboard
MRCS-BBProMini Page A ProMini in a BBLeo form factor for use on MRCS cpNode
MRCS-cpNode-ProMini Page Arduino ProMini based CMRI node in 2.71" form
MRCS-cpNode-Wemos Page cpNode (2.7" Tyco Rail) processor for MRCS CMRI applications
MRCS-cpNode Page Arduino based CMRI node
RailroadShield Page Arduino shield with various DCC Cab Bus and control interfaces