The following pages and posts are tagged with

TitleTypeExcerpt
I2C-9685-PWM Page I2C 16 channel PWM Driver based on a PCA9685
I2C-LEDStripDriver Page WiFi/I2C LED Strip Driver based on a PCA9685
IO4-IR-Detector-Active-Fingers Page Active IR Detector subassemblies made to look like N or HO scale ties.
IO4-IR-Detector-Active-Mount Page Mounting adapter for active IR detector remote sensor
IO4-IR-Detector-Active Page IO4 Quad IR Occupancy Detector
IO4-IR-Detector-GBunza-Fingers Page IR Detector subassemblies made to look like N or HO scale ties.
IO4-IR-Detector-GBunza Page IO4 Quad Optical/IR Detector baseboard
IO4-LED-Strip-Driver Page PWM Driver board for high current LED strips
IO4-QuadOD Page IO4 Quad Detector for DCCOD and CPod detector cards - hardwired, IO4 or WeMos/WiFi connected
IO4-Turtle Page IO4 Tortoise driver with occupancy and point position feedback
Loconet-QuadOD Page LocoNet Quad Detector baseboard

You are free to download these files and make your own boards.