2 layers121.9 × 133.4 mm

TivaInterchangeSMD
RobertPHeller/RPi-RRCircuits
A collection of circuit designs for various MCUs, not just Raspberry Pis relating to Model Railroading
112 parts24
Boards in 1 GitHub repository, designed in KiCad, that use the MCT6S by onsemi (-55℃~+100℃ 1.2V 150mV@2mA,16mA 2 30mA 3V 5kV 85V DC Phototransistor SMD-8P Transistor, Photovoltaic Output Optoisolators ROHS). See how each wires it, with its parts, size, README and files; the MCT6S’s symbol, footprint and pinout are on its own page.

RobertPHeller/RPi-RRCircuits
A collection of circuit designs for various MCUs, not just Raspberry Pis relating to Model Railroading